P118E 2017 GMC Sierra Code - Exhaust Gas Temperature Sensor 1 Performance Engine Running
Quick Answer
The P118E diagnostic trouble code (DTC) for a 2017 GMC Sierra refers to a problem with the Exhaust Gas Temperature Sensor 1 Performance Engine Running. Common causes include Faulty Exhaust Gas Temperature Sensor: The most common cause of the P118E code is a malfunctioning or damaged Exhaust Gas Temperature Sensor 1, Wiring Issues: Corrosion, damage, or loose connections in the wiring harness connected to the sensor can also trigger this code, Sensor Contamination: The sensor may become contaminated with carbon buildup or other debris, affecting its performance. 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
- P118E 2017 GMC Sierra indicates Exhaust Gas Temperature Sensor 1 Performance Engine Running.
- Common causes
- Common causes include Faulty Exhaust Gas Temperature Sensor: The most common cause of the P118E code is a malfunctioning or damaged Exhaust Gas Temperature Sensor 1, Wiring Issues: Corrosion, damage, or loose connections in the wiring harness connected to the sensor can also trigger this code, Sensor Contamination: The sensor may become contaminated with carbon buildup or other debris, affecting its performance.
- 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 P118E 2017 GMC Sierra Description
The P118E diagnostic trouble code (DTC) for a 2017 GMC Sierra refers to a problem with the Exhaust Gas Temperature Sensor 1 Performance Engine Running. This sensor is responsible for monitoring the temperature of the exhaust gas as it exits the engine. The information gathered by this sensor is crucial for the engine control module (ECM) to adjust fuel delivery and optimize combustion efficiency. When the ECM detects a performance issue with this sensor while the engine is running, it triggers the P118E code.
Common Causes of P118E 2017 GMC Sierra
- Faulty Exhaust Gas Temperature Sensor: The most common cause of the P118E code is a malfunctioning or damaged Exhaust Gas Temperature Sensor 1.
- Wiring Issues: Corrosion, damage, or loose connections in the wiring harness connected to the sensor can also trigger this code.
- Sensor Contamination: The sensor may become contaminated with carbon buildup or other debris, affecting its performance.
- ECM Issues: Problems with the engine control module or related components could also contribute to the P118E code.
Symptoms of P118E 2017 GMC Sierra
- Check Engine Light: The most common symptom associated with the P118E code is the illumination of the check engine light on the vehicle's dashboard.
- Decreased Fuel Efficiency: A faulty Exhaust Gas Temperature Sensor 1 can lead to poor fuel efficiency as the ECM struggles to adjust fuel delivery accurately.
- Rough Idle: The engine may run rough or have an irregular idle when the sensor is not functioning properly.
- Loss of Power: The vehicle may experience a loss of power or acceleration due to incorrect fuel delivery based on faulty sensor readings.
How to Fix P118E 2017 GMC Sierra
- Diagnose the Issue: Use a diagnostic scan tool to retrieve the specific DTC, check the sensor's performance, inspect wiring connections, and verify ECM functionality.
- Replace the Exhaust Gas Temperature Sensor: If the sensor is found to be faulty, replace it with a new OEM or high-quality aftermarket sensor.
- Repair Wiring: If wiring issues are identified, repair or replace any damaged wires or connectors to ensure a secure connection.
- Clear Codes and Test Drive: After making repairs, clear the DTC from the ECM memory, reset the check engine light, and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P118E 2017 GMC Sierra
The typical repair costs for addressing a P118E code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of replacing the Exhaust Gas Temperature Sensor 1 and addressing related wiring issues can range from $200 to $500, including parts and labor. However, it's important to note that diagnosis time, parts prices, and labor rates can vary between auto repair shops. It's recommended to obtain quotes from multiple shops to get a more accurate estimate for your specific situation.
Need more information about the P118E 2017 GMC Sierra code?
Need more information on how to fix the P118E 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P118E 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P118E 2017 GMC Sierra Code
1. What does the OBDII code P118E mean on a 2017 GMC Sierra?
P118E refers to an issue with the Exhaust Gas Temperature (EGT) Sensor 1, indicating a performance problem when the engine is running.
2. What are the symptoms of code P118E in a 2017 GMC Sierra?
Common symptoms include reduced engine performance, poor fuel efficiency, increased emissions, and possibly the Check Engine Light being illuminated.
3. What causes the P118E code to appear?
The code can be triggered by a faulty EGT sensor, damaged wiring or connectors, buildup of soot or debris on the sensor, or an issue with the engine control module (ECM).
4. Can a dirty exhaust gas temperature sensor cause code P118E?
Yes, soot or carbon buildup on the EGT sensor can cause it to malfunction and trigger the P118E code.
5. How do I fix the P118E code on my 2017 GMC Sierra?
Repairs may involve cleaning or replacing the EGT sensor, repairing damaged wiring or connectors, or updating the ECM software if necessary.
6. Can I drive my 2017 GMC Sierra with the P118E code?
While the vehicle may still be drivable, ignoring this code can lead to reduced performance, higher emissions, and potential damage to the exhaust system.
7. How much does it cost to fix the P118E code?
Replacing an EGT sensor typically costs between $150 and $300, including parts and labor, but costs can vary depending on the severity of the issue.
8. How can I diagnose the P118E code on my GMC Sierra?
Use an OBDII scanner to confirm the code, inspect the EGT sensor and its wiring for damage, and check for soot or debris buildup on the sensor.
9. Does the P118E code always mean the EGT sensor is faulty?
Not necessarily. The issue could also stem from wiring, connectors, or a software problem in the ECM.
10. How often should the Exhaust Gas Temperature Sensor be inspected?
It’s a good idea to inspect the EGT sensor during routine maintenance, especially if your vehicle has high mileage or operates under heavy loads frequently.
Discuss the causes and fixes for P118E 2017 GMC Sierra OBDII Code
Code P118E 2017 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.