P242C 2016 GMC Sierra Code - Exhaust Gas Temperature Sensor 3 Circuit Low Voltage
Quick Answer
The P242C diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 3 Circuit, specifically a low voltage condition. Common causes include Faulty EGT Sensor: The EGT Sensor 3 may be malfunctioning, sending a low voltage signal to the ECM, Wiring Issues: There could be a wiring problem such as a short circuit or open circuit in the EGT Sensor 3 Circuit, ECM Malfunction: A malfunction in the engine control module could be causing incorrect readings from the EGT Sensor. 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
- P242C 2016 GMC Sierra indicates Exhaust Gas Temperature Sensor 3 Circuit Low Voltage.
- Common causes
- Common causes include Faulty EGT Sensor: The EGT Sensor 3 may be malfunctioning, sending a low voltage signal to the ECM, Wiring Issues: There could be a wiring problem such as a short circuit or open circuit in the EGT Sensor 3 Circuit, ECM Malfunction: A malfunction in the engine control module could be causing incorrect readings from the EGT Sensor.
- 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 P242C 2016 GMC Sierra Description
The P242C diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 3 Circuit, specifically a low voltage condition. The EGT sensor is responsible for monitoring the temperature of the exhaust gases leaving the engine. This information is crucial for the engine control module (ECM) to adjust fuel delivery and timing to optimize performance and emissions.
Common Causes of P242C 2016 GMC Sierra
- Faulty EGT Sensor: The EGT Sensor 3 may be malfunctioning, sending a low voltage signal to the ECM.
- Wiring Issues: There could be a wiring problem such as a short circuit or open circuit in the EGT Sensor 3 Circuit.
- ECM Malfunction: A malfunction in the engine control module could be causing incorrect readings from the EGT Sensor.
- Exhaust System Leak: A leak in the exhaust system before the EGT Sensor could lead to inaccurate temperature readings.
- Sensor Placement: Incorrect placement of the EGT Sensor or physical damage to the sensor could trigger the low voltage condition.
Symptoms of P242C 2016 GMC Sierra
- Check Engine Light: The most common symptom associated with the P242C code is the illumination of the check engine light on the vehicle's dashboard.
- Reduced Engine Performance: The vehicle may experience a decrease in power and acceleration due to the ECM's inability to adjust fuel delivery accurately.
- Poor Fuel Efficiency: A low voltage condition in the EGT Sensor 3 Circuit can lead to inefficient fuel combustion, resulting in decreased fuel economy.
- Rough Idle: The engine may idle roughly or inconsistently due to improper fuel delivery and timing adjustments.
- Increased Emissions: The vehicle may produce higher levels of harmful emissions, potentially causing it to fail emissions tests.
How to Fix P242C 2016 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the DTC and perform a thorough inspection of the EGT Sensor 3 Circuit and related components.
- Test the EGT Sensor: Check the EGT Sensor 3 for proper operation using a multimeter to verify voltage readings.
- Inspect Wiring: Inspect the wiring harness for any damage, corrosion, or loose connections that could be causing the low voltage condition.
- Replace EGT Sensor: If the sensor is faulty, replace it with a new, OEM-quality sensor and ensure proper installation.
- Clear DTC: Clear the DTC from the ECM using a diagnostic scanner after completing the repair to reset the check engine light.
Cost to Fix P242C 2016 GMC Sierra
The cost of repairing a P242C code on a 2016 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the cost of replacing an EGT Sensor can range from $100 to $300, including parts and labor. Additional costs may apply if there are wiring issues or other components that need to be replaced. It's recommended to consult with a trusted mechanic or dealership to get an accurate estimate based on your vehicle's specific needs and location. Keep in mind that labor rates can vary between different repair shops, so it's advisable to shop around for the best price.
Tech Notes for P242C 2016 GMC Sierra
Need more information about the P242C 2016 GMC Sierra code?
Need more information on how to fix the P242C 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P242C 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P242C 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code P242C in a 2016 GMC Sierra?
The common symptoms of code P242C include poor engine performance, reduced fuel efficiency, and illumination of the check engine light.
2. What can cause the Exhaust Gas Temperature Sensor 3 Circuit Low Voltage error in a 2016 GMC Sierra?
Potential causes of code P242C in a 2016 GMC Sierra include a faulty exhaust gas temperature sensor, damaged wiring or connectors, or issues with the sensor circuit.
3. How serious is the P242C code in a 2016 GMC Sierra?
While the P242C code is not considered an emergency, it should be addressed promptly to prevent potential damage to the engine or catalytic converter.
4. Can I continue driving my 2016 GMC Sierra with the P242C code present?
It is not recommended to drive your vehicle with the P242C code active, as it can lead to further issues and increased emissions.
5. How can I diagnose the Exhaust Gas Temperature Sensor 3 Circuit Low Voltage error in my 2016 GMC Sierra?
Diagnosing code P242C typically requires a professional OBDII scanner to retrieve the specific fault code and inspecting the exhaust gas temperature sensor and related components.
6. Is it possible to repair the P242C code in a 2016 GMC Sierra myself?
While some may attempt DIY repairs, it is advisable to seek assistance from a qualified mechanic to properly diagnose and repair the underlying issue causing code P242C.
7. What are some general repair tips for fixing the Exhaust Gas Temperature Sensor 3 Circuit Low Voltage error in a 2016 GMC Sierra?
Repair tips for resolving code P242C may include checking and cleaning sensor connectors, replacing the exhaust gas temperature sensor, or repairing damaged wiring.
8. Will resetting the OBDII system clear the P242C code in a 2016 GMC Sierra?
Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code P242C is not addressed, the error is likely to reappear.
9. How much does it typically cost to repair the P242C code in a 2016 GMC Sierra?
The cost of repairing code P242C can vary depending on the specific issue causing the error, the required parts, and labor costs. It is recommended to obtain quotes from different mechanics.
10. Can the P242C code in a 2016 GMC Sierra cause any long-term damage if left unaddressed?
Continued driving with the P242C code unresolved can potentially lead to increased emissions, reduced engine performance, and possible damage to the catalytic converter over time.
Discuss the causes and fixes for P242C 2016 GMC Sierra OBDII Code
Code P242C 2016 GMC Sierra 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.