AutoCodes – GMC – C1243 GMC

C1243 GMC Code - Pump Motor Stalled

Quick Answer

The system relay is energized when the ignition is ON. Common causes include Faulty Brake Pressure Modulator Valve (BPMV), Brake Pressure Modulator Valve (BPMV) harness is open or shorted, Brake Pressure Modulator Valve (BPMV) 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
C1243 GMC indicates Pump Motor Stalled.
Common causes
Common causes include Faulty Brake Pressure Modulator Valve (BPMV), Brake Pressure Modulator Valve (BPMV) harness is open or shorted, Brake Pressure Modulator Valve (BPMV) 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 1,023
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 29, 2020
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Code C1243 GMC Description

The system relay is energized when the ignition is ON. The system relay supplies voltage to the solenoid valves and the pump motor. This voltage is referred to as the system voltage. The Electronic Brake Control Module (EBCM) controls each solenoid valve by grounding the solenoid. The EBCM controls the pump motor by grounding the control circuit. The pump serves 2 purposes:
- Transfers brake fluid from the brake calipers to the master cylinder reservoir during pressure decrease events
- Transfers brake fluid from the master cylinder reservoir to the brake calipers during pressure increase events
OBDII Code C1243 GMC - Pump Motor Stalled - AutoCodes.com
C1243 GMC Code - Pump Motor Stalled

What are the Possible Causes of the DTC C1243 GMC?

  • Faulty Brake Pressure Modulator Valve (BPMV)
  • Brake Pressure Modulator Valve (BPMV) harness is open or shorted
  • Brake Pressure Modulator Valve (BPMV) circuit poor electrical connection
  • Faulty Electronic Brake Control Module (EBCM)

How to Fix the DTC C1243 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 C1243 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 C1243 GMC code?

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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 C1243 GMC Code

1. What are the common symptoms of OBDII code C1243 GMC (Pump Motor Stalled)?

- Common symptoms include the ABS warning light illuminated on the dashboard, loss of ABS functionality, and potential issues with the vehicle's stability control system.

2. What are some possible causes of OBDII code C1243 GMC (Pump Motor Stalled)?

- Potential causes include a faulty ABS pump motor, damaged wiring or connectors in the ABS system, low brake fluid levels, or a malfunctioning ABS control module.

3. How can I diagnose the OBDII code C1243 GMC (Pump Motor Stalled)?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific trouble code, inspecting the ABS system components for any visible damage, and conducting tests to pinpoint the root cause.

4. Is it safe to drive with OBDII code C1243 GMC (Pump Motor Stalled) triggered?

- It is not recommended to drive with this code active, as it can compromise the proper functioning of the ABS system, potentially leading to reduced braking performance and safety risks.

5. What are the repair options for fixing OBDII code C1243 GMC (Pump Motor Stalled)?

- Repair options may involve replacing the ABS pump motor, repairing or replacing damaged wiring or connectors, checking and refilling brake fluid levels, or addressing any issues with the ABS control module.

6. Can I reset the OBDII code C1243 GMC (Pump Motor Stalled) without fixing the underlying issue?

- While you can clear the trouble code with an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reoccurring and ensure the proper functioning of the ABS system.

7. How much does it typically cost to repair OBDII code C1243 GMC (Pump Motor Stalled)?

- Repair costs can vary depending on the specific cause of the issue, the extent of the damage, and the labor rates in your area. It is advisable to consult a professional mechanic for a more accurate estimate.

8. Are there any maintenance tips to prevent OBDII code C1243 GMC (Pump Motor Stalled)?

- Regularly checking and maintaining the ABS system components, such as brake fluid levels and wiring connections, can help prevent issues that may trigger this trouble code.

9. Can a DIY enthusiast fix OBDII code C1243 GMC (Pump Motor Stalled) at home?

- While some basic troubleshooting and repairs can be done at home, diagnosing and fixing complex ABS system issues may require professional expertise and specialized tools. It is recommended to seek professional help if needed.

10. Will ignoring OBDII code C1243 GMC (Pump Motor Stalled) cause further damage to my vehicle?

- Ignoring this trouble code can lead to potential safety hazards, compromised braking performance, and further damage to the ABS system components. It is essential to address the issue promptly to maintain the vehicle's safety and reliability.

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