P1198 2014 GMC Sierra 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 2014 GMC Sierra 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.
Code P1198 2014 GMC Sierra Description
What are the Possible Causes of the DTC P1198 2014 GMC Sierra?
- 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 2014 GMC Sierra?
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 2014 GMC Sierra 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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Frequently Asked Questions about P1198 2014 GMC Sierra Code
1. What does the OBDII code P1198 mean in a 2014 GMC Sierra?
P1198 indicates an issue with Exhaust Gas Temperature Sensor 5's performance while the engine is running. It suggests the sensor is not operating within its expected parameters.
2. What are the symptoms of code P1198 in a 2014 GMC Sierra?
Common symptoms include reduced engine performance, poor fuel economy, the check engine light turning on, and possibly excessive exhaust emissions.
3. What causes the P1198 code to appear?
Potential causes include a faulty exhaust gas temperature sensor, wiring or connector issues, soot or debris buildup on the sensor, or problems with the engine control module (ECM).
4. How can I diagnose the P1198 code on my 2014 GMC Sierra?
Start by scanning the vehicle with an OBDII tool to confirm the code, inspect the sensor and wiring for damage or contamination, and test the sensor’s voltage and resistance against manufacturer specifications.
5. Can I drive my 2014 GMC Sierra with a P1198 code?
While the vehicle may still run, it’s not recommended to drive for extended periods, as the issue can cause reduced engine efficiency or damage to other components if left unresolved.
6. How do I fix the P1198 code on a 2014 GMC Sierra?
Repairs may include replacing the faulty exhaust gas temperature sensor, cleaning soot buildup, repairing or replacing damaged wiring or connectors, or reprogramming/updating the ECM.
7. How much does it cost to fix a P1198 code on a 2014 GMC Sierra?
The cost depends on the repair needed. Replacing the sensor typically costs $100–$300, while wiring repairs or ECM updates may vary based on labor rates.
8. Can a dirty exhaust system cause the P1198 code?
Yes, soot or debris buildup on the exhaust gas temperature sensor can cause it to malfunction, triggering the P1198 code.
9. Is the Exhaust Gas Temperature Sensor 5 the same as other exhaust sensors?
No, Exhaust Gas Temperature Sensor 5 refers to a specific sensor in the exhaust system that monitors temperature at a designated location, distinct from oxygen or NOx sensors.
10. Will clearing the P1198 code fix the issue permanently?
Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.
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