P05C2
Engine Coolant Pressure Sensor Circuit
A general circuit fault is detected on the engine coolant pressure sensor - used to detect a pressurised coolant system that has lost pressure (cap, hose, head gasket leak) or is over-pressurised (combustion gases entering coolant).
A general circuit fault is detected on the engine coolant pressure sensor - used to detect a pressurised coolant system that has lost pressure (cap, hose, head gasket leak) or is over-pressurised (combustion gases entering coolant).
Common causes
- high
Open in sensor or wiring
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-330
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P05C2 mean?
P05C2 means "Engine Coolant Pressure Sensor Circuit". It is a generic OBD-II code that points to a fault in the vehicle speed, idle control, auxiliary inputs.
What are the most common causes of P05C2?
open in sensor or wiring — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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