P28EE

Electric/Auxiliary Transmission Fluid Pump B Underspeed

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Delays when shifting gears
The gearbox goes into emergency mode
Unusual noises from the transmission area
Reduced transmission efficiency

Causes

Electrical transmission fluid pump malfunction
Problems with pump wiring or connectors
Low transmission fluid level
Faulty pump relay or fuse
Problems with the transmission control unit

How to Fix

Check the level and condition of the transmission fluid
Diagnose the electrical circuit of the pump (voltage, resistance)
Check fuses and relays associated with the pump
Test or replace transmission fluid pump
If necessary, reflash or replace the transmission control unit

Related codes

P28EF P28ED P28EC