P0781 - 1-2 Shift Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

P0781 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 do I fix code P0781?

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's pins.
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Cost of diagnosing the P0781 code

Labor: 1.0

The cost of diagnosing the P0781 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected?

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

Possible Symptoms

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

P0781 Description

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.
OBDII Code P0781 - 1-2 Shift Malfunction - AutoCodes.com

More Information

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