P242D 2016 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 2016 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 2016 GMC Sierra Description
What are the Possible Causes of the DTC P242D 2016 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 2016 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 2016 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 2016 GMC Sierra Code
1. What does the OBDII code P242D mean on a 2016 GMC Sierra?
P242D indicates a high voltage issue in the circuit for the Exhaust Gas Temperature (EGT) Sensor 3, which monitors exhaust gas temperatures to optimize emissions and engine performance.
2. What are the common symptoms of code P242D on a 2016 GMC Sierra?
Symptoms may include the check engine light turning on, decreased fuel efficiency, poor engine performance, or the vehicle entering limp mode.
3. What causes the P242D code to appear on my 2016 GMC Sierra?
Common causes include a faulty EGT sensor, damaged wiring or connectors, a short circuit in the sensor circuit, or an issue with the powertrain control module (PCM).
4. Can I drive my 2016 GMC Sierra with a P242D code?
While the vehicle may still be drivable, prolonged operation with this code can lead to increased emissions, reduced performance, or further damage to the exhaust or emissions systems.
5. How can I diagnose the P242D code on my 2016 GMC Sierra?
Diagnosis may involve using an OBDII scanner to confirm the code, visually inspecting the EGT sensor and wiring for damage, and testing the sensor’s resistance and voltage output with a multimeter.
6. How is the P242D code fixed on a 2016 GMC Sierra?
Repairs may include replacing the faulty EGT sensor, repairing or replacing damaged wiring or connectors, or, in rare cases, reprogramming or replacing the PCM.
7. How much does it cost to fix the P242D code on a 2016 GMC Sierra?
The cost typically ranges from $150 to $400, depending on whether the EGT sensor needs replacement or if additional repairs are required for wiring or the PCM.
8. Can a dirty or clogged exhaust system cause the P242D code?
While less common, excessive soot or debris in the exhaust system can affect the EGT sensor’s performance and potentially trigger this code.
9. What tools are needed to troubleshoot the P242D code on a 2016 GMC Sierra?
You will need an OBDII scanner, a multimeter to check voltage and resistance, and possibly a wiring diagram for the EGT sensor circuit.
10. Will clearing the P242D code solve the problem on a 2016 GMC Sierra?
Clearing the code may turn off the check engine light temporarily, but if the underlying issue isn’t addressed, the code is likely to return.
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