P0B09
Electric/Auxiliary Transmission Fluid Pump A Motor Supply Voltage Circuit/Open
P0B09 is an OBD-II diagnostic trouble code meaning: Electric/Auxiliary Transmission Fluid Pump A Motor Supply Voltage Circuit/Open. Common causes: broken wires in the pump power circuit, pump motor malfunction. Estimated repair cost: $56–167.
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
Error P0B09 by Vehicle Brand
FAQ
What does the P0B09 code mean?
P0B09 is an OBD-II diagnostic trouble code that indicates: Electric/Auxiliary Transmission Fluid Pump A Motor Supply Voltage Circuit/Open
What causes a P0B09 error code?
The most common causes of P0B09 include: Broken wires in the pump power circuit; Pump motor malfunction; Relay or fuse problems; Oxidation or damage to contacts.
How do I fix a P0B09 diagnostic trouble code?
To fix P0B09: Check the pump circuit fuses and relays. Inspect the wiring harness for damage. Check the voltage at the pump terminals. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0B09?
Limited driving only, diagnose soon
How much does it cost to fix P0B09?
The estimated repair cost for P0B09 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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