P128D 2017 GMC Sierra Code - Fuel Rail Temperature Sensor 2 Signal Message Counter Incorrect
Quick Answer
The fuel rail pressure sensor transmits fuel pressure and temperature information by serial data. Common causes include Faulty Fuel Rail Temperature Sensor 2, Fuel Rail Temperature Sensor 2 harness is open or shorted, Fuel Rail Temperature Sensor 2 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
- P128D 2017 GMC Sierra indicates Fuel Rail Temperature Sensor 2 Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Fuel Rail Temperature Sensor 2, Fuel Rail Temperature Sensor 2 harness is open or shorted, Fuel Rail Temperature Sensor 2 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 P128D 2017 GMC Sierra Description
What are the Possible Causes of the DTC P128D 2017 GMC Sierra?
- Faulty Fuel Rail Temperature Sensor 2
- Fuel Rail Temperature Sensor 2 harness is open or shorted
- Fuel Rail Temperature Sensor 2 circuit poor electrical connection
How to Fix the DTC P128D 2017 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 P128D 2017 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.
Need more information about the P128D 2017 GMC Sierra code?
Need more information on how to fix the P128D 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P128D 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P128D 2017 GMC Sierra Code
What does the OBDII code P128D mean on a 2017 GMC Sierra?
1. P128D indicates an issue with the Fuel Rail Temperature Sensor 2, specifically that the signal message counter from the sensor is incorrect or not matching expected parameters. 2.
What are the common symptoms of code P128D in a GMC Sierra?
Symptoms may include reduced engine performance, poor fuel efficiency, hard starting, an illuminated check engine light, or the engine running rough. 3.
What causes the P128D code to appear on a 2017 GMC Sierra?
The code can be triggered by a faulty Fuel Rail Temperature Sensor 2, damaged wiring or connectors, a malfunctioning engine control module (ECM), or software issues in the ECM. 4.
Can I drive my 2017 GMC Sierra with a P128D code?
While the vehicle may still be drivable, it’s not recommended as the issue can lead to poor engine performance and potentially cause further damage. 5.
How do you diagnose a P128D code in a GMC Sierra?
Diagnosis typically involves scanning for codes, inspecting the wiring and connectors of the Fuel Rail Temperature Sensor 2, testing the sensor's output, and checking for ECM updates or faults. 6.
How is the P128D code fixed on a 2017 GMC Sierra?
Repairs may include replacing the Fuel Rail Temperature Sensor 2, repairing damaged wiring or connectors, or reprogramming/updating the ECM. 7.
How much does it cost to fix a P128D code in a GMC Sierra?
Repair costs vary but typically range from $150 to $400 depending on whether the sensor, wiring, or ECM needs repair or replacement. 8.
Can a bad Fuel Rail Temperature Sensor 2 cause other issues?
Yes, a faulty sensor can affect fuel injection timing and engine performance, leading to poor fuel economy and potential engine damage over time. 9.
How can I prevent a P128D code from occurring again?
Regular maintenance, inspecting wiring for damage, and ensuring software updates for the ECM are applied can help prevent this code from recurring. 10.
Will clearing the P128D code fix the problem permanently?
Clearing the code may temporarily turn off the check engine light, but the issue will return if the underlying problem is not resolved.
Discuss the causes and fixes for P128D 2017 GMC Sierra OBDII Code
Code P128D 2017 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.
