P0340 Code - Camshaft Position Sensor 'A' Circuit Malfunction
Quick Answer
The P0340 code indicates that there is a malfunction in the camshaft position sensor 'A' circuit. Common causes include Faulty camshaft position sensor, Wiring issues or loose connections in the sensor circuit, Dirty or contaminated sensor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0340 indicates Camshaft Position Sensor 'A' Circuit Malfunction.
- Common causes
- Common causes include Faulty camshaft position sensor, Wiring issues or loose connections in the sensor circuit, Dirty or contaminated sensor.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0340 Description
The P0340 code indicates that there is a malfunction in the camshaft position sensor 'A' circuit. This sensor is responsible for monitoring the position of the camshaft in relation to the crankshaft, and it plays a crucial role in determining the ignition timing and fuel injection timing. When this sensor malfunctions, it can lead to issues with engine performance, fuel efficiency, and emissions control. If not addressed, it can potentially cause the engine to misfire, stall, or fail to start altogether.
Common Causes of P0340
- Faulty camshaft position sensor
- Wiring issues or loose connections in the sensor circuit
- Dirty or contaminated sensor
- Timing belt or chain issues affecting camshaft position
- ECM (engine control module) failure
Symptoms of P0340
- Engine misfires or rough idling
- Decreased fuel efficiency
- Difficulty starting the engine
- Engine stalling
- Illumination of the check engine light
How to Fix P0340
- Diagnose the issue by using a scan tool to confirm the P0340 code and check the camshaft position sensor readings.
- Inspect the wiring and connections for any damage or corrosion, repairing or replacing as necessary.
- Clean the camshaft position sensor to remove any debris or contamination.
- If the sensor is faulty, replace it with a new one.
- Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0340
The cost of repairing a camshaft position sensor 'A' circuit malfunction can vary depending on the make and model of the vehicle, as well as the specific cause of the issue. On average, the cost of replacing a camshaft position sensor ranges from $100 to $250, including parts and labor. Additional costs may apply if wiring repairs or ECM replacement is needed. It's recommended to consult with a professional mechanic or auto repair shop for an accurate estimate based on your vehicle's specific needs.
Tech Notes for P0340
User Submitted Video
When is the Code Detected?
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Code P0340 Information for Specific Makes
- P0340 Acura — Camshaft Position Sensor 'A' No Signal
- P0340 Audi — Camshaft Position Sensor
- P0340 BMW — Camshaft Sensor Inlet Signal
- P0340 Buick — Camshaft Position Sensor Circuit
- P0340 Cadillac — Camshaft Position Sensor Circuit
- P0340 Chevrolet — Camshaft Position Sensor Circuit
- P0340 Chrysler — Camshaft Position Sensor Circuit Bank 1 Sensor 1
- P0340 Dodge — Camshaft Position Sensor Circuit Bank 1 Sensor 1
- P0340 Ford — Camshaft Position Sensor Circuit Bank 1 Sensor 1
- P0340 GMC — Camshaft Position Sensor Circuit
- P0340 Honda — Camshaft Position Sensor 'A' No Signal
- P0340 Hyundai — Camshaft Position Sensor 'A' Circuit Malfunction Bank 1 Or Single Sensor
- P0340 Infiniti — Camshaft Position Sensor Circuit Bank 1
- P0340 Isuzu — Camshaft Position Sensor Circuit
- P0340 Jaguar — Camshaft Position Sensor Circuit Bank 1 Sensor 1
- P0340 Jeep — Camshaft Position Sensor Circuit Bank 1 Sensor 1
- P0340 KIA — Camshaft Position Sensor Circuit Malfunction
- P0340 Lexus — Camshaft Position Sensor Circuit Malfunction
- P0340 Lincoln — Camshaft Position Sensor Circuit Bank 1 Sensor 1
- P0340 Mazda — Camshaft Position Sensor Circuit Malfunction
- P0340 Mercedes-Benz — Camshaft Position Sensor 'A' Circuit Malfunction
- P0340 Mercury — Camshaft Position Sensor Circuit Bank 1 Sensor 1
- P0340 MINI — Camshaft Sensor Inlet Signal
- P0340 Mitsubishi — Camshaft Position Sensor Circuit
- P0340 Nissan — Camshaft Position Sensor Circuit Bank 1
- P0340 Pontiac — Camshaft Position Sensor Circuit
- P0340 RAM — Camshaft Position Sensor Circuit Bank 1 Sensor 1
- P0340 Saab — Camshaft Position Sensor 'A' Circuit Malfunction
- P0340 Saturn — Camshaft Position Sensor Circuit
- P0340 Scion — Camshaft Position Sensor Circuit Malfunction
- P0340 Subaru — Camshaft Position Sensor 'A' Circuit Signal Fault Bank 1 Or Single Sensor
