P128D Buick 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 Buick 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 Buick Description
What are the Possible Causes of the DTC P128D Buick?
- 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 Buick?
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 Buick 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 Buick code?
Need more information on how to fix the P128D Buick code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P128D Buick code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P128D Buick Code
1. What does OBDII code P128D mean on a Buick?
P128D indicates an issue with the Fuel Rail Temperature Sensor 2 Signal, specifically that the message counter value is incorrect.
2. What are the common symptoms of code P128D?
Common symptoms include the Check Engine Light turning on, reduced engine performance, poor fuel efficiency, or difficulty starting the vehicle.
3. What causes the P128D code to appear?
The code can be triggered by a malfunctioning fuel rail temperature sensor, wiring issues, a faulty sensor circuit, or a problem with the vehicle's ECM.
4. Is it safe to drive with a P128D code?
While the vehicle may still run, driving with this code can lead to poor performance or potential damage to the engine if the issue is not resolved.
5. How is the P128D code diagnosed?
A technician will use a scan tool to confirm the code, inspect the fuel rail temperature sensor and its wiring, and test the sensor’s signal and voltage.
6. Can a loose connection cause the P128D code?
Yes, a loose or corroded connection in the sensor wiring or harness can disrupt the signal and trigger this code.
7. How do you fix code P128D on a Buick?
Repairs may include replacing the fuel rail temperature sensor, repairing or replacing damaged wiring, or updating/reprogramming the ECM.
8. How much does it cost to fix a P128D code on a Buick?
The cost varies but typically ranges from $150 to $300, depending on whether the issue involves sensor replacement or wiring repairs.
9. Can a faulty ECM cause the P128D code?
Yes, although rare, a malfunctioning ECM can misinterpret or fail to process the signal from the temperature sensor correctly.
10. Can I clear the P128D code without fixing the issue?
Clearing the code without addressing the root cause may temporarily remove the Check Engine Light, but the issue will likely return.
Discuss the causes and fixes for P128D Buick OBDII Code
Code P128D Buick 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.
