P242E GMC Code - Exhaust Gas Temperature Sensor 3 Circuit Intermittent
Quick Answer
The P242E GMC code indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 3 circuit, specifically an intermittent issue. Common causes include Faulty Exhaust Gas Temperature Sensor 3, Wiring harness issues or corrosion, Poor electrical connection between the sensor and ECM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P242E GMC indicates Exhaust Gas Temperature Sensor 3 Circuit Intermittent.
- Common causes
- Common causes include Faulty Exhaust Gas Temperature Sensor 3, Wiring harness issues or corrosion, Poor electrical connection between the sensor and ECM.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P242E GMC Description
The P242E GMC code indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 3 circuit, specifically an intermittent issue. The Exhaust Gas Temperature Sensor measures the temperature of the exhaust gases leaving the engine and sends this information to the engine control module (ECM) to help regulate fuel injection timing and optimize fuel efficiency. An intermittent circuit issue means that there is a sporadic disruption in the communication between the sensor and the ECM, which can lead to inaccurate temperature readings and improper fuel mixture adjustments.
Common Causes of P242E GMC
- Faulty Exhaust Gas Temperature Sensor 3
- Wiring harness issues or corrosion
- Poor electrical connection between the sensor and ECM
- ECM software glitch or malfunction
- Exhaust system leaks or damage
Symptoms of P242E GMC
- Check engine light illuminated on the dashboard
- Decreased fuel efficiency
- Engine hesitation or stalling
- Rough idling or engine shaking
- Increased emissions output
How to Fix P242E GMC
- Begin by connecting a diagnostic scan tool to the vehicle's OBD-II port to retrieve the specific fault code and confirm the issue.
- Inspect the wiring harness and electrical connections related to the Exhaust Gas Temperature Sensor 3 for any signs of damage, corrosion, or loose connections.
- Test the sensor itself using a multimeter to check for proper resistance values and functionality.
- If the sensor is faulty, replace it with a new, OEM-quality sensor and ensure proper installation and calibration.
- Clear the fault code from the ECM's memory using the diagnostic scan tool and perform a test drive to verify that the issue has been resolved.
Cost to Fix P242E GMC
The cost of repairing a P242E GMC code related to the Exhaust Gas Temperature Sensor 3 circuit intermittent issue can vary depending on the root cause of the problem and the labor rates in your area. In general, the cost of parts for a new sensor can range from $100 to $200, while the labor cost for diagnosis and repair can add another $100 to $300. Overall, you can expect the total repair cost to be in the range of $200 to $500. It's important to note that these estimates are approximate, and actual costs may differ based on your specific vehicle make and model, as well as the rates charged by your chosen auto repair shop.
Need more information about the P242E GMC code?
Need more information on how to fix the P242E GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P242E GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P242E GMC Code
1. What are the common symptoms of OBDII code P242E GMC?
The common symptoms of code P242E GMC include decreased fuel efficiency, reduced engine performance, and the illumination of the Check Engine Light.
2. What are the possible causes of OBDII code P242E GMC?
The possible causes of code P242E GMC include a faulty exhaust gas temperature sensor, wiring issues, a poor electrical connection, or a malfunctioning engine control module (ECM).
3. How can I diagnose OBDII code P242E GMC?
Diagnosing code P242E GMC involves using an OBDII scanner to retrieve the code, checking the exhaust gas temperature sensor's wiring and connections, and testing the sensor's functionality using a multimeter.
4. How do I repair OBDII code P242E GMC?
To repair code P242E GMC, you may need to replace the exhaust gas temperature sensor, repair any damaged wiring or connections, reset the ECM, and clear the fault code using an OBDII scanner.
5. Can I drive my vehicle with OBDII code P242E GMC?
It is not recommended to drive your vehicle with code P242E GMC present, as it can lead to further damage and potential safety hazards due to incorrect engine performance.
6. How much does it cost to fix OBDII code P242E GMC?
The cost to fix code P242E GMC can vary depending on the cause of the issue, but it typically ranges from $100 to $300 for parts and labor.
7. Will resetting the Check Engine Light resolve OBDII code P242E GMC?
Resetting the Check Engine Light may temporarily turn it off, but it will not fix the underlying issue causing code P242E GMC. Proper diagnosis and repair are necessary to resolve the problem.
8. How long does it take to repair OBDII code P242E GMC?
The repair time for code P242E GMC can vary depending on the extent of the issue and the availability of parts. In general, it can take anywhere from 1 to 3 hours to diagnose and repair the problem.
9. Can a DIY enthusiast fix OBDII code P242E GMC?
While some DIY enthusiasts may have the skills and tools to diagnose and repair code P242E GMC, it is recommended to consult a professional mechanic for a proper diagnosis and repair to ensure the issue is resolved correctly.
10. Is OBDII code P242E GMC a common issue in GMC vehicles?
Code P242E GMC related to the Exhaust Gas Temperature Sensor 3 Circuit Intermittent is not as common as some other OBDII codes, but it can still occur in GMC vehicles, particularly in models equipped with this sensor.
Discuss the causes and fixes for P242E GMC OBDII Code
Code P242E GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.