P277D

Electric/Auxiliary Transmission Fluid Pump B Motor Over Temperature

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

The Check Engine light comes on
Gear shifting problems
Reduced transmission performance
Unusual noises from the transmission area
Transmission transition to emergency mode

Causes

Transmission fluid pump motor malfunction
Problems with the pump's electrical circuit
Clogged or low transmission fluid
Pump overload due to mechanical problems in the transmission
Malfunction of temperature sensor or control module

How to Fix

Check the level and condition of the transmission fluid
Diagnose the electrical circuit of the pump for breaks and short circuits
Check the resistance and operation of the pump motor
Scan the system for related trouble codes
If necessary, replace the pump motor or its components.

Related codes

P277C P277E P277F