P128F 2018 Chevrolet Silverado Code - Fuel Rail Pressure Sensors 1 and 2 Signals Message Counter Incorrect
Quick Answer
The P128F diagnostic trouble code for a 2018 Chevrolet Silverado indicates that there is an issue with the Fuel Rail Pressure Sensors 1 and 2 Signals Message Counter being incorrect. Common causes include Faulty fuel rail pressure sensors, Wiring or connector issues in the sensor circuit, ECM software malfunction. 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 2018 Chevrolet Silverado indicates Fuel Rail Pressure Sensors 1 and 2 Signals Message Counter Incorrect.
- Common causes
- Common causes include Faulty fuel rail pressure sensors, Wiring or connector issues in the sensor circuit, ECM software malfunction.
- 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 P128F 2018 Chevrolet Silverado Description
The P128F diagnostic trouble code for a 2018 Chevrolet Silverado indicates that there is an issue with the Fuel Rail Pressure Sensors 1 and 2 Signals Message Counter being incorrect. This means that the signals being sent by the fuel rail pressure sensors are not matching the expected values, which can lead to various performance issues in the vehicle. The fuel rail pressure sensors are crucial components that monitor the pressure in the fuel rail and provide this information to the engine control module (ECM) for optimal fuel delivery. When the signals from these sensors are incorrect, it can result in poor fuel economy, rough idle, hesitation during acceleration, and potentially even stalling.
Common Causes of P128F 2018 Chevrolet Silverado
- Faulty fuel rail pressure sensors
- Wiring or connector issues in the sensor circuit
- ECM software malfunction
- Fuel system contamination
- Low fuel pressure
Symptoms of P128F 2018 Chevrolet Silverado
- Decreased fuel efficiency
- Rough idle
- Hesitation or lack of power during acceleration
- Engine stalling
- Check Engine Light illuminated
How to Fix P128F 2018 Chevrolet Silverado
- Diagnose the issue by using a scan tool to read the codes and monitor the fuel rail pressure sensor signals.
- Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
- Test the fuel rail pressure sensors to ensure they are functioning correctly, replacing them if needed.
- Check and clean the fuel system to remove any contamination that may be affecting the sensors.
- Clear the codes, reset the ECM, and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P128F 2018 Chevrolet Silverado
The cost of repairing the Fuel Rail Pressure Sensors 1 and 2 Signals Message Counter Incorrect code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. On average, the cost of replacing faulty sensors and addressing wiring or connector issues can range from $200 to $500. Additional costs may be incurred if other components need to be replaced or if extensive diagnostic work is required. It is recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on the specific circumstances of the vehicle. Labor rates at auto repair shops typically range from $80 to $150 per hour.
Need more information about the P128F 2018 Chevrolet Silverado code?
Need more information on how to fix the P128F 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P128F 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P128F 2018 Chevrolet Silverado Code
1. What does the OBDII code P128F mean on a 2018 Chevrolet Silverado?
P128F indicates an issue with the fuel rail pressure sensors 1 and 2, specifically a mismatch or incorrect signal message counter.
2. What are the common symptoms of code P128F in a 2018 Chevrolet Silverado?
Symptoms can include poor engine performance, reduced fuel efficiency, difficulty starting, or the Check Engine Light being illuminated.
3. What causes the P128F code to appear in a 2018 Chevrolet Silverado?
The code is typically caused by a faulty fuel rail pressure sensor, damaged wiring, poor electrical connections, or software-related issues in the engine control module (ECM).
4. Can a bad fuel pump trigger the P128F code?
While a failing fuel pump itself may not directly trigger P128F, it could cause abnormal fuel pressure readings, which might contribute to the issue.
5. How is the P128F code diagnosed?
A technician will use a scan tool to verify the code, inspect the fuel rail pressure sensors and wiring, and compare actual fuel pressure readings with the expected values.
6. Is it safe to drive with the P128F code on a 2018 Chevrolet Silverado?
Driving with this code may lead to poor performance or potential engine damage. It’s best to address the issue promptly.
7. How can I fix the P128F code on my 2018 Chevrolet Silverado?
Repairs may involve replacing a faulty fuel rail pressure sensor, repairing damaged wiring, or updating the ECM software.
8. Can clearing the code fix the P128F issue?
Clearing the code without addressing the root cause may temporarily turn off the Check Engine Light, but the issue will likely return.
9. How much does it cost to fix the P128F code?
Repair costs can vary, but replacing a fuel rail pressure sensor typically ranges from $150 to $400, including parts and labor.
10. Can a software update resolve the P128F code in a 2018 Chevrolet Silverado?
Yes, in some cases, a reprogramming or software update for the ECM may resolve the issue if it’s related to incorrect signal processing.
Discuss the causes and fixes for P128F 2018 Chevrolet Silverado OBDII Code
Code P128F 2018 Chevrolet Silverado 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.