Engine-Codes - Mercedes-benz - P0801 MERCEDES-BENZ

P0801 MERCEDES-BENZ Code - Reverse Inhibit Control Circuit Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|P0801 MERCEDES-BENZ code possible causes

  • Faulty Reverse Inhibit Solenoid
  • Reverse Inhibit Solenoid harness is open or shorted
  • Reverse Inhibit Solenoid circuit poor electrical connection

|How is the P0801 MERCEDES-BENZ code repair?

Start by checking 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's pins.

|What is the cost to diagnose the P0801 MERCEDES-BENZ code

Labor: 1.0

The cost to diagnose the P0801 MERCEDES-BENZ code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are P0801 MERCEDES-BENZ code possible symptoms?

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

|What is P0801 MERCEDES-BENZ code meaning?

An ignition voltage is supplied to the Reverse Inhibit solenoid. The Powertrain Control Module (PCM) controls the solenoid by grounding the control circuit via an internal switch called a driver. The driver supplies the ground for the component being controlled. Each driver has a fault line which the PCM monitors. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM commands the control circuit to a component OFF, the voltage potential of the circuit should be high (near battery voltage). If the fault detection circuit senses a voltage other than what is expected, the fault line status changes causing the P0801 code to set.

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