AutoCodes – Chevrolet – P12A8 Chevrolet

P12A8 Chevrolet 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 Chevrolet 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.

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Code Popularity 10,019

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 Sep 27, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P12A8 Chevrolet 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 Chevrolet - Fuel Pump Control Status Signal Message Counter Incorrect - AutoCodes.com — P12A8 Chevrolet Code - Fuel Pump Control Status Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P12A8 Chevrolet?

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

How to Fix the DTC P12A8 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the P12A8 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P12A8 2014 Chevrolet Silverado — Fuel Pump Control Status Signal Message Counter Incorrect
P12A8 2015 Chevrolet Silverado — Fuel Pump Control Status Signal Message Counter Incorrect
P12A8 2016 Chevrolet Silverado — Fuel Pump Control Status Signal Message Counter Incorrect
P12A8 2017 Chevrolet Silverado — Fuel Pump Control Status Signal Message Counter Incorrect
P12A8 2018 Chevrolet Silverado — Fuel Pump Control Status Signal Message Counter Incorrect

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 Chevrolet Code

What does the OBDII code P12A8 mean for my Chevrolet?

The P12A8 code indicates that there is an incorrect message count from the fuel pump control status signal, which may affect fuel delivery and engine performance.

What are the common symptoms of the P12A8 code?

Common symptoms include poor engine performance, difficulty starting the engine, fuel pump operation issues, and illumination of the check engine light.

What could cause the P12A8 code to trigger?

Causes may include a faulty fuel pump control module, issues with wiring or connectors, a malfunctioning fuel pump, or problems in the vehicle's communication network.

How can I diagnose the P12A8 code?

To diagnose the P12A8 code, use an OBD-II scanner to confirm the code, inspect the fuel pump control module and wiring, check for other related codes, and perform tests on the fuel pump.

What repairs are typically needed for the P12A8 code?

Repairs may involve replacing a faulty fuel pump control module, fixing wiring or connector issues, or replacing the fuel pump if it is found to be malfunctioning.

Can I drive my Chevrolet with the P12A8 code?

While it is possible to drive with the P12A8 code, it is not recommended due to potential engine performance issues and the risk of being stranded if the fuel pump fails.

How can I clear the P12A8 code after repairs?

You can clear the P12A8 code using an OBD-II scanner to erase trouble codes from the vehicle's computer, or by disconnecting the battery for a few minutes, although the latter is not always recommended as it can reset other settings.

Will the P12A8 code affect my fuel economy?

Yes, if the fuel pump control system is not functioning correctly, it can lead to poor fuel delivery, which may negatively impact fuel economy.

Is the P12A8 code serious?

Yes, the P12A8 code indicates a problem with the fuel pump control system that can lead to engine performance issues. It is advisable to address it promptly to avoid further complications.