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P1A04 Saturn Code - Battery Energy Control Module Programming Read Only Memory

Quick Answer

The Battery Energy Control Module (BECM) will diagnose its own systems and determine when a fault condition is present. Common causes include Faulty Battery Energy Control Module (BECM), Battery Energy Control Module (BECM) harness is open or shorted, Battery Energy Control Module (BECM) 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: P1A04 Saturn indicates Battery Energy Control Module Programming Read Only Memory.
Common causes: Common causes include Faulty Battery Energy Control Module (BECM), Battery Energy Control Module (BECM) harness is open or shorted, Battery Energy Control Module (BECM) 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 3,691

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 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A04 Saturn Description

The Battery Energy Control Module (BECM) will diagnose its own systems and determine when a fault condition is present. Diagnostics and system status is communicated from the battery energy control module to the hybrid powertrain control module through serial data. The hybrid powertrain control module is the host controller for diagnostic trouble code (DTC) information. The EBECM monitors to detect an Random Access Memory (RAM), Read Only Memory (ROM), Erasable Programmable Read-Only Memory (EPROM) or controller stack overrun. The EBECM sets the OBDII code when the RAM, ROM, EPROM or controller stack overrun is not to factory specifications.
This diagnostic applies to internal microprocessor integrity conditions within the battery energy control module. This fault is internal to the battery energy control module and no external circuits are involved.

OBDII Code P1A04 Saturn - Battery Energy Control Module Programming Read Only Memory - AutoCodes.com — P1A04 Saturn Code - Battery Energy Control Module Programming Read Only Memory

What does this mean?

What are the Possible Causes of the DTC P1A04 Saturn?

Faulty Battery Energy Control Module (BECM)
Battery Energy Control Module (BECM) harness is open or shorted
Battery Energy Control Module (BECM) circuit poor electrical connection

How to Fix the DTC P1A04 Saturn?

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 P1A04 Saturn 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 P1A04 Saturn 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 P1A04 Saturn Code

1. What does the OBDII code P1A04 mean on a Saturn?

The P1A04 code indicates an issue with the Battery Energy Control Module's Programming Read-Only Memory (PROM), often related to software or calibration problems.

2. What are the common symptoms of the P1A04 code on a Saturn?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, limited hybrid system performance (if applicable), or difficulty charging the battery.

3. What causes the P1A04 code to appear?

The code is usually triggered by corrupted or outdated firmware in the Battery Energy Control Module or a failed attempt to update the module's software.

4. Can the P1A04 code cause drivability issues?

In some cases, it may cause reduced performance or functionality of the battery system, but many vehicles will still operate in a limited mode.

5. How is the P1A04 code diagnosed?

A technician will use a scan tool to confirm the code, check for additional related codes, and verify the firmware version in the Battery Energy Control Module.

6. Can the P1A04 code be fixed with a software update?

Yes, in many cases, reprogramming or updating the Battery Energy Control Module's firmware resolves the issue.

7. Is the P1A04 code specific to Saturn vehicles?

While it is common in Saturn hybrid models, this code can also appear in other General Motors vehicles using similar battery control modules.

8. What tools are needed to fix the P1A04 code?

A GM-approved scan tool or programming device is required to update or reprogram the Battery Energy Control Module.

9. Can I drive my Saturn with the P1A04 code?

While the vehicle might still be drivable, it is recommended to address the code promptly to avoid potential battery system damage or performance issues.

10. How much does it cost to fix the P1A04 code?

Costs vary depending on the dealership or repair shop, but reprogramming the module typically ranges from $100 to $300, depending on labor rates.