P118F 2015 GMC Sierra Code - Exhaust Gas Temperature Sensor 2 Performance Engine Running
Quick Answer
The exhaust gas temperature sensors are variable resistors that measure the temperature of the exhaust gas. Common causes include Faulty Exhaust Gas Temperature Sensor, Exhaust Gas Temperature Sensor harness is open or shorted, Exhaust Gas Temperature Sensor 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
- P118F 2015 GMC Sierra indicates Exhaust Gas Temperature Sensor 2 Performance Engine Running.
- Common causes
- Common causes include Faulty Exhaust Gas Temperature Sensor, Exhaust Gas Temperature Sensor harness is open or shorted, Exhaust Gas Temperature Sensor 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 P118F 2015 GMC Sierra Description
What are the Possible Causes of the DTC P118F 2015 GMC Sierra?
- Faulty Exhaust Gas Temperature Sensor
- Exhaust Gas Temperature Sensor harness is open or shorted
- Exhaust Gas Temperature Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P118F 2015 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P118F 2015 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.
Need more information about the P118F 2015 GMC Sierra code?
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Frequently Asked Questions about P118F 2015 GMC Sierra Code
1. What does the OBDII code P118F mean on a 2015 GMC Sierra?
P118F indicates an issue with the performance of Exhaust Gas Temperature (EGT) Sensor 2 while the engine is running. This sensor monitors exhaust temperatures to ensure proper emissions control.
2. What are the common symptoms of code P118F on a 2015 GMC Sierra?
Symptoms may include reduced engine performance, increased fuel consumption, the check engine light turning on, and potential difficulty meeting emissions standards.
3. What causes the P118F code to be triggered?
Common causes include a faulty EGT sensor 2, wiring or connector issues, excessive soot buildup in the exhaust system, or a failed exhaust component such as the diesel particulate filter (DPF).
4. Can I drive my 2015 GMC Sierra with the P118F code?
Driving with the P118F code is not recommended as it may cause further damage to the exhaust system or engine and could result in poor fuel economy and emissions performance.
5. How do you diagnose the P118F code on a 2015 GMC Sierra?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting the wiring and connectors for damage, testing the EGT sensor with a multimeter, and checking for soot buildup or blockages in the exhaust system.
6. How can I fix the P118F code on my 2015 GMC Sierra?
Repairs may include replacing the faulty EGT sensor, cleaning or replacing clogged components like the DPF, repairing damaged wiring, or updating the vehicle’s engine control module (ECM software).
7. What tools are needed to troubleshoot the P118F code?
You’ll need an OBDII scanner, a multimeter to check sensor resistance, and basic tools to inspect and replace sensors or wiring.
8. How much does it cost to repair the P118F code on a 2015 GMC Sierra?
The cost varies depending on the repair. Replacing the EGT sensor typically costs $100-$300, while addressing issues with the DPF or wiring may be more expensive.
9. Can a bad EGT sensor damage my 2015 GMC Sierra’s engine?
Yes, a faulty EGT sensor can lead to incorrect exhaust temperature readings, which may cause improper engine operation and potential damage to the DPF or turbocharger over time.
10. Is the P118F code covered under warranty for a 2015 GMC Sierra?
This depends on your vehicle’s warranty. Emission-related components like EGT sensors may be covered under federal emission warranties, but you should check with your dealer for specifics.
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