Engine-Codes - Toyota - P0325 2001 Toyota Highlander

P0325 2001 Toyota Highlander Code - Knock Sensor Circuit Bank 1

- Code Popularity: 10,184 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0325 2001 Toyota Highlander?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Knock Sensor
  • Knock Sensor circuit poor electrical connection
  • Knock Sensor harness is open or shorted
  • Faulty Engine Control Module (ECM)

Code Tech Notes

The P0325 code means that the Knock Sensor is not working properly. Replacing the knock sensor usually takes care of the problem.

You maybe also consider replacing the knock sensor short harness to avoid future problems.
If you have a V6 Toyota Highlander, it is recommended you replace both knock sensors and short harness to avoid re-doing the labor since it is alot of work, since it is located under the intake manifold.

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How to Fix the DTC P0325 2001 Toyota Highlander?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0325 2001 Toyota Highlander code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

When is the Code Detected?

When an excessively low or high voltage from the sensor is sent to Engine Control Module (ECM)

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine Lack / Loss of Power

What Does the P0325 2001 Toyota Highlander Code Mean?

The Knock Sensor (KS) senses engine knocking (also known as detonation or pinging) using a piezoelectric element. The sensor is attached to the cylinder block, cylinder head or intake manifold. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Engine Control Module (ECM). The ECM uses this signal to retard the ignition timing and protect the engine from this damaging pre-ignition.

P0325 2001 Toyota Highlander Code - Knock Sensor Circuit Bank 1

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