Engine-Codes - Mercedes-benz - P0781 MERCEDES-BENZ

P0781 MERCEDES-BENZ Code - 1-2 Shift Malfunction

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

|P0781 MERCEDES-BENZ code possible causes

  • Low transmission fluid level
  • Dirty transmission fluid
  • Faulty shifting solenoid valve
  • Shifting solenoid valve harness is open or shorted
  • Shifting solenoid valve circuit poor electrical connection

|How is the P0781 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 P0781 MERCEDES-BENZ code

Labor: 1.0

The cost to diagnose the P0781 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.

|When is the P0781 MERCEDES-BENZ code detected?

The P0781 code is detected when actual gear position and the commanded gear position are different

|What are P0781 MERCEDES-BENZ code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Transmission may not shift to the next gear.

|What is P0781 MERCEDES-BENZ code meaning?

This P0781 code indicates that the 1-2 shift valve in the valve body is locked in the direction of the spring compression. The Transmission Control Module (TCM) controls the gearshifts by turning the shift solenoid valves ON/OFF and switching oil pressure to the valves in the valve body. The TCM calculates the actual transmission gear by comparing the signals from the input speed sensor and the output speed sensor.

|Need more information with the P0781 MERCEDES-BENZ code?

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|Need help with a P0781 MERCEDES-BENZ code?

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