P28ED

Electric/Auxiliary Transmission Fluid Pump B Overspeed

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
The car goes into emergency mode
Problems when shifting gears
Unusual noises from the transmission area
Reduced engine power

Causes

Electrical transmission fluid pump malfunction
Problems with pump wiring or contacts
Low transmission fluid level
Transmission control unit malfunction
Mechanical damage in the transmission lubrication system

How to Fix

Check the level and condition of the transmission fluid
Diagnose the electrical circuit of the pump
Check pump functionality
Scan the transmission control module for other errors
Replace the faulty pump if necessary

Related codes

P28EE P28EC P28EF