What C0242 means
The powertrain control module reports a fault that the ABS module must consider (e.g. traction control engine torque request fault).
Written from public technical sources and not yet checked by a mechanic. How we write these pages
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
- Traction control torque request fault Most likely
- Bus communication loss Possible
How to diagnose C0242
- Read every stored code with an OBD-II scanner. If misfire or fuel trim codes are there too, fix those first: they often cause this one.
- Inspect the parts involved: powertrain control module, abs control module, communication bus.
- Work through the causes above from most to least likely, cheapest checks first.
- Clear the code and drive a full drive cycle to confirm the repair held.
Vehicles that report C0242 most
| Vehicle | Years | Reports | Share | Median miles |
|---|---|---|---|---|
| Chevrolet Malibu | 2006–2017 | 6 | 60k |
Counts of owner complaints to the NHTSA that mention C0242 (13 in total), not failure rates: popular models get more complaints simply because more of them are on the road. Models with fewer than 3 complaints are left out.
Reading the code
- C
- Chassis
- 0
- Generic (SAE) code
- 242
- Specific fault
Questions drivers ask
Can I drive with code C0242?
Usually yes, carefully. Your hydraulic brakes normally keep working, but ABS, traction and stability control may be off, so the wheels can lock in a hard stop. If the red brake warning light is on, the pedal feels soft or different, or the car takes longer to stop, don't drive: have it towed.
Often reported together
Codes that owners mention in the same NHTSA complaints as C0242. They can point to a shared cause, so it's worth checking them together.
This page is general information, not a substitute for a professional diagnosis. Repair costs are rough estimates for parts and labor and vary by vehicle and region.