P01E4
Engine Coolant Temperature Sensor 3 Circuit Range/Performance
Generic OBD-II
Common symptoms
What you'll notice
- Check and replace the engine coolant temperature sensor
- Inspect and repair any damaged wiring or connectors related to the sensor
- Flush and refill the engine coolant to ensure proper temperature regulation
- Perform a thorough inspection of the cooling system for any leaks or blockages
- Reset the OBD2 error code and monitor the vehicle's performance to ensure the issue has been resolved
Common causes
Most likely first
- Faulty engine coolant temperature sensor
- Low engine coolant level
- Malfunctioning thermostat
- Problems with the cooling system
- Faulty engine control module (ECM)
How to diagnose & fix
Work through it in order
- Engine overheating
- Decreased fuel efficiency
- Rough idling or stalling
- Increased emissions
- Poor performance or loss of power
Read & clear P01E4 yourself
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