AutoCodes – Cadillac – P1197 Cadillac

P1197 Cadillac 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 Cadillac 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 430

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

What does this mean?

What are the Possible Causes of the DTC P1197 Cadillac?

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 Cadillac?

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 Cadillac 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 P1197 Cadillac Code

1. What are the common symptoms of OBDII code P1197 on a Cadillac related to the Exhaust Gas Temperature Sensor 4?

- Common symptoms include reduced engine performance, decreased fuel efficiency, and potential issues with the exhaust system.

2. What are the possible causes of OBDII code P1197 on a Cadillac?

- The code P1197 can be triggered by a faulty Exhaust Gas Temperature Sensor 4, wiring issues, exhaust system leaks, or problems with the catalytic converter.

3. How can I diagnose the cause of OBDII code P1197 on my Cadillac?

- A thorough inspection of the Exhaust Gas Temperature Sensor 4, its wiring, and the exhaust system components is recommended. Using an OBDII scanner to retrieve freeze frame data can also aid in diagnosis.

4. Can I drive my Cadillac with OBDII code P1197 present?

- It is not recommended to drive your Cadillac with the P1197 code present, as it can lead to further damage to the engine or catalytic converter. Immediate attention and repair are advised.

5. How can I reset OBDII code P1197 on my Cadillac?

- Resetting the code can be done with an OBDII scanner or by disconnecting the car's battery for a few minutes. However, it is important to address the underlying issue causing the code before resetting it.

6. Is it safe to ignore OBDII code P1197 on my Cadillac?

- Ignoring the code can lead to potential engine damage or increased emissions. It is recommended to address the issue promptly to prevent further problems.

7. Are there any DIY repair tips for fixing OBDII code P1197 on a Cadillac?

- DIY repairs may include checking and cleaning the Exhaust Gas Temperature Sensor 4 connectors, inspecting for loose or damaged wiring, and ensuring proper installation of the sensor.

8. How much does it typically cost to repair OBDII code P1197 on a Cadillac?

- The cost of repair can vary depending on the exact cause of the code. Repairs may range from replacing the Exhaust Gas Temperature Sensor 4 to addressing more complex exhaust system issues.

9. Can a faulty Exhaust Gas Temperature Sensor 4 cause other problems in my Cadillac?

- A faulty sensor can affect engine performance, fuel efficiency, and emissions. Ignoring the issue may lead to further damage to other components in the exhaust system.

10. How often should the Exhaust Gas Temperature Sensor 4 be inspected in a Cadillac to prevent OBDII code P1197?

- It is recommended to include the sensor in regular maintenance checks, especially if experiencing symptoms related to engine performance or fuel efficiency.