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P0122 Mercedes-Benz Code - Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input

- Code Popularity: 26,894 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0122 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 Accelerator Pedal Position Sensor
  • Accelerator Pedal Position Sensor harness is open or shorted
  • Accelerator Pedal Position Sensor circuit poor electrical connection
  • Faulty Throttle Position Sensor (TPS)
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC P0122 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 = 0162 (Throttle valve actuator): Actual value potentiometer 1: Short circuit to ground (P0122)

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0122 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.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P0122 Mercedes-Benz Description

This fault code is stored in the Engine Control Module (ECM) when a malfunction is detected in the throttle control system. The driver demand is sensed via the accelerator pedal position sensor. The engine control module adjusts the throttle position accordingly and the throttle position is returned to the engine control module via the throttle position sensor. European On-Board Diagnostics (EOBD) compliant vehicles use at least two accelerator pedal position sensor and at least two throttle position sensors for redundancy. Failure of one circuit can easily be identified and vehicle operation will remain unaffected.

OBDII Code P0122 Mercedes-Benz - Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input  - AutoCodes.com
P0122 Mercedes-Benz Code - Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input

Need More Information on the Code?

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