P0C28

Electric/Auxiliary Transmission Fluid Pump A Motor Current High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Gear shifting problems
Noise or humming noise from the transmission fluid pump
Reduced transmission performance
Activating transmission emergency mode

Causes

Pump motor malfunction
Problems with wiring or connections
Faulty relay or pump control unit
Mechanical resistance in the pump
Low or contaminated transmission fluid

How to Fix

Check the level and condition of the transmission fluid
Diagnose the pump motor for resistance and current
Check the integrity of wiring and connections
Test the relay and pump control unit
If necessary, replace the transmission fluid pump

Related codes

P0C29 P0C2A P0C2B