AutoCodes – GMC – P1A8F GMC

P1A8F GMC Code - 14 Volt Power Module Current Sensor Overcurrent

Quick Answer

The Starter/Generator Control Module (SGCM) monitors the 14-volt power module current sensor for an overcurrent condition to protect the MOSFET. Common causes include Faulty Starter/Generator Control Module (SGCM), Starter/Generator Control Module (SGCM) harness is open or shorted, Starter/Generator Control Module (SGCM) 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: P1A8F GMC indicates 14 Volt Power Module Current Sensor Overcurrent.
Common causes: Common causes include Faulty Starter/Generator Control Module (SGCM), Starter/Generator Control Module (SGCM) harness is open or shorted, Starter/Generator Control Module (SGCM) 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 928

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 Feb 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A8F GMC Description

The Starter/Generator Control Module (SGCM) monitors the 14-volt power module current sensor for an overcurrent condition to protect the MOSFET. In the hardware, an overcurrent protection circuit is used to limit the current, and software monitors for an overcurrent reading in the sensor.

OBDII Code P1A8F GMC - 14 Volt Power Module Current Sensor Overcurrent - AutoCodes.com — P1A8F GMC Code - 14 Volt Power Module Current Sensor Overcurrent

What does this mean?

What are the Possible Causes of the DTC P1A8F GMC?

Faulty Starter/Generator Control Module (SGCM)
Starter/Generator Control Module (SGCM) harness is open or shorted
Starter/Generator Control Module (SGCM) circuit poor electrical connection

How to Fix the DTC P1A8F 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 P1A8F 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 P1A8F 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 P1A8F GMC Code

1. What are common symptoms of OBDII code P1A8F GMC (14 Volt Power Module Current Sensor Overcurrent)?

- A common symptom of this code is the illumination of the check engine light on the dashboard. Other symptoms may include issues with the vehicle's electrical system or performance.

2. What can cause OBDII code P1A8F GMC to trigger?

- This code is typically triggered by a detected overcurrent condition in the 14 Volt Power Module Current Sensor, which measures the current flow in the vehicle's electrical system.

3. How serious is OBDII code P1A8F GMC?

- While this code may not cause immediate drivability issues, it is important to address it promptly to prevent potential damage to the vehicle's electrical components.

4. What are possible repair solutions for OBDII code P1A8F GMC?

- Repair solutions may include inspecting the wiring and connections related to the 14 Volt Power Module Current Sensor, checking the sensor itself for damage, and ensuring the power module is functioning correctly.

5. Can I drive my vehicle with OBDII code P1A8F GMC active?

- It is generally safe to drive the vehicle with this code active, but it is recommended to have the issue diagnosed and repaired as soon as possible to prevent any potential electrical problems.

6. How can I diagnose OBDII code P1A8F GMC at home?

- Diagnosing this code may require specialized diagnostic equipment to test the current sensor and related components. If you're comfortable working on your vehicle, you can start by checking the wiring and connections for any visible damage.

7. Is it possible to reset OBDII code P1A8F GMC without repairs?

- While clearing the code may temporarily turn off the check engine light, it will not fix the underlying issue causing the code to trigger. It is recommended to address the root cause of the problem.

8. Are there any precautions to take when repairing OBDII code P1A8F GMC?

- When working on the electrical system of the vehicle, it is important to disconnect the battery and follow proper safety procedures to avoid electrical shock or damage to components.

9. How much does it cost to repair OBDII code P1A8F GMC at a dealership?

- The cost of repairs for this code can vary depending on the specific cause of the issue and the labor rates at the dealership. It's recommended to get a diagnosis first to determine the exact repair needed.

10. Can OBDII code P1A8F GMC be a recurring issue?

- If the root cause of the code is not properly addressed during repairs, it is possible for it to recur. It's important to ensure that all related components are thoroughly inspected and repaired to prevent future occurrences.