AutoCodes – Chevrolet – P1198 2018 Chevrolet Silverado

P1198 2018 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 2018 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 443

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 2018 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 2018 Chevrolet Silverado - Exhaust Gas Temperature Sensor 5 Performance Engine Running - AutoCodes.com — P1198 2018 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 5 Performance Engine Running

What does this mean?

What are the Possible Causes of the DTC P1198 2018 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 2018 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 2018 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P1198 2018 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 2018 Chevrolet Silverado Code

1. What does the OBDII code P1198 mean for a 2018 Chevrolet Silverado?

P1198 indicates a performance issue with Exhaust Gas Temperature Sensor 5 while the engine is running, meaning the sensor is not functioning within its expected range.

2. What are the common symptoms of code P1198 in a 2018 Chevrolet Silverado?

Symptoms may include the check engine light illuminating, reduced fuel efficiency, poor engine performance, or the vehicle going into limp mode.

3. What causes the P1198 code to appear on a 2018 Chevrolet Silverado?

Common causes include a faulty Exhaust Gas Temperature Sensor 5, wiring issues such as shorts or open circuits, or soot buildup on the sensor.

4. How do I diagnose the P1198 code on my 2018 Chevrolet Silverado?

Start by using a scan tool to confirm the code. Inspect the wiring and connectors for damage, test the sensor's resistance with a multimeter, and check for soot or debris buildup.

5. Can driving with code P1198 damage my 2018 Chevrolet Silverado?

Driving with this code can lead to increased emissions and potential damage to the exhaust system or turbocharger if the issue is not addressed promptly.

6. How do I fix the P1198 code on a 2018 Chevrolet Silverado?

Repairs may include cleaning or replacing Exhaust Gas Temperature Sensor 5, repairing damaged wiring, or updating the vehicle's software if a manufacturer update is available.

7. How much does it cost to repair the P1198 code on a 2018 Chevrolet Silverado?

The cost varies depending on the issue, but replacing the sensor typically costs between $150 and $300, including parts and labor.

8. Can I clear the P1198 code without fixing the problem?

Clearing the code with a scan tool may temporarily turn off the check engine light, but the issue will likely return unless the underlying problem is resolved.

9. Where is Exhaust Gas Temperature Sensor 5 located on a 2018 Chevrolet Silverado?

Sensor 5 is usually located in the exhaust system, downstream of the turbocharger or near the diesel particulate filter (DPF), depending on the engine configuration.

10. How can I prevent the P1198 code from occurring again?

Regular maintenance, including inspecting sensors, cleaning the exhaust system, and addressing engine issues promptly, can help prevent this code from reappearing.