P128D 2014 GMC Sierra Code - Fuel Rail Temperature Sensor 2 Signal Message Counter Incorrect
Quick Answer
The P128D diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Fuel Rail Temperature Sensor 2 Signal Message Counter is incorrect. Common causes include Faulty fuel rail temperature sensor 2, Wiring issues or poor connections, Corrosion on sensor or wiring. 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
- P128D 2014 GMC Sierra indicates Fuel Rail Temperature Sensor 2 Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty fuel rail temperature sensor 2, Wiring issues or poor connections, Corrosion on sensor or wiring.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P128D 2014 GMC Sierra Description
The P128D diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Fuel Rail Temperature Sensor 2 Signal Message Counter is incorrect. This means that the signal message counter from the fuel rail temperature sensor 2 is not within the expected range or is sending inconsistent data to the engine control module (ECM). The fuel rail temperature sensor is a crucial component that helps the ECM monitor the temperature of the fuel in the fuel rail, allowing for optimal fuel delivery and combustion efficiency.
Common Causes of P128D 2014 GMC Sierra
- Faulty fuel rail temperature sensor 2
- Wiring issues or poor connections
- Corrosion on sensor or wiring
- ECM malfunction
- Other related component failures
Symptoms of P128D 2014 GMC Sierra
- Decreased fuel efficiency
- Rough idling
- Hesitation during acceleration
- Engine stalling
- Check Engine Light illuminated
How to Fix P128D 2014 GMC Sierra
- Diagnose the issue by using a scan tool to retrieve the specific DTC and inspect the fuel rail temperature sensor 2 and its wiring for any visible damage or corrosion.
- Test the sensor's resistance and voltage output to determine if it is functioning properly.
- Replace the fuel rail temperature sensor 2 if it is found to be faulty, ensuring proper installation and connection.
- Clear the DTC from the ECM's memory and perform a test drive to verify that the issue has been resolved.
- If the problem persists, further diagnostics may be necessary to identify any underlying issues with the ECM or related components.
Cost to Fix P128D 2014 GMC Sierra
The typical repair costs for addressing a P128D code on a 2014 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a fuel rail temperature sensor 2 can range from $100 to $200 for the part, with additional costs for labor that can amount to $100 to $200. Overall, the total repair cost may fall within the range of $200 to $400. It's important to note that these estimates are rough averages, and actual costs can vary based on factors such as location, vehicle make and model, and labor rates at auto repair shops. It's recommended to obtain quotes from local shops for a more accurate estimate.
Need more information about the P128D 2014 GMC Sierra code?
Need more information on how to fix the P128D 2014 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P128D 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P128D 2014 GMC Sierra Code
1. What does the OBDII code P128D mean on a 2014 GMC Sierra?
P128D indicates that the Fuel Rail Temperature Sensor 2 is sending an incorrect or inconsistent signal message counter to the engine control module (ECM).
2. What are the symptoms of a P128D code in a 2014 GMC Sierra?
Symptoms may include poor engine performance, reduced fuel efficiency, rough idling, possible engine stalling, or an illuminated check engine light.
3. What causes the P128D code to appear?
Common causes include a faulty fuel rail temperature sensor, wiring issues such as damaged or corroded connectors, or a malfunction in the ECM.
4. Can I drive my 2014 GMC Sierra with a P128D code?
Driving with a P128D code is not recommended as it may cause poor engine performance and could potentially lead to further damage if not addressed.
5. How do I diagnose a P128D code on a 2014 GMC Sierra?
Start by inspecting the wiring and connectors for the fuel rail temperature sensor for damage or corrosion. Use a scan tool to monitor sensor data and verify signal consistency.
6. How is the P128D code fixed in a 2014 GMC Sierra?
Repairs may include replacing the fuel rail temperature sensor, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.
7. How much does it cost to repair a P128D code?
The cost can vary, but replacing a fuel rail temperature sensor typically ranges from $100 to $300, including parts and labor. Wiring repairs or ECM replacement may cost more.
8. What tools are needed to fix the P128D code?
You may need a multimeter to test wiring, a scan tool to read live data and clear the code, and basic hand tools for sensor replacement.
9. Can a dirty fuel system cause a P128D code?
A dirty fuel system is unlikely to directly cause a P128D code, but maintaining clean fuel injectors and filters is important for overall engine performance.
10. Will clearing the P128D code fix the issue?
Clearing the code may temporarily turn off the check engine light, but the underlying issue must be addressed to prevent the code from returning.
Discuss the causes and fixes for P128D 2014 GMC Sierra OBDII Code
Code P128D 2014 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.