AutoCodes – Hummer – C0243 Hummer

C0243 Hummer Code - Engine Drag Control

Quick Answer

The Electronic Brake Control Module (EBCM) sends a Engine Drag Control (EDC) request via a dedicated data line. Common causes include Faulty Engine Drag Control (EDC), Engine Drag Control (EDC) harness is open or shorted, Engine Drag Control (EDC) 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: C0243 Hummer indicates Engine Drag Control.
Common causes: Common causes include Faulty Engine Drag Control (EDC), Engine Drag Control (EDC) harness is open or shorted, Engine Drag Control (EDC) 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 1,550

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 Jun 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0243 Hummer Description

The Electronic Brake Control Module (EBCM) sends a Engine Drag Control (EDC) request via a dedicated data line. The Powertrain Control Module (PCM) supplies a pull up voltage of 5 volts that the EBCM switches to ground to create the signal. The EBCM receives a serial data message from the PCM indicating that the EDC circuit has failed.

OBDII Code C0243 Hummer - Engine Drag Control - AutoCodes.com — C0243 Hummer Code - Engine Drag Control

What does this mean?

What are the Possible Causes of the DTC C0243 Hummer?

Faulty Engine Drag Control (EDC)
Engine Drag Control (EDC) harness is open or shorted
Engine Drag Control (EDC) circuit poor electrical connection

How to Fix the DTC C0243 Hummer?

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 C0243 Hummer 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.

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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 C0243 Hummer Code

1. What are the common symptoms of OBDII code C0243 in a Hummer related to Engine Drag Control?

The common symptoms include the illumination of the check engine light, difficulty in shifting gears, reduced engine performance, and potential traction control system malfunctions.

2. What are the possible causes of OBDII code C0243 in a Hummer?

Potential causes of this code include a faulty engine drag control module, damaged wiring or connectors, issues with the wheel speed sensors, or a malfunction in the traction control system.

3. How can I diagnose OBDII code C0243 in my Hummer related to Engine Drag Control?

Diagnosis typically involves using a professional OBDII scanner to read the trouble code, conducting a visual inspection of the wiring and connectors, and performing tests on the engine drag control module and related components.

4. Can I drive my Hummer with OBDII code C0243 related to Engine Drag Control?

It is not recommended to drive your vehicle with this code present, as it can lead to safety concerns due to potential traction control system malfunctions and compromised engine performance.

5. Is it safe to continue driving my Hummer if the check engine light is on due to OBDII code C0243?

It is best to address the underlying issue causing the code before continuing to drive your vehicle to prevent any further damage or safety risks.

6. How can I repair OBDII code C0243 in my Hummer related to Engine Drag Control?

Repair options may include replacing the engine drag control module, repairing damaged wiring or connectors, fixing issues with the wheel speed sensors, or addressing any faults in the traction control system.

7. Can a DIY enthusiast fix OBDII code C0243 in a Hummer or should I seek professional help?

Depending on your automotive repair skills and equipment, you may be able to address simpler causes of this code yourself. However, complex issues or component replacements may require professional assistance.

8. Are there any preventative maintenance steps I can take to avoid OBDII code C0243 in my Hummer?

Regularly checking and maintaining the traction control system, wheel speed sensors, and related components can help prevent issues that may trigger this code.

9. Will resetting the OBDII code C0243 in my Hummer make the issue go away?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and fix the root cause of the problem.

10. How much can I expect to spend on repairing OBDII code C0243 in a Hummer related to Engine Drag Control?

The cost of repair can vary depending on the specific cause of the issue, the parts needed, and whether you choose to do the repair yourself or seek professional help. It is advisable to get a diagnostic and repair estimate from a trusted mechanic.