AutoCodes – Buick – P118F Buick

P118F Buick 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 Buick 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 554

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

What does this mean?

What are the Possible Causes of the DTC P118F Buick?

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 Buick?

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 Buick 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.

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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 Buick Code

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

- Common symptoms may include poor engine performance, reduced fuel efficiency, and potential illumination of the check engine light.

2. What are some possible causes of the P118F code in a Buick, specifically related to the Exhaust Gas Temperature Sensor 2 performance during engine operation?

- Potential causes can include a faulty exhaust gas temperature sensor, wiring issues, exhaust leaks, or problems with the electronic control module (ECM).

3. How can I diagnose the OBDII code P118F in my Buick 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 code, checking the sensor and related wiring for any visible damage, and testing the sensor's resistance and operation.

4. Is it safe to continue driving my Buick with the P118F code related to the Exhaust Gas Temperature Sensor 2 performance during engine operation?

- It is generally not recommended to drive the vehicle with this code present, as it can lead to potential engine damage and further issues if left unresolved.

5. What are some repair tips for addressing the OBDII code P118F in a Buick related to the Exhaust Gas Temperature Sensor 2 performance while the engine is running?

- Repair tips may include replacing the faulty exhaust gas temperature sensor, repairing any damaged wiring, fixing exhaust leaks, or reprogramming the ECM if necessary.

6. Can resetting the OBDII code P118F related to the Exhaust Gas Temperature Sensor 2 performance solve the issue in my Buick?

- Resetting the code may temporarily clear the check engine light, but it will not fix the underlying problem causing the code to trigger. Proper diagnosis and repairs are recommended.

7. How much does it typically cost to repair the OBDII code P118F in a Buick related to the Exhaust Gas Temperature Sensor 2 performance during engine operation?

- Repair costs can vary depending on the exact cause of the issue, but it may range from $100 to $300 or more, including parts and labor.

8. Are there any recalls or technical service bulletins (TSBs) related to the OBDII code P118F in Buick vehicles concerning the Exhaust Gas Temperature Sensor 2 performance?

- It's advisable to check with your local Buick dealership or visit the National Highway Traffic Safety Administration (NHTSA) website for any relevant recalls or TSBs related to this specific code.

9. How can I prevent the OBDII code P118F related to the Exhaust Gas Temperature Sensor 2 performance from occurring in my Buick?

- Regular maintenance, such as inspecting and replacing sensors as needed, checking for exhaust leaks, and addressing any engine performance issues promptly, can help prevent this code from appearing.