P0887

TCM Power Relay Control Circuit High

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
The transmission goes into emergency mode
Gear shift limitation
Fixation in one gear
Reduced engine power

Causes

Faulty TCM power relay
Damage to the control circuit wiring harness
Short circuit to ground
TCM power problems
Malfunction of the TCM module itself

How to Fix

Check the condition of the TCM power relay
Inspect the wiring harness for damage
Check control circuit voltage
Test the circuit for short circuit
Replace relay or TCM if necessary

Related codes

P0888 P0886 P0889