P0B01

Electric/Auxiliary Transmission Fluid Pump Motor Phase U Current Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

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

Causes

Open or short circuit in phase U circuit
Pump motor malfunction
Problems with the connector or wiring harness
Transmission control module (TCM) malfunction
Poor contact in electrical connections

How to Fix

Check the continuity of phase U
Check the condition of the connectors and wiring harness
Test the pump motor
Check the operation of the transmission control module
Replace faulty components

Related codes

P0B00 P0B02 P0B03