AutoCodes – GMC – C12E9 GMC

C12E9 GMC Code - ABS Pump Motor Stuck On

Quick Answer

The ABS Pump Motor is a bi-directional motor and is an internal part of the Brake Pressure Modulator. Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator 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
C12E9 GMC indicates ABS Pump Motor Stuck On.
Common causes
Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator 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 934
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 05, 2020
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code C12E9 GMC Description

The ABS Pump Motor is a bi-directional motor and is an internal part of the Brake Pressure Modulator. There are three solid state relays in the electronic Brake Pressure Modulator that operate the pump. The ABS Pump Motor runs every few brake stops in order to fill the high pressure accumulator with brake fluid. The Anti-Lock Brake System (ABS) Module monitors the ABS Pump Motor. The ABS Module sets the OBDII code when the ABS Pump Motor is not to factory specifications.
OBDII Code C12E9 GMC - ABS Pump Motor Stuck On - AutoCodes.com
C12E9 GMC Code - ABS Pump Motor Stuck On

What are the Possible Causes of the DTC C12E9 GMC?

  • Faulty Brake Pressure Modulator
  • Brake Pressure Modulator harness is open or shorted
  • Brake Pressure Modulator circuit poor electrical connection

How to Fix the DTC C12E9 GMC?

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 C12E9 GMC 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 C12E9 GMC code?

Need more information on how to fix the C12E9 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C12E9 GMC 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 C12E9 GMC Code

1. What are the common symptoms of OBDII code C12E9 GMC ABS Pump Motor Stuck On?

The common symptoms of this code include the ABS warning light staying illuminated on the dashboard, and potential issues with the vehicle's braking system such as a pulsating brake pedal or difficulty stopping.

2. What causes the OBDII code C12E9 GMC ABS Pump Motor Stuck On?

This code is usually triggered by a malfunction in the ABS pump motor relay circuit, a faulty ABS pump motor, or wiring issues related to the ABS system.

3. How can I diagnose the OBDII code C12E9 GMC ABS Pump Motor Stuck On?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific fault codes, conducting a visual inspection of the ABS system components, and testing the ABS pump motor relay and wiring for proper operation.

4. Can I still drive my vehicle with the OBDII code C12E9 GMC ABS Pump Motor Stuck On?

It is not recommended to drive the vehicle with this code active, as it may compromise the effectiveness of the vehicle's braking system and lead to unsafe driving conditions.

5. How do I repair the OBDII code C12E9 GMC ABS Pump Motor Stuck On?

The repair process for this code may involve replacing the ABS pump motor relay, repairing or replacing the ABS pump motor, and addressing any wiring issues in the ABS system.

6. Are there any DIY tips for fixing the OBDII code C12E9 GMC ABS Pump Motor Stuck On?

While some basic troubleshooting steps can be performed by DIY enthusiasts, it is recommended to consult a professional mechanic for accurate diagnosis and repair of this code to ensure proper functionality of the ABS system.

7. Will resetting the OBDII code C12E9 GMC ABS Pump Motor Stuck On make it go away permanently?

Simply resetting the code without addressing the underlying issue will not solve the problem permanently. It is important to diagnose and repair the root cause of the code to prevent it from reoccurring.

8. How much does it cost to fix the OBDII code C12E9 GMC ABS Pump Motor Stuck On?

The cost of fixing this code can vary depending on the specific repairs needed, the labor rates of the mechanic, and the cost of replacement parts. It is recommended to obtain a few quotes from different repair shops for an accurate estimate.

9. Can extreme weather conditions trigger the OBDII code C12E9 GMC ABS Pump Motor Stuck On?

Extreme weather conditions can potentially exacerbate existing issues with the ABS system, leading to the triggering of this code. It is important to maintain the ABS system in good condition to prevent weather-related malfunctions.

10. Is the OBDII code C12E9 GMC ABS Pump Motor Stuck On a common issue in GMC vehicles?

While not extremely common, issues with the ABS system, including the ABS pump motor, can occur in GMC vehicles and may lead to the triggering of this specific OBDII code. Regular maintenance and inspection can help prevent such issues.

Discuss the causes and fixes for C12E9 GMC OBDII Code

Code C12E9 GMC comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play