P242E — Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 3

What Does P242E Mean?

P242E is a diagnostic trouble code indicating: Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic 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 P242E

⚠️ Check Engine Light (MIL) illuminated
⚠️ Exhaust Gas Temperature Sensor signal cutting in and out
⚠️ Related system working sometimes but not consistently
⚠️ Reduced engine performance

Common Causes

🔍 Loose or intermittent connection at Exhaust Gas Temperature Sensor
🔍 Wire chafing causing intermittent contact
🔍 Exhaust Gas Temperature Sensor failing under heat or vibration
🔍 Corroded connector pins with partial contact

Frequently Asked Questions

What does P242E mean?

P242E indicates: Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic 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 P242E?

Yes, P242E is generally safe to drive with in the short term. However, it should still be addressed to pass emissions testing and prevent potential secondary issues.

How much does it cost to fix P242E?

Repair costs for P242E typically range from $30 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 reseat all Exhaust Gas Temperature Sensor connectors
🔧 Repair chafed or damaged wiring in Exhaust Gas Temperature Sensor circuit
🔧 Replace Exhaust Gas Temperature Sensor if failing intermittently

1
Find your vehicle above
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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.

P242E: Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 3