AutoCodes – Generic – P118E

P118E 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 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 2,282

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

What does this mean?

What are the Possible Causes of the DTC P118E?

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?

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 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 code?

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

Need Help with the Code?

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

Information for Specific Makes

P118E Buick — Exhaust Gas Temperature Sensor 1 Performance Engine Running
P118E Cadillac — Exhaust Gas Temperature Sensor 1 Performance Engine Running
P118E Chevrolet — Exhaust Gas Temperature Sensor 1 Performance Engine Running
P118E GMC — 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 Code

1. What are common symptoms of OBDII code P118E?

- Common symptoms of code P118E may include reduced engine performance, increased fuel consumption, and the illumination of the check engine light.

2. What can cause OBDII code P118E to be triggered?

- Code P118E is typically triggered by a faulty exhaust gas temperature sensor 1, wiring issues, or problems with the sensor's circuit.

3. How can I diagnose the cause of OBDII code P118E?

- To diagnose the cause of code P118E, you can conduct a visual inspection of the sensor and its wiring, perform electrical tests on the sensor, and use a scan tool to monitor sensor data.

4. Is it safe to continue driving with OBDII code P118E present?

- It is not recommended to continue driving with code P118E active, as it can lead to further damage to the engine and emissions system. It is best to address the issue promptly.

5. How can I repair OBDII code P118E?

- Repairing code P118E involves replacing the faulty exhaust gas temperature sensor 1, repairing any damaged wiring or connectors, and clearing the code with a scan tool.

6. Can I reset OBDII code P118E without fixing the underlying issue?

- While you can clear the code temporarily, it will likely reappear if the underlying issue is not addressed. It is important to fix the root cause of the problem to prevent code recurrence.

7. Are there any tips for preventing OBDII code P118E from reoccurring?

- To prevent code P118E from reoccurring, ensure regular maintenance of the exhaust gas temperature sensor, keep an eye on the vehicle's overall health, and address any engine performance issues promptly.

8. How long does it typically take to repair OBDII code P118E?

- The repair time for code P118E can vary depending on the extent of the issue and the availability of parts. In general, the repair can take anywhere from 1 to 3 hours.

9. Can a DIY enthusiast fix OBDII code P118E at home?

- If you have the necessary tools, skills, and knowledge, you may be able to fix code P118E at home. However, if you are unsure, it is best to seek assistance from a professional mechanic.

10. Will fixing OBDII code P118E improve my vehicle's performance?

- Yes, addressing and repairing code P118E can lead to improved engine performance, better fuel efficiency, and overall smoother operation of the vehicle.