Engine-Codes - Mercedes-Benz - P0330 Mercedes-Benz

P0330 Mercedes-Benz Code - Knock/Combustion Vibration Sensor 2 Circuit Bank 2

- Code Popularity: 9,065 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
Table of contents
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What are the Possible Causes of the DTC P0330 Mercedes-Benz?

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 2 Bank 2
  • Knock Sensor 2 Bank 2 harness is open or shorted
  • Knock Sensor 2 Bank 2 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

Code Tech Notes

Mercedes Benz Code = 0508 (knock sensor 2, left) has an electrical fault. (P0330)

The P0330 code means that the Knock Sensor is not working correctly. Problems with the knock sensor will not cause engine performance problems. Replacing the knock sensor usually takes care of the problem.

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How to Fix the DTC P0330 Mercedes-Benz?

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 P0330 Mercedes-Benz 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?

An excessively low or high voltage from the Knock 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 P0330 Mercedes-Benz Code Mean?

This fault code is stored in the Engine Control Module (ECM) when a combustion anomaly is detected. When irregular combustion takes place a detectable knock or vibration occurs. This acts on the knock sensor and causes a voltage to be generated by the component. The ECM then uses the output from the camshaft position sensor to calculate the knock window for a given ignition event. The knock window is the angular period, in crankshaft rotation, when combustion knock can occur. If the knock sensor produces a voltage outside of the knock window, the signal will be ignored. For correct operation of the knock sensor, the component must be torqued to the correct tightness and the retaining bolt must be replaced after it has been removed. The engine lubrication system should also be inspected as a fault here could result in false knock sensor codes being generated.
P0330 Mercedes-Benz Code - Knock/Combustion Vibration Sensor 2 Circuit Bank 2

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