AutoCodes – Buick – P1A8E Buick

P1A8E Buick Code - 14 Volt Power Module Voltage Sensor Circuit High Voltage

Quick Answer

The Auxiliary Power Module (APM) 12-volt output voltage is used for a 12-volt line APM output voltage control and a 12-volt line voltage sensor rationality check. Common causes include Faulty 14 Volt Power Module Voltage Sensor, 14 Volt Power Module Voltage Sensor harness is open or shorted, 14 Volt Power Module Voltage Sensor 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: P1A8E Buick indicates 14 Volt Power Module Voltage Sensor Circuit High Voltage.
Common causes: Common causes include Faulty 14 Volt Power Module Voltage Sensor, 14 Volt Power Module Voltage Sensor harness is open or shorted, 14 Volt Power Module Voltage Sensor 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 1,203

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 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A8E Buick Description

The Auxiliary Power Module (APM) 12-volt output voltage is used for a 12-volt line APM output voltage control and a 12-volt line voltage sensor rationality check. The Starter/Generator Control Module (SGCM) monitors the voltage sensor for the following:
To detect the failure of the APM 12-volt voltage sensor circuit below valid range.
To detect the failure of the APM 12-volt voltage sensor circuit above valid range.

OBDII Code P1A8E Buick - 14 Volt Power Module Voltage Sensor Circuit High Voltage - AutoCodes.com — P1A8E Buick Code - 14 Volt Power Module Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1A8E Buick?

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

How to Fix the DTC P1A8E Buick?

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 P1A8E Buick 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 P1A8E Buick 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 P1A8E Buick Code

1. What are the common symptoms of OBDII code P1A8E in a Buick?

- Common symptoms include the illumination of the Check Engine Light, decreased fuel efficiency, and potential issues with the vehicle's electrical systems.

2. What does the OBDII code P1A8E Buick mean?

- OBDII code P1A8E in a Buick specifically refers to the 14 Volt Power Module Voltage Sensor Circuit registering high voltage.

3. What are the possible causes of OBDII code P1A8E in a Buick?

- Possible causes include a faulty 14 Volt Power Module, issues with the voltage sensor circuit, wiring problems, or a malfunctioning voltage sensor itself.

4. How can I diagnose the high voltage sensor circuit issue related to code P1A8E in my Buick?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the wiring for any damage or loose connections, and testing the voltage sensor and power module.

5. Can I continue driving my Buick with OBDII code P1A8E present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further electrical issues and potential damage if left unaddressed.

6. How can I repair OBDII code P1A8E in my Buick?

- Repairing this code may involve replacing the faulty 14 Volt Power Module, repairing or replacing the voltage sensor circuit, or addressing any wiring issues as needed.

7. Is it possible to reset OBDII code P1A8E in a Buick without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is important to address the root cause of the problem to prevent the code from reoccurring.

8. Are there any DIY fixes for OBDII code P1A8E in a Buick?

- DIY fixes may include checking and tightening any loose connections, inspecting the wiring for damage, and cleaning the voltage sensor contacts. However, complex repairs may require professional assistance.

9. How much does it typically cost to repair OBDII code P1A8E in a Buick?

- The cost of repair can vary depending on the specific issue, parts needed, and labor costs. It is recommended to consult with a mechanic for an accurate estimate.

10. Can a faulty 14 Volt Power Module cause other issues in my Buick besides triggering code P1A8E?

- Yes, a faulty 14 Volt Power Module can potentially lead to various electrical problems in the vehicle, affecting the overall performance and functionality of different systems.