P128F 2015 Chevrolet Silverado Code - Fuel Rail Pressure Sensors 1 and 2 Signals 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 Pressure Sensor, Fuel Rail Pressure Sensor harness is open or shorted, Fuel Rail Pressure 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
- P128F 2015 Chevrolet Silverado indicates Fuel Rail Pressure Sensors 1 and 2 Signals Message Counter Incorrect.
- Common causes
- Common causes include Faulty Fuel Rail Pressure Sensor, Fuel Rail Pressure Sensor harness is open or shorted, Fuel Rail Pressure 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 P128F 2015 Chevrolet Silverado Description
What are the Possible Causes of the DTC P128F 2015 Chevrolet Silverado?
- Faulty Fuel Rail Pressure Sensor
- Fuel Rail Pressure Sensor harness is open or shorted
- Fuel Rail Pressure Sensor circuit poor electrical connection
How to Fix the DTC P128F 2015 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 P128F 2015 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.
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Frequently Asked Questions about P128F 2015 Chevrolet Silverado Code
1. What does the OBDII code P128F mean for a 2015 Chevrolet Silverado?
P128F indicates an issue with the fuel rail pressure sensors 1 and 2, specifically a mismatch or incorrect signal message counter between the two sensors.
2. What are the common symptoms of the P128F code on a 2015 Chevrolet Silverado?
Symptoms may include poor engine performance, reduced fuel efficiency, difficulty starting, or the vehicle entering limp mode. The check engine light will also be illuminated.
3. What causes the P128F code to appear in a 2015 Chevrolet Silverado?
Common causes include faulty fuel rail pressure sensors, wiring or connector issues, a malfunctioning engine control module (ECM), or software-related problems.
4. Can a bad fuel pump cause the P128F code on a 2015 Silverado?
While it’s less likely, a failing fuel pump could indirectly contribute to issues with fuel pressure readings, but the primary cause is usually related to the sensors or their signals.
5. How do I diagnose the P128F code on my 2015 Chevrolet Silverado?
Start by scanning for additional codes, inspecting the wiring and connectors for damage, and testing the functionality of both fuel rail pressure sensors. Check for ECM updates as well.
6. Can I drive my 2015 Chevrolet Silverado with the P128F code?
It’s possible to drive short distances, but it’s not recommended as the issue can lead to poor engine performance and potentially more severe damage if left unresolved.
7. How do I fix the P128F code on a 2015 Chevrolet Silverado?
Repairs may involve replacing one or both fuel rail pressure sensors, repairing damaged wiring, or reprogramming/updating the ECM.
8. How much does it cost to repair the P128F code on a 2015 Chevrolet Silverado?
Repair costs vary depending on the issue. Replacing a single fuel rail pressure sensor typically costs $150-$300, while ECM reprogramming may cost $100-$200 at a dealer.
9. What tools are needed to troubleshoot the P128F code?
A diagnostic scan tool capable of reading live fuel rail pressure data, a multimeter for testing wiring, and possibly software for ECM updates are essential.
10. Can a P128F code clear itself on a 2015 Chevrolet Silverado?
The code may clear temporarily if the issue is intermittent, but the underlying problem will likely return unless properly diagnosed and repaired.
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