P0B3A
Motor Electronics Coolant Pump B Control Circuit High
P0B3A is an OBD-II diagnostic trouble code meaning: Motor Electronics Coolant Pump B Control Circuit High. Common causes: cooling pump malfunction, open or short circuit in control circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Engine overheating
- Unstable cooling fan operation
- Reduced engine power
- Possible overheating messages on the instrument panel
Causes
- Cooling pump malfunction
- Open or short circuit in control circuit
- Pump relay or fuse problems
- Engine control unit (ECU) malfunction
- Oxidation of contacts in pump connectors
How to Fix
- Check fuses and pump relays
- Diagnose resistance and voltage in the control circuit
- Inspect connectors and wiring harness for damage
- Check the functionality of the cooling pump itself
- If necessary, replace the pump or repair the wiring
Related codes
Error P0B3A by Vehicle Brand
FAQ
What does the P0B3A code mean?
P0B3A is an OBD-II diagnostic trouble code that indicates: Motor Electronics Coolant Pump B Control Circuit High
What causes a P0B3A error code?
The most common causes of P0B3A include: Cooling pump malfunction; Open or short circuit in control circuit; Pump relay or fuse problems; Engine control unit (ECU) malfunction.
How do I fix a P0B3A diagnostic trouble code?
To fix P0B3A: Check fuses and pump relays. Diagnose resistance and voltage in the control circuit. Inspect connectors and wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0B3A?
Do not drive — repair immediately
How much does it cost to fix P0B3A?
The estimated repair cost for P0B3A is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat