P0A05
Motor Electronics Coolant Pump A Control Circuit/Open
P0A05 is an OBD-II diagnostic trouble code meaning: Motor Electronics Coolant Pump A Control Circuit/Open. Common causes: broken wire in the pump control circuit, pump relay fault. Estimated repair cost: $56–278.
Symptoms
- Overheat warning on dashboard
- Reduced engine power
- Hot engine compartment
- Unusual pump noises
- Check Engine Light Is On
Causes
- Broken wire in the pump control circuit
- Pump relay fault
- Pump motor failure
- Connector problems or corrosion
- Engine control unit malfunction
How to Fix
- Check the coolant pump fuse
- Check the integrity of the wires in the control circuit
- Check the operation of the pump relay
- Check the pump itself for faults
- If necessary, replace the cooling pump
Related codes
Error P0A05 by Vehicle Brand
FAQ
What does the P0A05 code mean?
P0A05 is an OBD-II diagnostic trouble code that indicates: Motor Electronics Coolant Pump A Control Circuit/Open
What causes a P0A05 error code?
The most common causes of P0A05 include: Broken wire in the pump control circuit; Pump relay fault; Pump motor failure; Connector problems or corrosion.
How do I fix a P0A05 diagnostic trouble code?
To fix P0A05: Check the coolant pump fuse. Check the integrity of the wires in the control circuit. Check the operation of the pump relay. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0A05?
Do not drive — repair immediately
How much does it cost to fix P0A05?
The estimated repair cost for P0A05 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat