P0B09

Electric/Auxiliary Transmission Fluid Pump A Motor Supply Voltage Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

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

Causes

Broken wires in the pump power circuit
Pump motor malfunction
Relay or fuse problems
Oxidation or damage to contacts
Transmission control unit malfunction

How to Fix

Check the pump circuit fuses and relays
Inspect the wiring harness for damage
Check the voltage at the pump terminals
Test the operation of the pump motor
If necessary, replace the pump or damaged wires

Related codes

P0B0A P0B0B P0B0C