P27A1

Electric/Auxiliary Transmission Fluid Pump A Stuck On

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Gear shifting problems
Unusual noises from the transmission area
Reduced transmission efficiency
Transmission fluid overheating

Causes

Mechanical jamming of the pump
Pump motor malfunction
Problems with wiring or connectors
Faulty relay or fuse
Problems with the transmission control unit

How to Fix

Check the condition of fuses and relays
Diagnose the electrical circuit of the pump
Check pump functionality
Replace the pump if necessary
Check the operation of the system after repair

Related codes

P27A0 P27A2 P27A3