AutoCodes – GMC – P118E GMC

P118E GMC Code - Exhaust Gas Temperature Sensor 1 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: P118E GMC indicates Exhaust Gas Temperature Sensor 1 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.

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Code Popularity 1,151

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P118E GMC Description

The exhaust gas temperature sensors are variable resistors that measure the temperature of the exhaust gas. The exhaust temperature sensor 1 is the first exhaust temperature sensor on the exhaust system, the following exhaust temperature sensors are counted upward from the engine outlet to the exhaust system end. The Engine Control Module (ECM) supplies 5 V to the exhaust gas temperature signal circuit and supplies a ground to the low reference circuit. The exhaust gas temperature sensor temperature information is used by the ECM during the exhaust gas particulate filter cleaning process. The Diagnostic Trouble Code (DTC) will be set if the ECM detects that the difference between measured exhaust gas temperature and the estimated exhaust gas temperature is greater than a calibrated amount for greater than 1 s.

OBDII Code P118E GMC - Exhaust Gas Temperature Sensor 1 Performance Engine Running - AutoCodes.com — P118E GMC Code - Exhaust Gas Temperature Sensor 1 Performance Engine Running

What does this mean?

What are the Possible Causes of the DTC P118E GMC?

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 P118E GMC?

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 P118E GMC 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 P118E GMC code?

Need more information on how to fix the P118E GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P118E GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P118E 2014 GMC Sierra — Exhaust Gas Temperature Sensor 1 Performance Engine Running
P118E 2015 GMC Sierra — Exhaust Gas Temperature Sensor 1 Performance Engine Running
P118E 2016 GMC Sierra — Exhaust Gas Temperature Sensor 1 Performance Engine Running
P118E 2017 GMC Sierra — Exhaust Gas Temperature Sensor 1 Performance Engine Running
P118E 2018 GMC Sierra — Exhaust Gas Temperature Sensor 1 Performance Engine Running

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P118E GMC Code

1. What are the common symptoms of OBDII code P118E GMC?

- Common symptoms of P118E GMC may include the check engine light coming on, reduced engine performance, and increased fuel consumption.

2. What are the potential causes of OBDII code P118E GMC?

- The code P118E GMC is typically triggered by issues with the exhaust gas temperature sensor 1, such as sensor failure, wiring problems, or a faulty connection.

3. How can I diagnose the OBDII code P118E GMC?

- To diagnose P118E GMC, you can use an OBDII scanner to retrieve the trouble codes, then inspect the exhaust gas temperature sensor 1 and its wiring for any visible damage or issues.

4. Can a faulty exhaust gas temperature sensor cause code P118E GMC?

- Yes, a faulty exhaust gas temperature sensor 1 can trigger code P118E GMC as the sensor is responsible for monitoring the exhaust gas temperature and its performance.

5. How do I repair OBDII code P118E GMC?

- Repairing P118E GMC typically involves replacing the exhaust gas temperature sensor 1 if it is found to be faulty. Ensure proper installation and secure connection to fix the issue.

6. Are there any DIY tips for troubleshooting code P118E GMC?

- DIY tips for troubleshooting P118E GMC include checking the sensor's wiring for any damage, ensuring proper connections, and clearing the code after sensor replacement.

7. Can driving with OBDII code P118E GMC cause further damage to the vehicle?

- While driving with P118E GMC may not immediately harm your vehicle, it is recommended to address the issue promptly to prevent potential long-term damage to the engine or emissions system.

8. How much does it cost to repair OBDII code P118E GMC at a mechanic?

- The cost to repair P118E GMC at a mechanic can vary depending on the labor rates and parts costs, but it typically ranges from $150 to $300 for sensor replacement and diagnostic services.

9. Will resetting the OBDII code P118E GMC make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing P118E GMC is not fixed, the code is likely to reappear once the vehicle is driven again.

10. Is it safe to continue driving my vehicle with OBDII code P118E GMC?

- While it may be safe to drive with P118E GMC in the short term, it is recommended to address the issue promptly to prevent potential performance issues and ensure the vehicle's proper functioning.