AutoCodes – Lincoln – P1A04 Lincoln

P1A04 Lincoln Code - Generator Shutdown Circuit

Quick Answer

The Transmission Control Module (TCM) continuously monitors the Generator Shutdown (GSDN) circuit and the Controlled Area Network (CAN) signal for a GSDN request from the Powertrain Control Module (PCM). Common causes include GSDN circuit open, Faulty Transmission Control Module (TCM), Faulty Powertrain Control Module (PCM). 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 Lincoln indicates Generator Shutdown Circuit.
Common causes: Common causes include GSDN circuit open, Faulty Transmission Control Module (TCM), Faulty Powertrain Control Module (PCM).
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,006

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1A04 Lincoln Description

The Transmission Control Module (TCM) continuously monitors the Generator Shutdown (GSDN) circuit and the Controlled Area Network (CAN) signal for a GSDN request from the Powertrain Control Module (PCM). This code is set when the PCM requests generator shutdown through the CAN signal or if there is a GSDN circuit fault. The generator inverter will be disabled.

OBDII Code P1A04 Lincoln - Generator Shutdown Circuit - AutoCodes.com — P1A04 Lincoln Code - Generator Shutdown Circuit

What does this mean?

What are the Possible Causes of the DTC P1A04 Lincoln?

GSDN circuit open.
Faulty Transmission Control Module (TCM)
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1A04 Lincoln?

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 Lincoln 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 Lincoln code?

Need more information on how to fix the P1A04 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1A04 Lincoln code diagnosed by a professional: Find a repair shop in your area

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 Lincoln Code

1. What are the common symptoms of OBDII code P1A04 in a Lincoln related to the Generator Shutdown Circuit?

- Common symptoms may include the battery warning light illuminating on the dashboard, loss of power steering, dimming headlights, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1A04 in a Lincoln?

- Potential causes of this code could be a faulty generator, damaged wiring or connectors in the generator circuit, a defective generator control module, or a weak battery.

3. How can I diagnose the OBDII code P1A04 in my Lincoln?

- To diagnose this code, you can use an OBDII scanner to read the code, visually inspect the generator and related components for any visible damage, test the generator output, and check the wiring and connectors for continuity.

4. What repair tips can help fix the OBDII code P1A04 in a Lincoln?

- Repair tips may include replacing a faulty generator, repairing or replacing damaged wiring or connectors, resetting the generator control module, and ensuring the battery is in good condition.

5. Can I drive my Lincoln with the OBDII code P1A04 related to the Generator Shutdown Circuit?

- It is not recommended to drive your Lincoln with this code present, as it could lead to further electrical issues or a dead battery. It is best to address the problem promptly to avoid potential breakdowns.

6. How much does it typically cost to repair OBDII code P1A04 in a Lincoln?

- The cost of repairing this code can vary depending on the specific issue causing it. Repairs may range from a simple wiring fix or connector replacement to a more expensive generator or control module replacement.

7. Are there any preventative measures to avoid OBDII code P1A04 in a Lincoln?

- To prevent this code, it is advisable to perform regular maintenance on your Lincoln, including checking the battery's health, inspecting the generator and related components, and addressing any electrical issues promptly.

8. Can a DIY enthusiast fix OBDII code P1A04 in a Lincoln?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address simpler causes of this code, such as checking and replacing fuses, inspecting wiring, or testing the battery. However, more complex issues may require professional assistance.

9. Will resetting the OBDII code P1A04 in a Lincoln make it go away permanently?

- Resetting the code may temporarily turn off the warning light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is crucial to diagnose and fix the root cause to prevent further issues.

10. How long does it take to repair OBDII code P1A04 in a Lincoln?

- The repair time can vary based on the specific cause of the code and the complexity of the fix. Simple repairs like replacing a fuse or connector may take a short time, while more involved repairs like replacing the generator could take longer.