AutoCodes – Cadillac – P1A64 Cadillac

P1A64 Cadillac Code - Starter/Generator Control Module Reset

Quick Answer

What it means: P1A64 Cadillac indicates Starter/Generator Control Module Reset.
Common causes: Common causes include Faulty, harness is open or shorted, 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 820

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 19, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A64 Cadillac Description

The purpose of the Accessory Power Module (APM), integral to the Starter/Generator Control Module (SGCM), is to control the amount and direction of energy flowing between the 42 V DC and 14 V DC buses via the APM, bi-directional 42 V DC to 14 V DC converter. All APM functions will only be run when in the enable mode. APM current will be defined as the current flowing through the outputs. APM power is bi-directional, with negative current representing 14-42 direction, and positive current representing the 42-14 direction.
When the APM Power Conversion direction is set to a value of 42 V to 14 V, the energy will flow from the 42 V DC Bus to the 14 V DC Bus via the APM. When the Service Charge or jump starting is requested, the energy will flow from the 14 V DC Bus to the 42 V DC Bus via the APM. When the APM Power Conversion direction is set to a value of Off, the APM will be turned off, and not consume or transfer any power. When the APM Power Conversion direction is set to a value of Invalid, the energy will flow from the 42 V DC Bus to the 14 V DC Bus via the APM.

OBDII Code P1A64 Cadillac - Starter/Generator Control Module Reset - AutoCodes.com — P1A64 Cadillac Code - Starter/Generator Control Module Reset

What does this mean?

What are the Possible Causes of the DTC P1A64 Cadillac?

Faulty
harness is open or shorted
circuit poor electrical connection

How to Fix the DTC P1A64 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 P1A64 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.

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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 P1A64 Cadillac Code

1. What are common symptoms of OBDII code P1A64 in a Cadillac related to the Starter/Generator Control Module Reset?

- Common symptoms include issues with starting the vehicle, poor acceleration, and reduced fuel efficiency.

2. What could cause the OBDII code P1A64 to trigger in a Cadillac?

- The code P1A64 typically triggers due to a fault in the starter/generator control module or issues with the control module reset process.

3. How can I diagnose the OBDII code P1A64 in my Cadillac?

- Diagnosing the code P1A64 may involve using a diagnostic scanner to read the code, checking the starter/generator control module for faults, and inspecting related wiring and connections.

4. Is it safe to continue driving my Cadillac with the OBDII code P1A64 present?

- It is not recommended to drive your Cadillac with the code P1A64 present, as it can lead to further damage and potential safety risks.

5. Can I reset the Starter/Generator Control Module on my Cadillac to clear the OBDII code P1A64?

- It is not advisable to simply reset the Starter/Generator Control Module to clear the code P1A64. Proper diagnosis and repair of the underlying issue is recommended.

6. How much does it typically cost to repair the OBDII code P1A64 in a Cadillac?

- Repair costs for the code P1A64 can vary depending on the specific issue, but it may involve replacing the starter/generator control module or addressing wiring/connectivity issues.

7. Are there any DIY tips for addressing the OBDII code P1A64 in a Cadillac?

- DIY tips may include checking for loose connections, ensuring proper battery voltage, and inspecting the control module for visible damage before seeking professional help.

8. Can weather conditions affect the triggering of the OBDII code P1A64 in a Cadillac?

- Extreme weather conditions, such as very cold temperatures, can potentially impact the performance of the starter/generator system and contribute to the code P1A64 triggering.

9. Is the OBDII code P1A64 specific to Cadillac vehicles, or can it occur in other car makes/models?

- While the code P1A64 is associated with Cadillac vehicles, similar issues related to starter/generator control modules can occur in other car makes and models as well.

10. How long does it typically take to repair the OBDII code P1A64 in a Cadillac?

- The repair time for the code P1A64 can vary depending on the complexity of the issue, availability of parts, and the expertise of the technician, but it may take a few hours to a day.