AutoCodes – Chevrolet – P1198 2015 Chevrolet Silverado

P1198 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 391

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 P1198 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado - Exhaust Gas Temperature Sensor 5 Performance Engine Running - AutoCodes.com — P1198 2015 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 5 Performance Engine Running

What does this mean?

What are the Possible Causes of the DTC P1198 2015 Chevrolet Silverado?

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 2015 Chevrolet Silverado?

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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado code?

Need more information on how to fix the P1198 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P1198 2015 Chevrolet Silverado Code

1. What does OBDII code P1198 mean on a 2015 Chevrolet Silverado?

P1198 indicates an issue with Exhaust Gas Temperature (EGT) Sensor 5, specifically related to its performance while the engine is running.

2. What are the common symptoms of code P1198?

Symptoms may include poor fuel efficiency, reduced engine power, an illuminated check engine light, and possible exhaust system overheating.

3. What causes code P1198 on a 2015 Chevrolet Silverado?

Common causes include a faulty EGT sensor, damaged wiring or connectors, excessive soot buildup, or an issue with the diesel particulate filter (DPF).

4. Can I drive my Silverado with code P1198?

Driving with this code is not recommended as it may lead to reduced performance, higher emissions, or damage to the exhaust system components.

5. How do I diagnose code P1198?

Start by inspecting the wiring and connectors for damage. Use a scan tool to monitor EGT sensor readings and compare them to expected values. Perform a physical inspection of the sensor for soot or damage.

6. How do I fix code P1198 on a 2015 Chevrolet Silverado?

Repairs may include cleaning or replacing the EGT sensor, repairing damaged wiring, clearing soot buildup in the exhaust, or addressing issues with the DPF.

7. How much does it cost to fix code P1198?

The cost depends on the cause. Replacing an EGT sensor typically costs $100-$300, while more extensive repairs like DPF cleaning or wiring repairs can increase the cost.

8. Can a dirty DPF cause code P1198?

Yes, a clogged or dirty diesel particulate filter can cause abnormal exhaust temperatures, leading to EGT sensor performance issues and triggering the P1198 code.

9. How can I prevent code P1198 from occurring again?

Regular maintenance, such as cleaning the DPF, checking for exhaust leaks, and inspecting wiring, can help prevent this code from reoccurring.

10. Do I need a professional to fix code P1198?

While basic inspections can be done at home, diagnosing and repairing EGT sensor or DPF issues often requires specialized tools and expertise, so consulting a professional is recommended.