OBD Guide

P0885

TCM Power Relay Control Circuit/Open

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–33 (est.)

Symptoms

  • Gear shifting problems
  • The gearbox goes into emergency mode
  • Check Engine light comes on
  • The car may not move

Causes

  • Faulty TCM relay
  • Open or short circuit in wiring harness
  • Corrosion of relay contacts
  • TCM module malfunction
  • Circuit fuse problems

How to Fix

  1. Check the condition of the circuit fuse
  2. Inspect the TCM relay and replace if necessary
  3. Check wiring harness for damage
  4. Clean relay contacts from corrosion
  5. Check the TCM module for malfunctions

Related codes

Error P0885 by Vehicle Brand