P05C2
Engine Coolant Pressure Sensor Circuit
Generic OBD-II
Common symptoms
What you'll notice
- Check the wiring and connections of the engine coolant pressure sensor
- Replace the engine coolant pressure sensor
- Inspect and repair any leaks in the coolant system
- Flush and refill the coolant system
Common causes
Most likely first
- Faulty engine coolant pressure sensor
- Low coolant level or leaks in the cooling system
- Blocked or restricted coolant flow
- Malfunctioning thermostat
How to diagnose & fix
Work through it in order
- Engine overheating
- Decreased fuel efficiency
- Illumination of the check engine light
- Poor engine performance/loss of power
- Hard starting or rough idling
Read & clear P05C2 yourself
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