P0889

TCM Power Relay Sense Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$6–33 (est.)

Symptoms

Delayed gear shifting
The gearbox goes into emergency mode
Check Engine Light Is On
Unstable transmission operation
Difficulties when shifting gears

Causes

Faulty TCM relay
Damaged wiring or poor contacts
Corrosion in connectors
Problems with the TCM control module
Low voltage on-board network

How to Fix

Check TCM relay status
Inspect wiring and connectors for damage
Check the voltage in the relay circuit
Test the TCM control module
If necessary, replace the relay or wiring

Related codes

P0888 P0890 P0891