P2C38 — Cylinder Head Temperature Sensor B Circuit

What Does P2C38 Mean?

P2C38 is a diagnostic trouble code indicating: Cylinder Head Temperature Sensor B Circuit. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P2C38

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Cylinder Head Temperature Sensor B readings
⚠️ Related system operating intermittently
⚠️ System warning light illuminated

Common Causes

🔍 Wiring issue in Cylinder Head Temperature Sensor B circuit (damaged, chafed, or corroded)
🔍 Faulty Cylinder Head Temperature Sensor B connector or terminal
🔍 Failed Cylinder Head Temperature Sensor B
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P2C38 mean?

P2C38 indicates: Cylinder Head Temperature Sensor B Circuit. The vehicle's computer has detected that the Cylinder Head Temperature Sensor B is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P2C38?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P2C38 for extended periods may cause additional problems.

How much does it cost to fix P2C38?

Repair costs for P2C38 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and repair Cylinder Head Temperature Sensor B wiring and connectors
🔧 Replace faulty Cylinder Head Temperature Sensor B

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P2C38: Cylinder Head Temperature Sensor B Circuit