AutoCodes – Generic – C12E9

C12E9 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 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.

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Code Popularity 1,293

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 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C12E9 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 - ABS Pump Motor Stuck On - AutoCodes.com — C12E9 Code - ABS Pump Motor Stuck On

What does this mean?

What are the Possible Causes of the DTC C12E9?

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?

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 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 code?

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

Need Help with the Code?

Get the C12E9 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C12E9 Buick — ABS Pump Motor Stuck On
C12E9 Cadillac — ABS Pump Motor Stuck On
C12E9 Chevrolet — ABS Pump Motor Stuck On
C12E9 GMC — ABS Pump Motor Stuck On

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 Code

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

The common symptoms include the ABS warning light staying on, the ABS system continuously running, and potential issues with braking performance.

2. What could cause the ABS Pump Motor to be stuck on triggering code C12E9?

Possible causes include a malfunctioning ABS pump motor, a faulty ABS module, wiring issues, or a problem with the wheel speed sensors.

3. How serious is OBDII code C12E9 - ABS Pump Motor Stuck On?

This code indicates a malfunction in the ABS system, which can affect the vehicle's ability to brake properly and may compromise safety. It is important to address this issue promptly.

4. Can driving with OBDII code C12E9 - ABS Pump Motor Stuck On be dangerous?

Driving with this code active can be dangerous as it may lead to compromised braking performance, especially in emergency situations or slippery road conditions. It is recommended to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose the cause of OBDII code C12E9 - ABS Pump Motor Stuck On?

Diagnosing the issue may involve performing a visual inspection of the ABS system components, checking the wiring and connections, and using a diagnostic scanner to read specific ABS codes and data.

6. Is it possible to repair OBDII code C12E9 - ABS Pump Motor Stuck On without professional help?

While some basic checks like inspecting connections and fuses can be done by DIY enthusiasts, diagnosing and repairing complex ABS system issues may require professional expertise and specialized tools.

7. What are some tips for repairing OBDII code C12E9 - ABS Pump Motor Stuck On?

Repair tips may include checking and cleaning ABS sensors, inspecting wiring for damage, testing the ABS pump motor, and ensuring proper communication between ABS system components.

8. Can resetting the OBDII system clear code C12E9 - ABS Pump Motor Stuck On?

Resetting the OBDII system may temporarily clear the code, but it is likely to return if the underlying issue with the ABS pump motor being stuck on is not addressed.

9. How much does it typically cost to repair OBDII code C12E9 - ABS Pump Motor Stuck On?

The cost of repairing this issue can vary depending on the specific cause, parts needed, labor rates, and whether professional diagnostic services are required. It is advisable to obtain estimates from reputable repair shops.

10. Will ignoring OBDII code C12E9 - ABS Pump Motor Stuck On lead to further damage?

Ignoring this code can potentially lead to further damage to the ABS system, reduced braking efficiency, and safety risks. It is recommended to address ABS system issues promptly to avoid costly repairs and ensure safe driving.