C0242
PCM Indicated TCS Malfunction
What it means
C0242. PCM Indicated TCS Malfunction. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Corvette, Camaro.
Findings, check these first
- Accompanying PCM trouble code limiting engine torque
- Engine misfire causing torque reduction
- Delivered torque signal circuit fault between PCM and EBCM
- Class 2 serial data fault between PCM and EBCM
- Aftermarket engine tune altering torque reporting
Standard procedure
- Diagnose all PCM codes first; this code often follows them
- Repair engine misfires or performance faults before touching the ABS
- Inspect the delivered torque and serial data circuits
- Verify torque signal PIDs match between PCM and EBCM
- Clear and retest after the engine fault is repaired
Look up another code
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Sources and review
Review: no source links are recorded for this entry.
Last updated 2026-09-25.
Report a correction for C0242. Include your vehicle, the issue and a source if you have one.
This fault is part of the GM ABS and StabiliTrak family. The GM ABS and StabiliTrak codes guide covers the check order.