P0E50
Motor Electronics Coolant Pump B Control Circuit Intermittent/Erratic
Generic OBD-II
Common symptoms
What you'll notice
- Check the coolant pump wiring for any loose connections or damaged wires.
- Inspect the coolant pump relay and replace if necessary.
- Test and replace the coolant pump if it is found to be faulty.
- Consult the car/motorcycle manufacturer's technical service bulletin (TSB) for any known issues or recommended fixes related to this error code.
Common causes
Most likely first
- Faulty motor electronics coolant pump
- Loose or corroded wiring connections in the coolant pump circuit
- Malfunctioning coolant pump control circuit
- Low coolant level
- Defective coolant temperature sensor
How to diagnose & fix
Work through it in order
- Motor electronics overheating
- Poor performance
Read & clear P0E50 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.