P242B — Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 3

What Does P242B Mean?

P242B is a diagnostic trouble code indicating: Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 3. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P242B

⚠️ Check Engine Light (MIL) illuminated
⚠️ Exhaust Gas Temperature Sensor not operating within expected parameters
⚠️ Reduced efficiency or performance of related system
⚠️ Reduced engine performance

Common Causes

🔍 Exhaust Gas Temperature Sensor degraded or contaminated
🔍 Mechanical wear or binding in Exhaust Gas Temperature Sensor
🔍 Incorrect Exhaust Gas Temperature Sensor installed (wrong part number)
🔍 Related system mechanical issue affecting Exhaust Gas Temperature Sensor readings

Frequently Asked Questions

What does P242B mean?

P242B indicates: Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 3. The vehicle's computer has detected that the Exhaust Gas Temperature Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P242B?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P242B for extended periods may cause additional problems.

How much does it cost to fix P242B?

Repair costs for P242B typically range from $50 to $250, 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 clean Exhaust Gas Temperature Sensor
🔧 Replace degraded Exhaust Gas Temperature Sensor
🔧 Check for related mechanical issues affecting readings

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.

P242B: Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 3