C0242 on 2007-2014 Cadillac Escalade — Engine Control Module Indicated Traction Control Malfunction
1 vehicles · 1 makes · $150-$1,800 repair
Most Reported On
C0242 is an OBD-II diagnostic trouble code meaning “Engine Control Module Indicated Traction Control Malfunction.” General Motors chassis code stored by the Electronic Brake Control Module (EBCM). The traction control system reduces wheel spin by asking the Engine Control Module to cut engine torque. C0242 sets when the EBCM is told by the ECM — over the serial data bus — that the ECM cannot honour a torque-reduction request or that its own torque-control path is unreliable. In practice the EBCM sees the ECM report a traction-control-relevant fault (commonly a throttle-actuator or accelerator-pedal-position fault, or an ECM internal/processor fault), so it disables traction control and StabiliTrak, and the ECM independently commands Reduced Engine Power. C0242 is therefore usually a consequence code: the primary fault is almost always a P-code stored in the ECM at the same time. This code is most commonly reported on 2007-2014 Cadillac Escalade, with repair costs ranging from $150 to $1,800.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a chassis code. A basic engine-code reader will not show it — you need a scanner that reads chassis modules. These read C0242.
One caveat that applies to every scanner: only powertrain codes are standardised across manufacturers. Body, chassis and network coverage is "enhanced" diagnostics, and how deep it goes varies by make and model year — check your specific vehicle against the tool's coverage list before buying.
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
FAQ
What does C0242 mean?
C0242 stands for "Engine Control Module Indicated Traction Control Malfunction." General Motors chassis code stored by the Electronic Brake Control Module (EBCM). The traction control system reduces wheel spin by asking the Engine Control Module to cut engine torque. C0242 sets when the EBCM is told by the ECM — over the serial data bus — that the ECM cannot honour a torque-reduction request or that its own torque-control path is unreliable. In practice the EBCM sees the ECM report a traction-control-relevant fault (commonly a throttle-actuator or accelerator-pedal-position fault, or an ECM internal/processor fault), so it disables traction control and StabiliTrak, and the ECM independently commands Reduced Engine Power. C0242 is therefore usually a consequence code: the primary fault is almost always a P-code stored in the ECM at the same time.
What are the most common causes of C0242?
The most common causes of C0242 are: A primary ECM fault set at the same time (throttle actuator control, accelerator pedal position sensor, or ECM internal performance codes such as P0641/P2135), Loose, corroded or broken main negative battery cable / poor engine-to-body ground causing voltage drops on the bus, Failing throttle body or accelerator pedal position sensor, Serial data (GMLAN) wiring or connector faults between ECM and EBCM, Weak battery or failing alternator producing low system voltage, Internal ECM failure. The specific cause varies by vehicle.
How much does it cost to fix C0242?
Repair costs for C0242 range from $150 to $1,800, depending on the vehicle and root cause.
Which vehicles are affected by C0242?
Au7o has documented C0242 across 1 vehicle models from 1 manufacturers: Cadillac.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.