AutoCodes – GMC – P1F59 GMC

P1F59 GMC Code - 14 Volt Power Module Status Terminal Circuit Performance

Quick Answer

The ECM uses two circuits to control and monitor the state of the 14V power module, often referred to as the accessory DC power control module. Common causes include Faulty 14 Volt Power Module, 14 Volt Power Module harness is open or shorted, 14 Volt Power 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: P1F59 GMC indicates 14 Volt Power Module Status Terminal Circuit Performance.
Common causes: Common causes include Faulty 14 Volt Power Module, 14 Volt Power Module harness is open or shorted, 14 Volt Power 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 764

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1F59 GMC Description

The ECM uses two circuits to control and monitor the state of the 14V power module, often referred to as the accessory DC power control module.
The status circuit functions much like the F Terminal circuit on a generator equipped vehicle. A high side driver in the 14V power module applies a duty cycled voltage to the ECM. The duty cycle indicates 14V power module internal temperature and operational condition. The ECM will detect faults on the 14V power module status circuit when the vehicle is ON.

OBDII Code P1F59 GMC - 14 Volt Power Module Status Terminal Circuit Performance - AutoCodes.com — P1F59 GMC Code - 14 Volt Power Module Status Terminal Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1F59 GMC?

Faulty 14 Volt Power Module
14 Volt Power Module harness is open or shorted
14 Volt Power Module circuit poor electrical connection

How to Fix the DTC P1F59 GMC?

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 P1F59 GMC 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 P1F59 GMC code?

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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 P1F59 GMC Code

1. What are the common symptoms of OBDII code P1F59 GMC?

The common symptoms of P1F59 GMC code may include issues with vehicle starting, dimming headlights, electrical system malfunctions, and potential battery draining.

2. What does the OBDII code P1F59 GMC indicate?

OBDII code P1F59 GMC indicates a problem with the 14 Volt Power Module Status Terminal Circuit Performance in the vehicle's electrical system.

3. What are the possible causes of OBDII code P1F59 GMC?

Possible causes of P1F59 GMC code include a faulty 14 Volt Power Module, damaged wiring or connectors in the circuit, or issues with the power module status terminal.

4. How can I diagnose the OBDII code P1F59 GMC?

Diagnosing P1F59 GMC may involve using a diagnostic scanner to read the code, checking the 14 Volt Power Module for proper functioning, inspecting related wiring and connectors, and testing the power module status terminal.

5. Can I drive my vehicle with the OBDII code P1F59 GMC?

It is not recommended to drive your vehicle with an unresolved P1F59 GMC code, as it may lead to further electrical system issues or potential breakdowns.

6. How do I repair OBDII code P1F59 GMC?

Repairing P1F59 GMC may involve replacing the faulty 14 Volt Power Module, repairing or replacing damaged wiring or connectors, and ensuring proper functioning of the power module status terminal.

7. Is it safe to reset the OBDII code P1F59 GMC without fixing the underlying issue?

Resetting the code without fixing the underlying issue may temporarily clear the error code, but it will not resolve the actual problem causing the P1F59 GMC code to trigger.

8. How much does it cost to repair OBDII code P1F59 GMC?

The cost to repair P1F59 GMC can vary depending on the extent of the issue, the parts needed for replacement, and the labor charges at the repair shop. It is recommended to get a diagnosis and quote from a qualified mechanic.

9. Can a DIY enthusiast fix OBDII code P1F59 GMC at home?

While some experienced DIY enthusiasts may be able to diagnose and repair P1F59 GMC at home, it is recommended to seek professional help, especially when dealing with electrical system issues.

10. How often does OBDII code P1F59 GMC occur in GMC vehicles?

The occurrence of P1F59 GMC code in GMC vehicles can vary, but it is relatively uncommon compared to other more frequently reported OBDII codes.