C0248 Code Explained: Causes, Symptoms & Requested Engine Torque Reduction Signal Performance Fixes

C0248 Code Explained: Causes, Symptoms & Requested Engine Torque Reduction Signal Performance Fixes

If your scan tool displays C0248, your vehicle’s Electronic Brake Control Module (EBCM) has detected that the Engine Control Module (ECM/PCM) did not respond correctly to a requested engine torque reduction command.

Modern traction control and stability control systems rely on constant communication between the ABS module and the engine computer. When wheel slip is detected, the EBCM requests that the ECM temporarily reduce engine torque by adjusting the electronic throttle, ignition timing, fuel delivery, or turbocharger boost.

The C0248 code is stored when the EBCM determines the requested torque reduction was not achieved, was delayed, or did not match the expected amount. As a result, the vehicle may disable Traction Control and Electronic Stability Control (ESC/StabiliTrak) until the fault is repaired.

For additional chassis diagnostics and repair guides, visit our Complete OBD-II Trouble Code Guide:

https://my.prostreetonline.com/dtc-obdii

Quick Facts

ItemInformation
OBD-II CodeC0248
DescriptionRequested Engine Torque Reduction Signal Performance
CategoryChassis (C) Codes
SystemTraction Control / Electronic Stability Control
Severity★★★☆☆ Moderate
Safe to Drive?Yes, but traction and stability control may not function properly
Common CausesECM communication failure, throttle body issues, CAN bus faults, EBCM failure, PCM software issues
Typical Repair Cost$100–2,000

What Does C0248 Mean?

The C0248 code indicates that the Electronic Brake Control Module (EBCM) requested an engine torque reduction, but the Engine Control Module (ECM/PCM) failed to respond as expected.

Unlike C0246, which typically indicates an electrical fault in the torque reduction signal circuit, C0248 focuses on system performance. The communication may be functioning normally, but the requested reduction in engine torque either:

  • Did not occur
  • Was insufficient
  • Was delayed
  • Was inconsistent

The EBCM continuously monitors engine response during traction control events. If the engine output doesn’t decrease as commanded, the module stores C0248.

Symptoms of C0248

Common symptoms include:

  • Traction Control warning light
  • Stability Control warning light
  • “Service StabiliTrak” message
  • “Service Traction Control” message
  • ABS warning light (on some vehicles)
  • Reduced traction control performance
  • Excessive wheel spin on slippery roads
  • Stored C0248 diagnostic code

Most drivers will not notice engine performance issues during normal driving.

Common Causes

Faulty Electronic Throttle Body

Because torque reduction often occurs through throttle control, problems with the electronic throttle body are one of the most common causes.

Engine Control Module (ECM) Issues

The ECM may fail to:

  • Process torque requests
  • Adjust throttle position
  • Modify ignition timing
  • Respond within the required timeframe

CAN Bus Communication Problems

Intermittent communication between the:

  • EBCM
  • ECM
  • Transmission Control Module (TCM)

may prevent proper torque reduction.

Electronic Brake Control Module Failure

A malfunctioning EBCM may incorrectly calculate or transmit torque reduction requests.

PCM Software Problems

Some manufacturers have released software updates that improve traction control communication and eliminate false C0248 codes.

Low Battery Voltage

Insufficient system voltage can slow module communication and interfere with electronic throttle operation.

How Serious Is C0248?

Moderate.

Normal braking remains available, but traction control and stability control may not function correctly during low-traction driving.

The code is generally not an immediate safety hazard on dry roads but should be repaired promptly.

Can You Drive With C0248?

Yes.

The vehicle usually operates normally, but you may experience:

  • Increased wheel spin
  • Reduced stability control intervention
  • Less effective traction control
  • Poorer handling on snow, rain, or gravel

Exercise additional caution in adverse weather.

How to Diagnose C0248

1. Scan All Control Modules

Check for:

  • ABS codes
  • Powertrain codes
  • Communication (U-series) codes
  • Electronic throttle codes

Additional codes often identify the root cause.

2. Inspect Live Data

Monitor:

  • Requested engine torque
  • Actual engine torque
  • Throttle position
  • Accelerator pedal position
  • Traction control requests

Compare requested versus actual torque reduction.

3. Inspect the Electronic Throttle Body

Verify:

  • Smooth throttle movement
  • No carbon buildup
  • Proper electronic operation
  • Correct throttle position sensor readings

4. Check CAN Communication

Inspect:

  • CAN wiring
  • Connectors
  • Module communication
  • Network integrity

5. Verify Battery and Charging System

Confirm:

  • Battery voltage
  • Alternator output
  • Ground integrity

Voltage issues commonly trigger communication-related faults.

6. Check for Software Updates

Review manufacturer service bulletins for:

  • ECM calibration updates
  • EBCM updates
  • Traction control software revisions

Common Repairs

RepairEstimated Cost
Clean electronic throttle body$100–200
Replace throttle body$350–900
Repair CAN wiring$100–300
Battery replacement$150–350
ECM software update$100–250
Replace Electronic Brake Control Module$800–1,800
Replace ECM$900–2,000

Common Diagnostic Mistakes

Technicians often:

  • Replace the EBCM before diagnosing throttle body faults.
  • Ignore throttle position sensor data.
  • Overlook low battery voltage.
  • Miss related communication codes.
  • Fail to install available software updates.

Vehicles Commonly Affected

C0248 is commonly found on:

  • Chevrolet Silverado
  • GMC Sierra
  • Chevrolet Tahoe
  • GMC Yukon
  • Cadillac Escalade
  • Chevrolet Traverse
  • Buick Enclave
  • GMC Acadia
  • Chevrolet Malibu
  • Pontiac G8
  • Saturn Outlook

GM vehicles equipped with StabiliTrak commonly report C0248, although similar manufacturer-specific codes exist on other brands.

How to Prevent C0248

Reduce the likelihood of C0248 by:

  • Cleaning the electronic throttle body periodically.
  • Maintaining battery and charging system health.
  • Repairing communication wiring promptly.
  • Keeping module connectors dry.
  • Installing manufacturer software updates.
  • Addressing check engine and traction control warnings immediately.

Frequently Asked Questions

What causes C0248?

The most common causes include a faulty electronic throttle body, ECM problems, CAN communication faults, EBCM failure, outdated software, or low battery voltage.

Is C0248 dangerous?

Usually not.

The vehicle remains drivable, but traction control and stability control performance may be significantly reduced.

Can a throttle body cause C0248?

Yes.

Electronic throttle body problems are among the most common causes because the ECM frequently uses throttle control to reduce engine torque.

Will C0248 clear itself?

No.

The underlying performance issue must be corrected before the code clears.

Does C0248 affect engine performance?

Usually only during traction control events.

Normal engine operation is generally unaffected during everyday driving.

Final Thoughts

The C0248 code indicates the Engine Control Module did not provide the expected engine torque reduction requested by the Electronic Brake Control Module. Although the vehicle usually remains fully drivable, traction control and stability control may not intervene properly during slippery driving conditions.

Most repairs involve diagnosing the electronic throttle body, checking CAN bus communication, verifying battery voltage, updating module software, or repairing faults within the EBCM or ECM. A complete network scan and live data analysis should always be performed before replacing expensive control modules.

For additional chassis diagnostics and repair guides, browse our complete Chassis (C) OBD-II Code Library:

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