AutoCodes – Cadillac – P1F59 Cadillac

P1F59 Cadillac 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 Cadillac 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 734

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

What does this mean?

What are the Possible Causes of the DTC P1F59 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac code?

Need more information on how to fix the P1F59 Cadillac 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 P1F59 Cadillac Code

1. What does the OBDII code P1F59 for Cadillac mean?

The code P1F59 indicates a problem with the 14 Volt Power Module Status Terminal Circuit Performance in your Cadillac.

2. What are the common symptoms of the P1F59 code in a Cadillac?

Common symptoms include issues with starting the vehicle, dimming or flickering lights, and potential electrical system malfunctions.

3. What are the possible causes of the P1F59 Cadillac trouble code?

The code P1F59 can be triggered by a faulty 14 Volt Power Module, damaged wiring or connectors, or a malfunctioning battery.

4. How can I diagnose the P1F59 code in my Cadillac?

Diagnosis typically involves inspecting the 14 Volt Power Module, checking the wiring and connectors for damage, and testing the battery's voltage and performance.

5. Can I still drive my Cadillac with the P1F59 trouble code?

It is not recommended to drive your Cadillac with the P1F59 code present, as it may lead to further electrical issues or potential vehicle breakdown.

6. How do I repair the P1F59 code in my Cadillac?

Repair may involve replacing the 14 Volt Power Module, repairing or replacing damaged wiring, and ensuring proper connection of all components.

7. Are there any DIY tips for fixing the P1F59 code in a Cadillac?

DIY tips include checking for loose or damaged connections, inspecting the battery for any issues, and consulting the vehicle's repair manual for specific troubleshooting steps.

8. Can a mechanic reset the P1F59 trouble code without fixing the underlying issue?

While a mechanic can clear the code, it is crucial to address the root cause of the problem to prevent the code from reoccurring and ensure the vehicle's proper functioning.

9. Is the P1F59 code specific to certain Cadillac models or years?

The P1F59 code related to the 14 Volt Power Module Status Terminal Circuit Performance can be found in various Cadillac models, but it is essential to consult your vehicle's specific manual for accurate information.

10. What should I do if the P1F59 code persists after repairs have been made on my Cadillac?

If the P1F59 code continues to appear after repairs, it is recommended to have the vehicle rechecked by a qualified mechanic to ensure all issues have been properly resolved.