AutoCodes – GMC – P1255 2014 GMC Sierra

P1255 2014 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 2014 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 257

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 2014 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 2014 GMC Sierra - Fuel Pump Control Module Driver High Temperature - AutoCodes.com — P1255 2014 GMC Sierra Code - Fuel Pump Control Module Driver High Temperature

What does this mean?

What are the Possible Causes of the DTC P1255 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the P1255 2014 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 2014 GMC Sierra Code

What does OBDII code P1255 mean for a 2014 GMC Sierra?

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

What are the common symptoms of code P1255 in a 2014 GMC Sierra?

Symptoms may include difficulty starting the engine, reduced engine performance, poor fuel efficiency, or the engine stalling.

What causes the P1255 code to trigger?

Common causes include an overheating fuel pump control module, electrical issues such as short circuits or damaged wiring, or a malfunctioning fuel pump.

Can I drive my 2014 GMC Sierra with code P1255 active?

Itâ€™s not recommended to drive with this code active, as it could lead to further damage to the fuel pump system or leave you stranded due to engine failure.

How do mechanics diagnose code P1255?

Technicians typically inspect the fuel pump control module, wiring, and connectors for damage, test the fuel pump circuit, and monitor temperature readings using a scan tool.

What repairs are needed to fix code P1255?

Repairs may include replacing the fuel pump control module, repairing or replacing damaged wiring, or addressing any overheating issues in the fuel pump system.

How much does it cost to fix the P1255 code on a 2014 GMC Sierra?

Repair costs vary but may range from $300 to $700, depending on whether the fuel pump control module or wiring needs repair or replacement.

Can a faulty fuel pump cause code P1255?

Yes, a malfunctioning or overloaded fuel pump can cause the fuel pump control module to overheat, triggering the P1255 code.

How can I prevent code P1255 from recurring?

Regular maintenance, inspecting wiring and connections for damage, and ensuring the fuel pump is operating correctly can help prevent this code from recurring.

Does the P1255 code require reprogramming the fuel pump control module?

In some cases, reprogramming or updating the fuel pump control module software may be necessary after repairs, depending on the diagnostic findings.