AutoCodes – Buick – P12A8 Buick

P12A8 Buick Code - Fuel Pump Control Status Signal Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Fuel Pump, Fuel Pump harness is open or shorted, Fuel Pump 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
P12A8 Buick indicates Fuel Pump Control Status Signal Message Counter Incorrect.
Common causes
Common causes include Faulty Fuel Pump, Fuel Pump harness is open or shorted, Fuel Pump 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,125
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 27, 2022
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Code P12A8 Buick Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Fuel Pump Control Status Signal Message Counter is Incorrect.
OBDII Code P12A8 Buick - Fuel Pump Control Status Signal Message Counter Incorrect - AutoCodes.com
P12A8 Buick Code - Fuel Pump Control Status Signal Message Counter Incorrect

What are the Possible Causes of the DTC P12A8 Buick?

  • Faulty Fuel Pump
  • Fuel Pump harness is open or shorted
  • Fuel Pump circuit poor electrical connection

How to Fix the DTC P12A8 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 P12A8 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 P12A8 Buick code?

Need more information on how to fix the P12A8 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P12A8 Buick 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 P12A8 Buick Code

1. What are the common symptoms of OBDII code P12A8 in a Buick related to the Fuel Pump Control Status Signal Message Counter?

- Common symptoms may include poor engine performance, decreased fuel efficiency, and potential stalling issues.

2. What causes the OBDII code P12A8 to trigger in a Buick?

- This code is typically triggered when the fuel pump control status signal message counter is reporting incorrect data, which could be due to a faulty fuel pump, wiring issues, or a problem with the fuel pump control module.

3. How serious is the OBDII code P12A8 related to the Fuel Pump Control Status Signal Message Counter in a Buick?

- Ignoring this code can potentially lead to fuel delivery issues, engine stalling, and other performance problems. It is advisable to address this issue promptly.

4. Can a DIY enthusiast repair the OBDII code P12A8 in a Buick themselves?

- Depending on the exact cause of the code, some DIY enthusiasts with automotive repair experience may be able to replace the fuel pump or address wiring issues. However, diagnosing the exact cause may require professional tools and knowledge.

5. How can I diagnose the OBDII code P12A8 in my Buick?

- Diagnosing this code usually involves using an OBDII scanner to retrieve the code, checking the fuel pump and related components for any visible damage, and testing the fuel pump control module.

6. Is it safe to continue driving my Buick with the OBDII code P12A8?

- It is not recommended to continue driving your Buick with this code present, as it can lead to potential engine performance issues and stalling, which can compromise safety.

7. How much does it typically cost to repair the OBDII code P12A8 in a Buick?

- The cost of repairing this code can vary depending on the exact cause, but it may involve replacing the fuel pump, addressing wiring issues, or repairing the fuel pump control module. Costs can range from a few hundred to over a thousand dollars.

8. Can a faulty fuel pump be the sole reason for triggering the OBDII code P12A8 in a Buick?

- Yes, a faulty fuel pump can be a common cause of this code, especially if it is not delivering the correct signals to the fuel pump control module.

9. Are there any preventive measures to avoid the OBDII code P12A8 in a Buick?

- Regular maintenance, including checking the fuel system components, keeping the fuel tank clean, and addressing any fuel pump-related issues promptly, can help prevent this code from appearing.

10. How long does it typically take to repair the OBDII code P12A8 related to the Fuel Pump Control Status Signal Message Counter in a Buick?

- The repair time can vary depending on the exact cause and complexity of the repair. It can range from a couple of hours to a full day, especially if diagnostics and part replacement are required.

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