AutoCodes – GMC – P1197 GMC

P1197 GMC Code - Exhaust Gas Temperature Sensor 4 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: P1197 GMC indicates Exhaust Gas Temperature Sensor 4 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 890

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 P1197 GMC 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 P1197 GMC - Exhaust Gas Temperature Sensor 4 Performance Engine Running - AutoCodes.com — P1197 GMC Code - Exhaust Gas Temperature Sensor 4 Performance Engine Running

What does this mean?

What are the Possible Causes of the DTC P1197 GMC?

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 P1197 GMC?

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 P1197 GMC 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 P1197 GMC code?

Need more information on how to fix the P1197 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1197 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P1197 2014 GMC Sierra — Exhaust Gas Temperature Sensor 4 Performance Engine Running
P1197 2015 GMC Sierra — Exhaust Gas Temperature Sensor 4 Performance Engine Running
P1197 2016 GMC Sierra — Exhaust Gas Temperature Sensor 4 Performance Engine Running
P1197 2017 GMC Sierra — Exhaust Gas Temperature Sensor 4 Performance Engine Running
P1197 2018 GMC Sierra — Exhaust Gas Temperature Sensor 4 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 P1197 GMC Code

1. What are the common symptoms of OBDII code P1197 in a GMC vehicle?

The common symptoms of code P1197 include poor engine performance, reduced fuel efficiency, and potential issues with the exhaust system.

2. What can cause the OBDII code P1197 to trigger in a GMC vehicle?

The P1197 code is typically triggered by a faulty Exhaust Gas Temperature (EGT) Sensor 4, issues with the wiring or connectors related to the sensor, or a problem with the sensor's circuit.

3. How serious is the OBDII code P1197 in a GMC vehicle?

While the P1197 code may not cause immediate harm to the vehicle, it can lead to decreased engine efficiency and performance if left unresolved. It is recommended to address the issue promptly.

4. How can I diagnose the OBDII code P1197 in my GMC vehicle?

Diagnosing code P1197 usually involves using an OBDII scanner to read the fault codes, inspecting the EGT Sensor 4 and its wiring for any visible damage, and performing a thorough inspection of the exhaust system.

5. Can I drive my GMC vehicle with the OBDII code P1197?

It is generally not recommended to drive your vehicle with an unresolved P1197 code, as it can lead to further damage and reduced performance over time. It's best to address the issue as soon as possible.

6. How can I repair the OBDII code P1197 in my GMC vehicle?

Repairing the P1197 code typically involves replacing the faulty Exhaust Gas Temperature Sensor 4, repairing any damaged wiring or connectors, and clearing the fault codes with an OBDII scanner.

7. Are there any DIY tips for fixing the OBDII code P1197 in a GMC vehicle?

While some may attempt to replace the EGT Sensor 4 themselves, it is recommended to have the repair done by a qualified mechanic to ensure proper installation and resolution of the issue.

8. Can a faulty EGT Sensor 4 cause other issues in my GMC vehicle?

Yes, a faulty EGT Sensor 4 can lead to engine performance issues, reduced fuel efficiency, and potentially affect the overall operation of the vehicle's exhaust system.

9. How much does it cost to repair the OBDII code P1197 in a GMC vehicle?

The cost of repairing the P1197 code can vary depending on the make and model of the vehicle, the labor rates in your area, and the extent of the repairs needed. It is recommended to obtain quotes from local mechanics for an accurate estimate.

10. Is it necessary to reset the ECM after repairing the OBDII code P1197 in a GMC vehicle?

Yes, it is important to reset the Engine Control Module (ECM) after repairing the P1197 code to clear the fault codes and ensure the issue has been resolved.