AutoCodes – GMC – P1255 2016 GMC Sierra

P1255 2016 GMC Sierra Code - Fuel Pump Control Module Driver High Temperature

Quick Answer

The Engine Control Module (ECM) supplies voltage to the fuel pump control module when the ECM detects that the ignition is on. Common causes include Faulty Fuel Pump Control Module, Fuel Pump Control Module harness is open or shorted, Fuel Pump Control Module 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: P1255 2016 GMC Sierra indicates Fuel Pump Control Module Driver High Temperature.
Common causes: Common causes include Faulty Fuel Pump Control Module, Fuel Pump Control Module harness is open or shorted, Fuel Pump Control Module 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.

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Code Popularity 145

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 17, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1255 2016 GMC Sierra Description

The Engine Control Module (ECM) supplies voltage to the fuel pump control module when the ECM detects that the ignition is on. The voltage from the ECM to the fuel pump control module remains for 2 seconds unless the engine is cranked or run. While this voltage is being received, the fuel pump control module supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel pressure. The Diagnostic Trouble Code (DTC) will be set if the fuel pump control module detects an over-temperature fault.

OBDII Code P1255 2016 GMC Sierra - Fuel Pump Control Module Driver High Temperature - AutoCodes.com — P1255 2016 GMC Sierra Code - Fuel Pump Control Module Driver High Temperature

What does this mean?

What are the Possible Causes of the DTC P1255 2016 GMC Sierra?

Faulty Fuel Pump Control Module
Fuel Pump Control Module harness is open or shorted
Fuel Pump Control Module circuit poor electrical connection

How to Fix the DTC P1255 2016 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 P1255 2016 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 P1255 2016 GMC Sierra code?

Need more information on how to fix the P1255 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1255 2016 GMC Sierra Code

1. What does the OBDII code P1255 mean on a 2016 GMC Sierra?

P1255 indicates that the Fuel Pump Control Module (FPCM) has detected a high temperature condition in its driver circuit.

2. What are the common symptoms of code P1255 on a 2016 GMC Sierra?

Symptoms may include engine stalling, difficulty starting, reduced engine performance, or the check engine light illuminating.

3. What causes the P1255 code to appear on a GMC Sierra?

Common causes include an overheating fuel pump, excessive electrical resistance in the circuit, a faulty Fuel Pump Control Module, or poor ventilation around the module.

4. Can I drive my 2016 GMC Sierra with a P1255 code?

Driving with this code is not recommended, as it could lead to engine stalling or failure of the fuel system, potentially leaving you stranded.

5. How do you diagnose the P1255 code on a GMC Sierra?

Diagnosis typically involves using a scan tool to confirm the code, inspecting the Fuel Pump Control Module and wiring for damage, and checking for proper voltage and cooling.

6. What repairs are needed to fix the P1255 code on a 2016 GMC Sierra?

Repairs may include replacing the Fuel Pump Control Module, fixing damaged wiring or connectors, or addressing a failing fuel pump.

7. How much does it cost to repair the P1255 code on a GMC Sierra?

Repair costs vary but can range from $200 to $600, depending on whether the issue is with the module, wiring, or fuel pump.

8. Can a dirty fuel filter cause the P1255 code?

A clogged or dirty fuel filter is unlikely to cause this specific code, but it can lead to fuel pump stress, contributing to overheating.

9. How can I prevent the P1255 code from recurring on my GMC Sierra?

Regular maintenance, ensuring proper ventilation around the Fuel Pump Control Module, and addressing electrical issues promptly can help prevent this code.

10. Does the P1255 code require reprogramming the Fuel Pump Control Module?

In some cases, reprogramming or updating the moduleâ€™s software may be necessary after replacement to ensure proper operation.