top of page

P0856

Overview

Code

P0856

Code Type

P

Code Class

P0

System

Transmission

Severity Level

High

Emissions Related

true

Drivability Impact

Major

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0856 indicates a malfunction in the transmission control module (TCM) circuit

Symptoms

Slipping transmission Transmission stalling

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Transmission control module (TCM) circuit

Possible Causes

Faulty TCM Wiring or connection issues

Diagnostic Steps

1 Inspect TCM2 Test TCM circuit

Drive Safety Notes

A malfunction in the TCM circuit can cause poor shifting and overall drivability issues

bottom of page