AutoCodesChevrolet – P118E Chevrolet

P118E Chevrolet 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 Chevrolet 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 3,440
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 29, 2024
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Code P118E 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 P118E Chevrolet - Exhaust Gas Temperature Sensor 1 Performance Engine Running - AutoCodes.com
P118E Chevrolet Code - Exhaust Gas Temperature Sensor 1 Performance Engine Running

What are the Possible Causes of the DTC P118E 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 P118E 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 P118E 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 P118E Chevrolet code?

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

Need Help with the Code?

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Information for Specific Chevrolet Models

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 Chevrolet Code

What does the OBDII code P118E mean on a Chevrolet?

P118E indicates a performance issue with Exhaust Gas Temperature Sensor 1 while the engine is running. This sensor monitors exhaust temperatures to ensure optimal engine and emissions performance.

What are the common symptoms of code P118E in a Chevrolet?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, poor engine performance, or the engine entering a limp mode.

What causes the P118E code to trigger in a Chevrolet?

Common causes include a faulty exhaust gas temperature sensor, damaged wiring or connectors, excessive exhaust soot buildup, or issues with the engine control module (ECM).

Can I drive my Chevrolet with a P118E code?

While it may be possible to drive with this code, it is not recommended, as it could lead to reduced engine performance, higher emissions, or potential damage to the catalytic converter.

How do I fix the P118E code on my Chevrolet?

Repairs may involve replacing the faulty exhaust gas temperature sensor, cleaning soot buildup, inspecting and repairing damaged wiring, or updating/reprogramming the ECM if needed.

How much does it cost to repair a P118E code on a Chevrolet?

Repair costs can vary widely but typically range from $100 to $300 for parts and labor, depending on whether the sensor, wiring, or other components need replacement.

Can a dirty exhaust system cause the P118E code?

Yes, excessive soot or carbon buildup in the exhaust system can interfere with the sensor’s performance and trigger the P118E code.

How can I prevent the P118E code from occurring in my Chevrolet?

Regular vehicle maintenance, including cleaning the exhaust system, inspecting sensor wiring, and using high-quality fuel, can help prevent issues with the exhaust gas temperature sensor.

Is replacing the exhaust gas temperature sensor difficult?

Replacing the sensor can be straightforward for experienced DIYers, but accessing it may require specific tools or knowledge of the exhaust system layout.

Will clearing the P118E code solve the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.

Discuss the causes and fixes for P118E Chevrolet OBDII Code

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