P242D 2014 GMC Sierra Code - Exhaust Gas Temperature Sensor 3 Circuit High Voltage
Quick Answer
The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 3, Exhaust Gas Temperature Sensor 3 harness is open or shorted, Exhaust Gas Temperature Sensor 3 circuit poor electrical connection. 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
- P242D 2014 GMC Sierra indicates Exhaust Gas Temperature Sensor 3 Circuit High Voltage.
- Common causes
- Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 3, Exhaust Gas Temperature Sensor 3 harness is open or shorted, Exhaust Gas Temperature Sensor 3 circuit poor electrical connection.
- 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.
Code P242D 2014 GMC Sierra Description
What are the Possible Causes of the DTC P242D 2014 GMC Sierra?
- Faulty Exhaust Gas Temperature Sensor (EGTS) 3
- Exhaust Gas Temperature Sensor 3 harness is open or shorted
- Exhaust Gas Temperature Sensor 3 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P242D 2014 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P242D 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P242D 2014 GMC Sierra Code
1. What does the OBDII code P242D mean on a 2014 GMC Sierra?
P242D indicates an issue with the Exhaust Gas Temperature (EGT) Sensor 3, specifically a high voltage reading from the sensor circuit.
2. What are the common symptoms of a P242D code on a 2014 GMC Sierra?
Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, and the vehicle possibly entering limp mode.
3. What causes the P242D code on a 2014 GMC Sierra?
Common causes include a faulty EGT sensor, damaged wiring or connectors in the sensor circuit, and, less commonly, issues with the vehicle’s powertrain control module (PCM).
4. Can I keep driving my 2014 GMC Sierra with a P242D code?
While it may be possible to continue driving, prolonged operation could lead to reduced performance or damage to the exhaust system. It’s best to address the issue promptly.
5. How do I fix the P242D code on a 2014 GMC Sierra?
Repairs may involve replacing the faulty EGT sensor, repairing or replacing damaged wiring or connectors, and clearing the code using an OBDII scanner.
6. How can I diagnose the P242D code on my 2014 GMC Sierra?
Use an OBDII scanner to verify the code, inspect the EGT sensor and its wiring for damage or corrosion, and test the sensor’s voltage output with a multimeter.
7. Where is Exhaust Gas Temperature Sensor 3 located on a 2014 GMC Sierra?
EGT Sensor 3 is typically located on the exhaust system, often near or after the Diesel Particulate Filter (DPF), depending on the engine configuration.
8. Can a dirty Diesel Particulate Filter cause a P242D code on a 2014 GMC Sierra?
A clogged DPF can lead to abnormal exhaust temperatures, potentially triggering issues with the EGT sensor, but the sensor itself is usually the primary cause.
9. How much does it cost to repair the P242D code on a 2014 GMC Sierra?
The cost can vary but typically ranges from $100 to $300 for parts and labor if the EGT sensor needs replacement.
10. Will clearing the code with an OBDII scanner fix the P242D issue?
Clearing the code will only reset the check engine light temporarily. If the underlying issue isn’t resolved, the code will likely return.
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