P1255 2018 GMC Sierra Code - Fuel Pump Control Module Driver High Temperature
Quick Answer
The P1255 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Fuel Pump Control Module (FPCM) driver high temperature. Common causes include Malfunctioning fuel pump, Wiring issues or shorts in the FPCM circuit, Faulty Fuel Pump Control Module. 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
- P1255 2018 GMC Sierra indicates Fuel Pump Control Module Driver High Temperature.
- Common causes
- Common causes include Malfunctioning fuel pump, Wiring issues or shorts in the FPCM circuit, Faulty Fuel Pump Control Module.
- 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 P1255 2018 GMC Sierra Description
The P1255 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Fuel Pump Control Module (FPCM) driver high temperature. The FPCM is responsible for controlling the fuel pump's operation, ensuring the correct fuel pressure is maintained for the engine's performance. When the FPCM driver temperature is too high, it can lead to malfunctions in the fuel pump control system, potentially causing drivability issues and affecting the vehicle's overall performance.
Common Causes of P1255 2018 GMC Sierra
- Malfunctioning fuel pump
- Wiring issues or shorts in the FPCM circuit
- Faulty Fuel Pump Control Module
- Overheating due to poor ventilation around the FPCM
- High ambient temperatures causing the FPCM to overheat
Symptoms of P1255 2018 GMC Sierra
- Check Engine Light illuminated on the dashboard
- Decreased fuel efficiency
- Engine misfires or hesitation during acceleration
- Stalling or difficulty starting the engine
How to Fix P1255 2018 GMC Sierra
- Begin by diagnosing the specific cause of the high temperature in the FPCM driver using a scan tool to read the DTCs and pinpoint the issue.
- Inspect the wiring harness and connections around the FPCM for any signs of damage or corrosion. Repair or replace any damaged wiring.
- Test the fuel pump's operation to ensure it is functioning correctly. Replace the fuel pump if necessary.
- Check the FPCM for proper operation and replace it if it is found to be faulty.
- Ensure proper ventilation around the FPCM to prevent overheating in the future.
Cost to Fix P1255 2018 GMC Sierra
The typical repair costs for addressing a P1255 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a fuel pump can range from $300 to $800, while a new Fuel Pump Control Module may cost between $150 and $400. Labor costs can add an additional $100 to $300, with total repair costs potentially ranging from $500 to $1500. It is advisable to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on the specific diagnosis and repair needed for your vehicle. Labor rates at auto repair shops can vary, so it's essential to consider factors such as location, vehicle make and model, and the complexity of the repair when estimating costs.
Need more information about the P1255 2018 GMC Sierra code?
Need more information on how to fix the P1255 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1255 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1255 2018 GMC Sierra Code
1. What does the OBDII code P1255 mean for a 2018 GMC Sierra?
P1255 indicates that the Fuel Pump Control Module (FPCM) has detected a high temperature condition in the fuel pump driver circuit.
2. What are the common symptoms of code P1255 in a 2018 GMC Sierra?
Symptoms may include difficulty starting the engine, reduced engine performance, stalling, or the check engine light turning on.
3. What causes the P1255 code to appear in a GMC Sierra?
Common causes include an overheated fuel pump, a malfunctioning Fuel Pump Control Module, poor electrical connections, or a failing fuel pump driver.
4. Can I continue driving my 2018 GMC Sierra with a P1255 code?
It is not recommended to continue driving, as this code can indicate potential fuel delivery issues, which may lead to engine damage or stalling.
5. How is P1255 diagnosed in a 2018 GMC Sierra?
A mechanic will use a scan tool to confirm the code, inspect the fuel pump driver circuit and FPCM for damage, and check for poor wiring or excessive heat buildup.
6. What are the possible repairs to resolve code P1255?
Repairs may include replacing the Fuel Pump Control Module, repairing faulty wiring or connections, or replacing the fuel pump if it is overheating.
7. Can a faulty fuel pump cause the P1255 code in a GMC Sierra?
Yes, a failing fuel pump that generates excessive heat can trigger the P1255 code.
8. How much does it cost to fix the P1255 code in a 2018 GMC Sierra?
Repair costs vary but may range from $200 to $800, depending on whether the issue is with the fuel pump, FPCM, or wiring.
9. How can I prevent the P1255 code from occurring again?
Regular maintenance, including inspecting fuel system components and ensuring proper cooling, can help prevent this issue.
10. Is the P1255 code a common issue in the 2018 GMC Sierra?
While not extremely common, it can occur if the fuel pump or control module experiences excessive heat or electrical issues.
Discuss the causes and fixes for P1255 2018 GMC Sierra OBDII Code
Code P1255 2018 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.