P0C22

Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Unstable gear shifting
Transmission warning light comes on
Deterioration in acceleration dynamics
Noises or humming from the transmission

Causes

Pump motor malfunction
Damage to the pump phase circuit
Open or poor contact in the wiring harness
Problems with the transmission control unit
Mechanical pump failure

How to Fix

Diagnostics of the U-V-W phase circuit of the pump
Checking the resistance of the motor windings
Inspect the wiring harness and connections
Replacing a faulty pump if necessary
Resetting errors and checking system operation

Related codes

P0C21 P0C23 P0C24