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Engine-Codes – GMC – P1198 GMC

P1198 GMC Code - Exhaust Gas Temperature Sensor 5 Performance Engine Running

Quick Answer

The P1198 GMC code indicates a performance issue with the Exhaust Gas Temperature Sensor 5 while the engine is running. Common causes include Faulty Exhaust Gas Temperature Sensor 5, Wiring or connector issues, Exhaust system leaks. 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
P1198 GMC indicates Exhaust Gas Temperature Sensor 5 Performance Engine Running.
Common causes
Common causes include Faulty Exhaust Gas Temperature Sensor 5, Wiring or connector issues, Exhaust system leaks.
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 06, 2024
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Code P1198 GMC Description

The P1198 GMC code indicates a performance issue with the Exhaust Gas Temperature Sensor 5 while the engine is running. This sensor is responsible for monitoring the exhaust gas temperature to ensure optimal fuel combustion and emission levels. When this sensor fails to perform correctly, it can lead to a variety of issues that can affect the vehicle's performance and emissions output. The incorrect readings from the sensor can cause the engine to run inefficiently, potentially leading to decreased fuel economy, poor acceleration, and increased emissions. If left unaddressed, this issue can also cause damage to other components of the exhaust system and may result in the vehicle failing emissions tests.

OBDII Code P1198 GMC - Exhaust Gas Temperature Sensor 5 Performance Engine Running
P1198 GMC Code - Exhaust Gas Temperature Sensor 5 Performance Engine Running

Common Causes of P1198 GMC

  1. Faulty Exhaust Gas Temperature Sensor 5
  2. Wiring or connector issues
  3. Exhaust system leaks
  4. Engine running too hot
  5. Software or calibration issues

Symptoms of P1198 GMC

  1. Decreased fuel efficiency
  2. Rough idling or engine misfires
  3. Check Engine Light illuminated
  4. Reduced engine performance
  5. Increased emissions output

How to Fix P1198 GMC

  1. Diagnose the issue by using a scan tool to verify the code and check the sensor's readings.
  2. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  3. Check for exhaust leaks and repair them to ensure accurate sensor readings.
  4. Test the sensor's operation and replace it if it is found to be faulty.
  5. Clear the diagnostic trouble codes and test drive the vehicle to confirm the repair.

Cost to Fix P1198 GMC

The cost of repairing a P1198 GMC code can vary depending on the specific cause of the issue and the labor rates in your area. In general, replacing an Exhaust Gas Temperature Sensor 5 can cost between $100 and $300, including parts and labor. Additional costs may be incurred if there are other underlying issues that need to be addressed. It is recommended to consult with a professional mechanic to get an accurate estimate for your specific vehicle.

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Information for Specific GMC 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 P1198 GMC Code

1. What are the common symptoms of OBDII code P1198 in a GMC vehicle?

The common symptoms of OBDII code P1198 in a GMC vehicle include poor engine performance, decreased fuel efficiency, and potential illumination of the check engine light.

2. What does OBDII code P1198 indicate in a GMC vehicle?

OBDII code P1198 in a GMC vehicle indicates a performance issue with Exhaust Gas Temperature Sensor 5 while the engine is running.

3. What are the possible causes of OBDII code P1198 in a GMC vehicle?

Possible causes of OBDII code P1198 in a GMC vehicle include a faulty Exhaust Gas Temperature Sensor 5, wiring issues, sensor circuit problems, or a malfunctioning engine control module.

4. How can I diagnose OBDII code P1198 in my GMC vehicle?

To diagnose OBDII code P1198 in your GMC vehicle, you can use an OBDII scanner to retrieve the specific fault code, inspect the Exhaust Gas Temperature Sensor 5 and its wiring for any visible damage, and perform a continuity test to check for circuit integrity.

5. Can I still drive my GMC vehicle with OBDII code P1198 present?

It is not recommended to drive your GMC vehicle with OBDII code P1198 present, as it can lead to further engine damage and decreased performance. It is advisable to address the issue promptly.

6. How can I repair OBDII code P1198 in my GMC vehicle?

To repair OBDII code P1198 in your GMC vehicle, you may need to replace the Exhaust Gas Temperature Sensor 5, repair any damaged wiring or connections, and clear the fault code using an OBDII scanner.

7. Is it necessary to reset the OBDII code P1198 after making repairs in a GMC vehicle?

Yes, it is important to reset the OBDII code P1198 after making repairs in a GMC vehicle to clear the fault code from the system and ensure proper monitoring of the sensor's performance.

8. Can a DIY enthusiast fix OBDII code P1198 in a GMC vehicle?

Depending on the level of automotive knowledge and experience, a DIY enthusiast may be able to fix OBDII code P1198 in a GMC vehicle by following repair guides, utilizing proper tools, and ensuring safety precautions are in place.

9. What are the long-term effects of ignoring OBDII code P1198 in a GMC vehicle?

Ignoring OBDII code P1198 in a GMC vehicle can lead to decreased engine efficiency, potential damage to engine components, and increased emissions. It is recommended to address the issue promptly to prevent further issues.

10. How can I prevent OBDII code P1198 from occurring in my GMC vehicle?

To prevent OBDII code P1198 from occurring in your GMC vehicle, it is important to perform regular maintenance checks, address any sensor or wiring issues promptly, and follow the manufacturer's recommended service schedule.

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