AutoCodesGMC – C0298 GMC

C0298 GMC Code - Powertrain Control Module Indicates Traction Control Malfunction

Quick Answer

The Electronic Brake Control Module (EBCM) and the Powertrain Control Module (PCM) simultaneously control the traction control. Common causes include Faulty Electronic Brake Control Module (EBCM), Faulty Powertrain Control Module (PCM), EBCM harness is open or shorted. 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
C0298 GMC indicates Powertrain Control Module Indicates Traction Control Malfunction.
Common causes
Common causes include Faulty Electronic Brake Control Module (EBCM), Faulty Powertrain Control Module (PCM), EBCM harness is open or shorted.
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 24,035
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 18, 2020
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Code C0298 GMC Description

The Electronic Brake Control Module (EBCM) and the Powertrain Control Module (PCM) simultaneously control the traction control. The EBCM sends a Requested Torque message via a pulse width modulated (PWM) signal to the PCM. The duty cycle of the signal is used to determine how much engine torque the EBCM is requesting the PCM to deliver. Normal values are between 10 and 90 percent duty cycle. The signal should be at 90 percent when traction control is not active and at lower values during traction control activations. The PCM supplies the pull up voltage that the EBCM switches to ground to create the signal.
OBDII Code C0298 GMC - Powertrain Control Module Indicates Traction Control Malfunction - AutoCodes.com
C0298 GMC Code - Powertrain Control Module Indicates Traction Control Malfunction

What are the Possible Causes of the DTC C0298 GMC?

  • Faulty Electronic Brake Control Module (EBCM)
  • Faulty Powertrain Control Module (PCM)
  • EBCM harness is open or shorted
  • EBCM circuit poor electrical connection

How to Fix the DTC C0298 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 C0298 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.

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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 C0298 GMC Code

1. What does the OBDII code C0298 mean on a GMC vehicle?

Code C0298 indicates that the Powertrain Control Module (PCM) has detected a malfunction in the traction control system.

2. What are the common symptoms of the C0298 code on a GMC?

Symptoms may include the traction control warning light illuminating, reduced traction performance, erratic braking, or loss of stability under slippery conditions.

3. What causes the C0298 code to appear on a GMC vehicle?

Common causes include faulty wheel speed sensors, damaged wiring, a malfunctioning ABS module, or an internal fault in the Powertrain Control Module (PCM).

4. Can I still drive my GMC with the C0298 code active?

While the vehicle may still be drivable, the traction control system will likely be disabled, which could compromise safety in slippery or low-traction conditions.

5. How do I diagnose the C0298 code on my GMC?

Diagnosis typically involves scanning the vehicle with an OBDII tool, inspecting the wheel speed sensors, wiring, and connectors, and testing the ABS module and PCM for faults.

6. What are the most common repairs for resolving the C0298 code?

Repairs may include replacing a faulty wheel speed sensor, repairing damaged wiring, reprogramming or replacing the ABS module, or addressing PCM issues.

7. Can a low battery or electrical issue trigger the C0298 code?

Yes, an inconsistent power supply or low voltage can interfere with the traction control system and trigger the code.

8. How much does it typically cost to fix a C0298 code on a GMC?

Repair costs can range from $100 to $1,000 depending on the root cause, such as replacing a sensor or reprogramming the PCM.

9. Will clearing the C0298 code with a scanner fix the issue?

Clearing the code may temporarily reset the warning light, but if the underlying issue isn’t fixed, the code will likely return.

10. Can a dirty or misaligned wheel speed sensor cause the C0298 code?

Yes, debris or misalignment can interfere with the sensor's ability to transmit accurate data, potentially triggering the code.

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