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 getting a signal that the temperature sensor in the engine is reading too high. It's like a thermometer in your car's engine is saying it's too hot, even if it might not be.
The P2C3B code is triggered when the Engine Control Module (ECM) detects a high voltage signal from the Cylinder Head Temperature Sensor B, indicating a higher than normal temperature reading.
The Cylinder Head Temperature (CHT) Sensor B is responsible for monitoring the temperature of the engine's cylinder head. The ECM uses this data to adjust fuel mixture, ignition timing, and other engine parameters. A 'Circuit High' condition indicates that the sensor is sending a voltage signal that is higher than the expected range, suggesting a possible short circuit or sensor malfunction.
• Check Engine Light illuminated
• Poor engine performance
• Engine overheating
• Faulty Cylinder Head Temperature Sensor B
• Wiring issues such as a short circuit or open circuit
• Faulty ECM
ECM: Engine Control Module
CHT Sensor: Cylinder Head Temperature Sensor
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the Cylinder Head Temperature Sensor B for proper operation.
• Replace the faulty Cylinder Head Temperature Sensor B.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect engine wiring and connectors.
• Ensure proper engine cooling system maintenance.
• Replace sensors at recommended intervals.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if overheating is suspected.
Sensor-related repairs may be covered under the vehicle's powertrain warranty if applicable.
This code has been associated with sensor malfunctions and wiring issues in various vehicle models.
Moderate – Addressing this issue promptly can prevent engine damage.
Driving with a malfunctioning temperature sensor can lead to engine overheating and potential safety hazards.
• Engine at operating temperature
• Vehicle stationary
The Cylinder Head Temperature Sensor B is typically located on the engine cylinder head, often near the intake manifold.
Q: Can I drive with a P2C3B 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 repair?
A: You can use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.