- P0340 Suzuki — Camshaft Position Sensor 'A' Circuit Malfunction
- P0340 Toyota — Camshaft Position Sensor Circuit Malfunction
- P0340 Volkswagen — Camshaft Position Sensor
- P0340 Volvo — Camshaft Position Sensor 'A' Circuit Malfunction
Frequently Asked Questions about P0340 Code
1. What are the common symptoms of OBDII code P0340 (Camshaft Position Sensor 'A' Circuit Malfunction)?
- Common symptoms include engine stalling, rough idling, poor acceleration, and difficulty starting the vehicle.
2. What are the possible causes of OBDII code P0340?
- The code can be triggered by a faulty camshaft position sensor, damaged wiring or connectors, issues with the timing belt or chain, or a problem with the engine control module (ECM).
3. How can I diagnose the cause of OBDII code P0340?
- Diagnosing the issue involves checking the camshaft position sensor, inspecting the wiring for damage, testing the sensor's voltage, and verifying the timing belt or chain alignment.
4. Can a bad camshaft position sensor cause OBDII code P0340?
- Yes, a faulty camshaft position sensor is a common cause of OBDII code P0340 as it affects the signal sent to the ECM, leading to a circuit malfunction.
5. How can I repair OBDII code P0340?
- Repairing the issue may involve replacing the camshaft position sensor, repairing or replacing damaged wiring, ensuring proper timing belt/chain alignment, or resetting the ECM.
6. Is it safe to continue driving with OBDII code P0340 present?
- It is not recommended to drive with OBDII code P0340 as it can lead to further engine damage and potentially cause unsafe driving conditions.
7. Can a DIY enthusiast fix OBDII code P0340 at home?
- Depending on the cause, DIY enthusiasts may be able to fix OBDII code P0340 by replacing the camshaft position sensor or repairing damaged wiring, but complex issues may require professional help.
8. Will resetting the OBDII code P0340 turn off the check engine light?
- Resetting the code may turn off the check engine light temporarily, but if the underlying issue is not fixed, the code and light will likely reappear.
9. How much does it cost to repair OBDII code P0340 at a mechanic?
- The cost of repairing OBDII code P0340 at a mechanic can vary depending on the cause, but it may range from $100 to $400 for parts and labor.
10. Does OBDII code P0340 affect fuel efficiency?
- Yes, OBDII code P0340 can impact fuel efficiency as it can cause engine misfires, poor acceleration, and other issues that affect overall performance.
Discuss the causes and fixes for P0340 OBDII Code
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Camshaft Position Sensor A Bank 1 Circuit Malfunction - Intake Camshaft Bank 1
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What make, model and year is your vehicle? did you use a factory sensor or aftermarket?
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Can I still drive the car while the problem accured? and wait for the weekend to replace it,
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You should try fixing the problem as soon as possible. One of the symptoms of the Camshaft Position Sensor is engine stalling, you don't want the engine to stall in the middle of the rod.
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I changed my SYNCRONIZER and sensor but still getting Code P0340 but I don't have any symptoms like rough idle, hard to start or dying. I did use a
WORLD POWER SYSTEMS CAMS2600 Engine Camshaft Synchronizer
which is an aftermarket. It's running fine though. What should I do? -
I own a 2005 Ford Mustang GT. I replaced the sensor but the check engine light remains on and the same code comes up.
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97 gmc yukon 5.7 changed (4) 02 sensors to remove 02 codes . Also changed cap & roter battery is good. now have P0102 mass air low input & ( pending P0340 cam position sen. Circuit & P0441 evap.emission purge cont. Circuit malf.)
Symptoms stalling when engine is cold , & occasionally jerking at hwy speeds. -
The P0441 (EVAP System) won't cause the stalling problem, but either the Camshaft Position Sensor (P0340) or the Mass Air Flow (MAF) sensor could cause the stalling and jerking problem. I suggest starting by replacing the Camshaft Position Sensor and cleaning the MAF.
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I just replaced the camshaft sensor about 6 months ago and it is giving me the same code. Any ideas why this could be happening?
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What make, model an year is your vehicle? start by checking the connector and/or debris on the sensor.
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I have an 2007 ford f-150 codes P0345 and P0349 keep popping up every other start and I have replaced the camshaft positioning sensor and pig tail, its the 5.4L triton what would cause these codes to keep popping up?
