P27A6

Electric/Auxiliary Transmission Fluid Pump B Stuck On

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$50–133 (est.)

Symptoms

Humming or buzzing noise from the transmission area
Transmission fluid overheating
Reduced transmission efficiency
Increased fuel consumption
Malfunction indicator light comes on

Causes

Mechanical pump jam
Pump relay fault
Short circuit in control circuit
Connector or wiring problems
Transmission control module (TCM) failure

How to Fix

Check the functionality of the pump and its electrical connections
Check the condition of the transmission fluid pump relay
Check control circuit for short circuits
Assess the condition of the wiring and connectors
If necessary, replace the transmission fluid pump

Related codes

P27A5 P27A7 P0AFA