P0B3A
Motor Electronics Coolant Pump B Control Circuit High
Generic OBD-II
Common symptoms
What you'll notice
- Check the coolant level and make sure it is at the proper level.
- Inspect the wiring and connections related to the motor electronics coolant pump B control circuit for any damage or loose connections.
- Test the motor electronics coolant pump B for proper functioning and replace if necessary.
- Check the coolant temperature sensor for proper operation and replace if faulty.
- Reset the error code and monitor the system for any recurring issues.
Common causes
Most likely first
- Faulty motor electronics coolant pump
- Wiring or connector issue in the coolant pump control circuit
- Malfunctioning coolant temperature sensor
- Coolant pump relay malfunction
How to diagnose & fix
Work through it in order
- Motor performance affected
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