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You may have a problem with the Variable Cam Timing (VCT) solenoids. Check this video for more information on the VCT: http://youtu.be/arxbvPdOpVM
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I replaced the sensor and its still giving me the same code. I have an 2006 kia spectra5
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Was any repair done before you replaced the sensor? has the engine ever overheated? If no repair where done before you replaced the engine, then you could have a poor connection from the control unit to the sensor. Start by checking the connectors and wires to the sensor.
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i have a nissan pathfinder 2005 it give me the code po340 i chenge thr camshaft posion sensor and it still give me thesame code what can i do
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What side did you replaced? either the wrong sensor was replaced, the mew sensor is faulty or there is a problem with the timing chain.
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I've had this code on for a while now.. No mechanic knew what the code was so I couldn't get the problem fixed.. have been through a transmission, radiator, water pump, timing belt, new battery and they are just now saying it's the crank position sensor.. Is $430 a good price for labor and parts?.. I
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What make, model and year is your vehicle? Is that the price for just the sensor?
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I have an 06 Nissan Sentra. I replace the position sensor about 18 months and then again about 12 months ago. It started acting up again about 4 weeks ago. This morning it would not start at all - was trying to turn but would not catch. Got another sensor assuming it was the same issue since all symptoms were the same. I replaced the sensor and now it sounds worse. Its trying, but does not even sound like its trying to turn over. Ideas?
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i have a 2005 dodge neon 2.0 non turbo i got the same code after my car stall i changed the camshaft sensor it still reads the same code and still doesnt want to turn on what else could be the problem
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hi i replaced my camshaft position sensor on my 1997 lexus Ls400 and the car won't start but if i unplug the sensor the car will start but it runs rough?????????????
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I changed the water pump on a 2012 Fiesta 1.6L ,its hard to start but runs good now I have the P0340 code
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The Camshaft Position Sensor shouldn't have nothing to do with the water pump, it could be just coincidence.
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I have a 2007 Chrysler pacifica with trouble codes PO 344, P2078 and P2017. I checked the wiring, replaced the sensor, my battery is good any other suggestions?
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My 2005 dodge hemi is giving p0340 code. Stalls hard to start. Changed camshaft position sensor twice 6 months ago. Also crank shaft position sensor. Its had both codes at seperate times. Not sure were go from here. Change again?
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P0340 2008 Nissan Maxima - Camshaft Position Sensor Circuit Bank 1
Read more: https://www.autocodes.com/p03...
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I'm getting the same problem on my 2001 Intrigue. I hope it's just a a sensor replacement.
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camshaft position sensor high voltage car wont start easy and slow when pushing on the gas i changed the sensor yesterday and still doing the same thing
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What make model and year is your vehicle? did you use factory sensor? how is the starter motor?
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Hi. My 2006 Pathfinder has had both camshaft position sensors replaced, as well as the crankshaft position sensor. I'm still having intermittent stalls and rough idling, and when it happens it throws p0340. My mechanically inclined friends and acquaintances are in disagreement over whether the timing chain could be an issue, even when I point them to NTB09-128. What are your thoughts?
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It the timing chain is not making noise, then the timing chain issue is not the problem. After clearing the code, how fast does the code comes back? could be problem with the wire harness or the intake valve solenoid
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Thanks for the response.
There is a definite whine that rises and falls with RPMs, and a faint rattle that doesn't seem affected by RPMs at all. After clearing the p0340 code, it might take a week to come back or less than a day. Would a timing chain problem be so intermittent? -
The whine it's more than likely from the timing chain, but it's unusual to have a Camshaft Position Sensor code that intermittent. My best guess is that the sensor is failing again, which is not unusual to have a new sensor fail again, besides is a lot cheaper replacing the sensor again instead of the timing chain repair.
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Hi, I have a bmw 116 petrol got in car and wouldn't start after being out when cold it will start up run rough then level out and then run rough again then die and won't start again laptop brings up code p0340 does this relate to crankshaft sensor being faulty anyone have any ideas??
Thanks -
Hi my Wife's 09 Chevy HHR 2.2l has the Camshaft Position sensor code on it wet on as so as they put Synthetic Motor Oil in it. We never used full synthetic before its always been the semi synthetic. Can that have any thing to do with it ....It is just funny how soon as she got back in the car after they did the oil change the code was there.
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It's very unlikely that the synthetic oil is causing the problem. If there are no other symptoms, you could try clearing the code first and drive it.
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I have the P0340 code on my 2001 Nissan Xterra V6 SE. The car turned off while I was driving. Didn't want to start and then after a couple of hours it starts and is fine. However one I try to ride it and hit 3,000 rpm the rpm gauge starts going up and down and car dies again. What could it be?
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The problem is more than likely the Camshaft Position Sensor. The sensor is part of the distributor, you probably have to replace the distributor to fix the problem.
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i have a problem, could you say me where is the camshaft sensor on a 2001 astra 2.2 . Do you have any image ?? thank you
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I have a 2001 oldsmobile intrigue that starts, but runs very rough with knocking and sputtering. I have a code of P0340 and P0340 p/d. I replaced the cam and crack sensors and that clears the codes but didn't help the knocking, sputtering and rough idle/running. The car has a two three-coil packs. Each pack connects directly to the three spark plugs on each side of the engine. Could a bad coil in one or both of the packs cause the problems with the rough running and subsequently give these codes again?
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Bad coil could cause the problem, but it should also trigger the misfire codes. Unfortunately there are many things that could cause the symptoms you described. Here are a few things that I have seen could cause the problem:
- Bad gas
- Faulty Mass Air Flow Sensor
- Faulty Spark Plugs
- Faulty Coils -
04 f150 p0340 I replace both cam shaft sensor and the vct sensor also still truck stall and shake anyone have a clue?
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What make and model is your vehicle? usually replacing the camshaft position sensor take care of the problem.
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Hello,please i need your suggestions.My Honda accord 2006 model 2.4L Engine runs in a limp mode.i have changed the crank shaft position sensor but its still on a limp mode.initially i was having hard starting and after a while the vehicle stall and stop while in motion until i wait for a while before it will start again.i could also find black carbon on my exhaust and also high combustion of gas.i was told by my technician that the wiring to the crankshaft sensor was faulty.All wiring has been checked and fixed,i no longer have difficulty in starting anymore,the gas combustion rate is normal now.But the car is still in limp mode after changing the crank shaft sensor. please i need your help.
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I have same truck with 5.4 triton I've replaced both sensors and there are no problems with current coming to it yet it's still idling rough and still throwing the code
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I have the same issue with my 2001 Nissan Frontier 3.3L 4X2 and I already replaced the distributor for the Camshaft position sensor still getting that code and still it won't start it sounds like it wants to but it just won't start.
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Other than the camshaft position sensor itself (distributor), other things that can cause the problem are the low battery charge, bad starter or a broken wire from the sensor to the Engine Control Module (ECM).
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Hello, I have a 2010 Sentra. I have the CEL on VDC And SLIP lights all on. I have had the brake pads changed a year and a half ago, the brake fluid level is topped. I have had my cam position sensor replaced 7 months ago and yet my car is still having issues with cold start. I am beyond frustrated. Ever forum I have read suggested replacing the camshaft position sensor. Did that....didn't work. And to top it all off. A couple weeks ago computer game me another camshaft positions sensor reading Bank 1 (exact same one as last time) ?
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Hi! My Vw polo,fuel gas,was stalling n there was loss of power too.The repairer replaced two rocker arm which was broken,camshaft,cam sensor and crank sensor.I drove the car for three days n was running fine.But now the again is stalling and 'check engine light" is being displayed.what are the possible causes and solution.
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Just to be clear, so now you still have issues with cold start, the warning lights and the P0340 code?
The brake pads you replaced was a maintenance item, so probably have nothing to with the problems.
The issues with cold start, could be related to the fuel pump or fuel quality. You could start by using high octane gas and fuel additive, before replacing any parts.
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Its possible that something may have come loos during the repair. I suggest taking you vehicle back to the mechanic that did the repair.
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I had the dealership evaluate my P0340 on my 04 G35 and replace my bank1 sensor due to "magnetic contact damage", but they are telling me there might be another electrical problem and my P0340 is not resolved, as the angle on bank1 is stuck at 64 degrees, bank 2 is fluctuating without issue.. They want to spend 4 hours evaluating the harnesses and charge around $1k. Any idea what might be wrong?
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Did you had any other symptoms, besides the engine light and code P0340 code?
Most of the times replacing the sensor take care of the problem. I some very rare ocacions, the Intake Valve Timing Control Solenoid, could also set the P0340 code. -
The only symptom I am aware of is difficulty starting so far. The mechanic has already replaced the bank 1 sensor, and says the issue remains. I'm not aware of any new problem codes, but I will be sure to ask the mechanic today when I talk to him later.
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So according to the mechanic, intake valve solenoid in front for bank 2 is reading ok, rear intake valve solenoid for bank 1 is ok on continuity but is still giving the 64 degree reading after the camshaft sensor replacement. There are no additional error codes.
He said the harness side pins looked good and wants to trace the electrical system next. -
I talked to my tech friends, but unfortunately, other than the sensor we haven't seen anything else triggering the code. There is always the possibility that the tech at the dealer is changed the wrong sensor or didn't properly installed the sensor.
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They found the issue finally after they confirmed the wiring was all ok.. they finally used a borescope into the sensor orifice and found metal debris attached to the camshaft lobe causing it to throw the error. Once they cleaned the debris, it was ok, and the code cleared.
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05 nissan pathfinder throwing codes for camshaft and crankshaft sensors. have changed all three of them multiple times and still having problems? stalling, dying, wont start?? need help
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Sounds like the timing chain may have jumped timing. If you have already replaced the sensor, then the next step is to check the timing chain.
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i have a diagnostics tool (im a maillady had to invest in one) would it show a code for the timing chain if that was the underlying issue? or could it just be i need to quit buying sfter market and spend the 200 bucks at part store? because the codes still states it the sensors?
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If you already changed the sensors "multiple" times, then I doubt buying OEM sensors would fix the problem.
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Thank you I'll have the husband check it out :) I appreciate the advice!
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I have a kia sportage 2012 its a 2.4 litter we changed the crank shaft sensor twice and it still stays the same code. And won't start .can u help me and see what if can be
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The P0340 code is for the "Camshaft Position Sensor" and not for the crank shaft position sensor.

Click here to enlarge image -
Also would add under possible causes, "Or mechanical damage (can't trigger the sensor)"
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Engine oil should not go thought the sensor. It's not normal to have oil on the electrical connector.
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ive changed camshaft sensor on my vauxhall meriva 03 plate but light is still on and giving me same code how can i get this light off please
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ive just changed camshaft sensor but light is still on and giving me same code as before how do i get light out i have a vauxhall meriva 03 plate
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Change the sensor and put a washer between the bolt and the the engine and it will be solved
The problem it’s on the cam shift ring it gets warn from late oil changes
Thanks guys -
I have a 2004 dodge ram srt10 and im having a P0340 camshaft position sensor signal lost. The truck turns over but wont start completely. I checked for wire broken or connectors and i checked the whole wiring of it. The camshaft postion sensor is good and still brand new.
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I checked a national database of repairs for your vehicle, and the other 2 things listed triggering the P0340 code is the crankshaft position sensor and the PCM program.
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You probably have to replace the Camshaft Position Sensor to fix the problem.
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i have the same problem in my f150 2010 i change the VCT solenoids the phasers and the camshaft position sensor and the same problem i dont know what to do but i´dont have a stall problem and my engine don´t loose rpm
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Unfortunately I haven't had that problem before, and also check a national database of repairs and the factory service manual, and other than the Camshaft Position Sensor, there are no other repairs. I did found this video online. I hope it helps
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I have a 99 vw beetle 2.0 and am getting the cam shaft sensor code, car died and wont start. Installed a new one and a crank shaft position sensor also, car still wont start and is still giving the same code. Bought a new cam shaft sensor, installed it and it still wont start. Any ideas on why 2 new sensors aren't clearing the code? I have the timing in the correct position.
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Sounds like you may have a damage or stretched timing belt. According to a national database of repairs, the timing belt is the most likely cause of the problem after the camshaft position sensor.
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i have a 2008 suzuki sx4
its throwung this code, but i have no issues starting it, has a rough idle, switched the cam sensor out, checked the plugs, and coil packs, checking the wires now, from the start to the end. i can get the code to clear while I am driving and run perfect, but as soon as i turn it off and restart it is back on. the plugs were awful when i pulled them so when i replaced them i did notice a difference but not big enough to not set the code again. this is my first suzuki but not vehicle and its got me all confused. any input would be greatly appreciated. tia. -
Unfortunately I never had that problem before, usually the sensor is the cause of the problem. I checked a national database of repairs for the same issue and there is no extra information either. According to the factory service manual, your next step is to check the wires from the sensor to the Engine Control Module and/or check the camshaft signal rotor teeth for damage.
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Hello, I have a 2010 Jeep Commander. The code p0340 came up, the vehicle will crank but will not start. I changed the cam sensor, just wishful thinking I guess. The code still remained as "permanent". I got to looking at harness noticed the harness was melted together. Fixed the harness, using my cheat the system method. "Will not elaborate"! The code is gone, but still it will crank not start. Took the cam sensor out, spun engine over and watched through the cam sensor hole. The cam was not turning but the crank was. Broken timing chain. I do believe the shorted harness caused the engine to kick back and broke the worn out chain. Just putting this info out there, hope it helps someone!
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so a washer between the sensor body and the block??? the sensor body mates with the engine block.
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