P01BB
Engine Oil Temperature Sensor B Circuit Low
Generic OBD-II
Common symptoms
What you'll notice
- Check the engine oil level and ensure it is at the correct level.
- Inspect the engine oil temperature sensor for any damage or corrosion and replace if necessary.
- Test the wiring and connections related to the engine oil temperature sensor for any faults or breaks.
- Ensure that the engine cooling system is functioning properly and there are no coolant leaks.
- If all else fails, consider replacing the engine oil temperature sensor with a new one.
Common causes
Most likely first
- Faulty engine oil temperature sensor
- Wiring issues or a poor connection in the engine oil temperature sensor circuit
- Low engine oil level or degraded engine oil
- Engine coolant temperature sensor malfunction
- Engine control module (ECM) or powertrain control module (PCM) failure
How to diagnose & fix
Work through it in order
- Engine temperature gauge reading unusually low or fluctuating
- Engine stalling or difficulty starting when the engine is cold
- Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) illuminates on the dashboard
- Decreased fuel efficiency or increased fuel consumption
- Engine overheating or rapid temperature changes
Read & clear P01BB yourself
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