P01BA
Engine Oil Temperature Sensor B Range/Performance
Generic OBD-II
Common symptoms
What you'll notice
- Check the wiring and connections of the engine oil temperature sensor
- Replace the engine oil temperature sensor
- Inspect and replace the engine oil if necessary
- Check the engine coolant level and ensure it is at the correct level
- Verify the functionality of the engine cooling system components
Common causes
Most likely first
- Faulty engine oil temperature sensor
- Low engine oil level
- Engine oil contamination or degradation
- Faulty thermostat
- Faulty engine control module
How to diagnose & fix
Work through it in order
- Check engine light illuminates on dashboard
- Inaccurate temperature readings displayed on the vehicle's temperature gauge
- Engine overheating or excessively high engine oil temperature
- Engine running rough or misfiring
- Reduced engine performance or power
Read & clear P01BA yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.