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 is not getting the right temperature reading from a sensor on the engine. It's like when your thermometer at home says it's really hot, but you feel cold.
The code P2C39 is triggered when the Engine Control Module (ECM) detects an out-of-range or performance issue with the Cylinder Head Temperature Sensor B.
The Cylinder Head Temperature Sensor B is responsible for monitoring the temperature of the engine's cylinder head. This sensor helps the ECM manage engine performance and emissions. If the sensor's readings are outside the expected range or inconsistent, it can affect engine operation.
• Check Engine Light is on
• Engine may run rough
• Poor fuel economy
• Possible overheating
• Faulty Cylinder Head Temperature Sensor B
• Wiring issues such as shorts or open circuits
• Poor electrical connections
• ECM issues
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors for damage
• Test the sensor with a multimeter
• Check the ECM for any faults
• Replace the Cylinder Head Temperature Sensor B
• Repair or replace damaged wiring or connectors
• Reset the ECM to clear the code
• Perform a test drive to ensure the issue is resolved
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance checks
• Inspect wiring for wear and tear
• Ensure sensors are clean and functioning
Sensor Issue
• Have the vehicle inspected by a professional
• Do not ignore the Check Engine Light
• Avoid driving the vehicle hard until the issue is resolved
Check with your vehicle manufacturer for specific warranty coverage on sensors.
This code has been associated with sensor malfunctions in various vehicle models over the years.
Moderate – Address the issue soon to prevent potential engine damage.
Ignoring this code may lead to engine overheating, which can cause severe damage.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The Cylinder Head Temperature Sensor B is typically located on the engine's cylinder head.
Q: Can I drive with a P2C39 code?
A: It's not recommended to drive for long periods with this code, as it may lead to engine overheating.
Q: How do I reset the Check Engine Light after repair?
A: You can reset the light using an OBD-II scanner after addressing the issue.
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