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P0327 Mercedes-Benz Code - Knock/Combustion Vibration Sensor 1 Circuit Low Bank 1

- Code Popularity: 9,233 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0327 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
  • Knock Sensor harness is open or shorted
  • Knock Sensor circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC P0327 Mercedes-Benz?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

Mercedes Benz Code = 0502 (knock sensor 1, right) has a short circuit to ground. (P0327)

The P0327 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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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0327 Mercedes-Benz code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

An excessively low 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

Code P0327 Mercedes-Benz Description

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.
OBDII Code P0327 Mercedes-Benz - Knock/Combustion Vibration Sensor 1 Circuit Low Bank 1 - AutoCodes.com
P0327 Mercedes-Benz Code - Knock/Combustion Vibration Sensor 1 Circuit Low Bank 1

Need More Information on the Code?

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