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Engine-Codes – Generic – P118F

P118F Code - Exhaust Gas Temperature Sensor 2 Performance Engine Running

Quick Answer

The P118F diagnostic trouble code (DTC) refers to the Exhaust Gas Temperature Sensor 2 Performance Engine Running. Common causes include Malfunctioning exhaust gas temperature sensor 2, Damaged wiring or connectors, Faulty ECM. 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 indicates Exhaust Gas Temperature Sensor 2 Performance Engine Running.
Common causes
Common causes include Malfunctioning exhaust gas temperature sensor 2, Damaged wiring or connectors, Faulty ECM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P118F Description

The P118F diagnostic trouble code (DTC) refers to the Exhaust Gas Temperature Sensor 2 Performance Engine Running. This code indicates that there is a performance issue with the exhaust gas temperature sensor 2 while the engine is running. The exhaust gas temperature sensor is responsible for monitoring the temperature of the exhaust gases leaving the engine. This information is crucial for the engine control module (ECM) to adjust fuel injection and timing to ensure optimal performance and emissions.

OBDII Code P118F - Exhaust Gas Temperature Sensor 2 Performance Engine Running
P118F Code - Exhaust Gas Temperature Sensor 2 Performance Engine Running

Common Causes of P118F

  1. Malfunctioning exhaust gas temperature sensor 2
  2. Damaged wiring or connectors
  3. Faulty ECM
  4. Exhaust system leaks
  5. Exhaust gas recirculation (EGR) system issues

Symptoms of P118F

  1. Decreased fuel efficiency
  2. Rough idling
  3. Hesitation during acceleration
  4. Stalling

How to Fix P118F

  1. Diagnostic: Use a scan tool to retrieve the DTC and perform a thorough diagnosis of the exhaust gas temperature sensor 2 and related components.
  2. Inspection: Inspect the sensor, wiring, and connectors for any visible damage or corrosion.
  3. Replacement: Replace the exhaust gas temperature sensor 2 if it is found to be faulty. Ensure proper installation and secure connections.
  4. Repair wiring: Repair or replace any damaged wiring or connectors.
  5. ECM reprogramming: If the issue is related to the ECM, reprogramming or replacing it may be necessary.

Cost to Fix P118F

The typical repair costs for addressing the P118F code can vary depending on the specific cause of the issue and the vehicle's make and model. In general, the cost of replacing the exhaust gas temperature sensor 2 and related components can range from $150 to $400, including parts and labor. Additional costs may apply if wiring repairs or ECM reprogramming are needed. It's recommended to contact local auto repair shops for accurate estimates based on your vehicle's specific requirements. Keep in mind that labor rates can vary, with hourly rates typically ranging from $80 to $150.

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Code P118F Information for Specific Makes

  • P118F Buick — Exhaust Gas Temperature Sensor 2 Performance Engine Running
  • P118F Cadillac — Exhaust Gas Temperature Sensor 2 Performance Engine Running
  • P118F Chevrolet — Exhaust Gas Temperature Sensor 2 Performance Engine Running
  • P118F GMC — Exhaust Gas Temperature Sensor 2 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 P118F Code

1. What are the common symptoms of OBDII code P118F (Exhaust Gas Temperature Sensor 2 Performance Engine Running)?

The common symptoms of code P118F may include reduced engine performance, increased fuel consumption, and illuminated Check Engine Light.

2. What can cause OBDII code P118F to trigger?

Code P118F can be triggered by issues such as a faulty exhaust gas temperature sensor, wiring problems, exhaust leaks, or issues with the engine control module.

3. How serious is OBDII code P118F?

While OBDII code P118F may not cause immediate harm to the vehicle, it can lead to reduced engine efficiency and performance if left unresolved. It is recommended to address the issue promptly.

4. What should I do if my vehicle shows OBDII code P118F?

If your vehicle displays code P118F, it is advisable to have the exhaust gas temperature sensor and related components inspected by a qualified mechanic to determine the root cause of the issue.

5. Can I continue driving with OBDII code P118F present?

It is generally not recommended to drive with an unresolved OBDII code like P118F, as it can lead to further damage to the vehicle and potentially affect engine performance.

6. How can I repair OBDII code P118F?

Repairing OBDII code P118F may involve replacing the faulty exhaust gas temperature sensor, repairing any wiring issues, fixing exhaust leaks, or addressing problems with the engine control module.

7. Are there any DIY tips for troubleshooting OBDII code P118F?

While some basic troubleshooting like checking for loose or damaged wiring connections can be done by DIY enthusiasts, diagnosing and repairing code P118F may require specialized tools and expertise.

8. Can a faulty exhaust gas temperature sensor cause other issues besides triggering code P118F?

Yes, a faulty exhaust gas temperature sensor can lead to issues such as poor fuel efficiency, reduced engine power, and increased emissions if not functioning correctly.

9. How much does it typically cost to repair OBDII code P118F?

The cost of repairing OBDII code P118F can vary depending on the root cause of the issue, the cost of parts, and labor charges. It is recommended to obtain a quote from a trusted mechanic.

10. Is it possible for code P118F to be a false alarm?

While rare, there is a possibility of a false alarm triggering code P118F. In such cases, it is advisable to have the vehicle thoroughly inspected to rule out any underlying issues.

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