AutoCodesChevrolet – P1198 Chevrolet

P1198 Chevrolet Code - Exhaust Gas Temperature Sensor 5 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
P1198 Chevrolet indicates Exhaust Gas Temperature Sensor 5 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 2,386
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 P1198 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 P1198 Chevrolet - Exhaust Gas Temperature Sensor 5 Performance Engine Running - AutoCodes.com
P1198 Chevrolet Code - Exhaust Gas Temperature Sensor 5 Performance Engine Running

What are the Possible Causes of the DTC P1198 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 P1198 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 P1198 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 P1198 Chevrolet code?

Need more information on how to fix the P1198 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 P1198 Chevrolet Code

What does the OBDII code P1198 mean for my Chevrolet?

The OBDII code P1198 indicates a performance issue with the Exhaust Gas Temperature (EGT) Sensor 5 while the engine is running, which can affect the vehicle’s emissions and performance.

What are common symptoms of the P1198 code?

Common symptoms include the check engine light being illuminated, reduced engine performance, increased fuel consumption, and potential issues with the exhaust system.

What could cause the P1198 code to trigger?

Possible causes include a faulty EGT sensor 5, wiring issues such as short circuits or corrosion, problems with the engine control module (ECM), or exhaust leaks.

How can I diagnose the P1198 code?

To diagnose the P1198 code, use a scan tool to confirm the code, inspect the EGT sensor and wiring for damage, check for exhaust leaks, and consider performing a visual inspection of related components.

What repairs are typically needed for the P1198 code?

Repairs may include replacing the faulty EGT sensor 5, repairing damaged wiring or connectors, fixing exhaust leaks, or updating the vehicle’s software if necessary.

Can I drive my Chevrolet with the P1198 code?

While it might be possible to drive the vehicle, it is not recommended, as it may lead to further engine performance issues and increased emissions.

Is the P1198 code serious?

Yes, the P1198 code can indicate a significant issue that may affect engine performance and emissions, so it’s advisable to address it promptly.

Will clearing the P1198 code fix the problem?

Clearing the code will not fix the underlying issue; the root cause must be diagnosed and repaired to prevent the code from reappearing.

What is the cost to repair the P1198 code?

Repair costs can vary widely depending on the cause; replacing the EGT sensor might range from $100 to $300, while more extensive repairs could be higher.

Are there any preventative measures to avoid the P1198 code?

Regular maintenance, including inspections of the exhaust system and electrical connections, can help prevent issues that may lead to the P1198 code.

Discuss the causes and fixes for P1198 Chevrolet OBDII Code

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