P2C3B
Cylinder Head Temperature Sensor B Circuit High
The ECM detects a circuit high fault on the cylinder head temperature sensor b circuit. Reading cannot be used reliably for control.
The ECM detects a circuit high fault on the cylinder head temperature sensor b circuit. Reading cannot be used reliably for control.
Common causes
- high
Signal wire shorted to B+
One of the most commonly reported causes for this code — check this first.
Typical part cost: $60-280
- medium
Open sensor
A plausible cause — test and verify before replacing parts.
Typical part cost: $60-280
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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
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Frequently asked questions
What does P2C3B mean?
P2C3B means "Cylinder Head Temperature Sensor B Circuit High". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2C3B?
signal wire shorted to b+; open sensor; connector pins corroded - high contact resistance — 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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