Mercedes Benz Code = 0162 (Throttle valve actuator): Actual value potentiometer 1: Short circuit to ground (P0122)
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.
The cost to diagnose the P0122 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.
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.
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