Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks the sensor that checks the pressure of the engine's coolant is getting too much electricity, like it's plugged in too hard.
The P05C5 code is triggered when the Engine Control Module (ECM) detects a high voltage signal from the engine coolant pressure sensor circuit.
The engine coolant pressure sensor monitors the pressure of the coolant in the engine cooling system. If the sensor circuit sends a voltage signal to the ECM that is higher than the expected range, the P05C5 code is set. This could be due to a sensor malfunction, wiring issue, or ECM fault.
• Check Engine Light illuminated
• Possible engine overheating
• Erratic temperature gauge readings
• Faulty engine coolant pressure sensor
• Wiring issues such as short circuits or poor connections
• Faulty ECM
ECM: Engine Control Module, the computer that manages engine functions.
OBD-II: On-Board Diagnostics, a standardized system for vehicle self-diagnostics.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the engine coolant pressure sensor.
• Test the engine coolant pressure sensor for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the engine coolant pressure sensor if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regular maintenance of the cooling system
• Inspect and replace sensors as needed
• Ensure proper coolant levels
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Regularly check coolant levels to prevent overheating.
Check with your vehicle manufacturer for warranty coverage on sensors and ECM.
This code is relatively uncommon and typically associated with newer vehicle models equipped with advanced monitoring systems.
Moderate – Addressing this issue promptly can prevent engine overheating.
Driving with an illuminated Check Engine Light can lead to further damage and may not comply with emissions regulations.
• Engine at operating temperature
• Stable electrical system voltage
The engine coolant pressure sensor is typically located near the engine's coolant passages or radiator.
Q: Can I drive with a P05C5 code?
A: It's not recommended to drive for extended periods with this code, as it could lead to engine overheating.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code after the repair is completed.
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