AutoCodes – Chevrolet – P118F Chevrolet

P118F Chevrolet 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 Chevrolet 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.

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Code Popularity 1,374

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 P118F Chevrolet 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 P118F Chevrolet - Exhaust Gas Temperature Sensor 2 Performance Engine Running - AutoCodes.com — P118F Chevrolet Code - Exhaust Gas Temperature Sensor 2 Performance Engine Running

What does this mean?

What are the Possible Causes of the DTC P118F Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

Need more information on how to fix the P118F Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P118F Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P118F 2014 Chevrolet Silverado — Exhaust Gas Temperature Sensor 2 Performance Engine Running
P118F 2015 Chevrolet Silverado — Exhaust Gas Temperature Sensor 2 Performance Engine Running
P118F 2016 Chevrolet Silverado — Exhaust Gas Temperature Sensor 2 Performance Engine Running
P118F 2017 Chevrolet Silverado — Exhaust Gas Temperature Sensor 2 Performance Engine Running
P118F 2018 Chevrolet Silverado — 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 Chevrolet Code

1. What are common symptoms of OBDII code P118F in a Chevrolet related to the Exhaust Gas Temperature Sensor 2 performance while the engine is running?

The common symptoms include poor engine performance, reduced fuel efficiency, and potential illumination of the check engine light.

2. What are some possible causes of OBDII code P118F in a Chevrolet related to the Exhaust Gas Temperature Sensor 2 performance while the engine is running?

Possible causes include a faulty exhaust gas temperature sensor, wiring issues, sensor circuit problems, exhaust system leaks, or a malfunctioning engine control module.

3. How can I diagnose the OBDII code P118F in a Chevrolet related to the Exhaust Gas Temperature Sensor 2 performance while the engine is running?

Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the sensor and its wiring for damage, checking for exhaust leaks, and testing the sensor's resistance and voltage output.

4. Can I continue driving my Chevrolet with OBDII code P118F related to the Exhaust Gas Temperature Sensor 2 performance while the engine is running?

It is not recommended to continue driving with this code present, as it can lead to further engine issues and potential damage. It's best to address the problem promptly to avoid more serious issues.

5. How can I repair OBDII code P118F in a Chevrolet related to the Exhaust Gas Temperature Sensor 2 performance while the engine is running?

Repair may involve replacing the faulty exhaust gas temperature sensor, repairing damaged wiring, fixing exhaust leaks, or reprogramming the engine control module. It's recommended to follow the manufacturer's repair procedures.

6. Are there any DIY tips for fixing OBDII code P118F in a Chevrolet related to the Exhaust Gas Temperature Sensor 2 performance while the engine is running?

While some basic troubleshooting like checking for loose connections or damaged wiring can be done as a DIY, it's recommended to have a professional diagnose and repair this issue due to the complexity of the sensor and its integration with the engine system.

7. How long does it typically take to repair OBDII code P118F in a Chevrolet related to the Exhaust Gas Temperature Sensor 2 performance while the engine is running?

The repair time can vary depending on the exact cause of the issue. It can range from a quick sensor replacement to more extensive repairs if wiring or other components need attention. It's best to consult a mechanic for a more accurate estimate.

8. Can a faulty OBDII code P118F related to the Exhaust Gas Temperature Sensor 2 performance affect the vehicle's emissions?

Yes, a faulty sensor can impact the vehicle's emissions by causing incorrect readings and affecting the fuel-air mixture. It's important to address this issue to ensure the vehicle meets emissions standards.

9. Will resetting the OBDII system clear the P118F code related to the Exhaust Gas Temperature Sensor 2 performance in a Chevrolet?

While resetting the system may temporarily clear the code, it will likely reappear if the underlying issue is not addressed. It's recommended to diagnose and repair the problem to prevent the code from returning.

10. Is it necessary to replace the Exhaust Gas Temperature Sensor 2 when dealing with OBDII code P118F in a Chevrolet?

In most cases, replacing the sensor is the most effective solution for resolving the P118F code related to the Exhaust Gas Temperature Sensor 2 performance issue. However, proper diagnosis by a qualified technician is essential to confirm the exact cause of the problem before replacing any parts.