Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a sensor that checks how hot the engine is. This code means that the sensor is not working right or is not connected properly.
The P2C38 code is triggered when the Engine Control Module (ECM) detects a problem with the Cylinder Head Temperature Sensor B circuit.
The Cylinder Head Temperature (CHT) Sensor B measures the temperature of the engine's cylinder head. This information is used by the ECM to adjust engine parameters for optimal performance and emissions. A fault in the sensor or its circuit can lead to incorrect temperature readings, affecting engine performance.
• Check Engine Light is on
• Poor engine performance
• Increased fuel consumption
• Faulty Cylinder Head Temperature Sensor B
• Damaged wiring or connectors in the sensor circuit
• ECM malfunction
ECM: Engine Control Module, the computer that controls the engine's functions.
CHT Sensor: Cylinder Head Temperature Sensor, a device that measures the temperature of the engine's cylinder head.
• Use an OBD-II scanner to confirm the P2C38 code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the Cylinder Head Temperature Sensor B for proper operation.
• Replace the Cylinder Head Temperature Sensor B if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain engine sensors.
• Inspect wiring and connectors during routine maintenance.
• Ensure the engine cooling system is functioning properly.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Regular maintenance can prevent sensor issues.
Sensor-related repairs may be covered under the vehicle's powertrain warranty.
This code has been associated with sensor failures in vehicles with high mileage or poor maintenance history.
Moderate – It should be addressed soon to prevent further engine issues.
Driving with a faulty temperature sensor can lead to engine overheating, which may cause severe damage.
• Engine at operating temperature
• Vehicle in park or neutral
The Cylinder Head Temperature Sensor B is typically located on the cylinder head, near the engine block.
Q: Can I drive with a P2C38 code?
A: It's not recommended to drive for long periods with this code, as it can 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, or disconnect the battery for a few minutes to reset the system.
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