P1380
Misfire Detected - Rough Road Data Not Available
What it means
P1380. Misfire Detected - Rough Road Data Not Available. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Yukon, Suburban.
Findings, check these first
- Failed wheel-speed input to the PCM from the EBCM
- Corroded EBCM communication connector
- Dead rough-road or ABS wheel-speed sensor
- PCM and EBCM software mismatch after module swap
- Damaged Class 2 serial data line between modules
Standard procedure
- Scan both the PCM and EBCM with a Tech2 or GDS2 for companion codes
- Verify wheel-speed data reaches the PCM on a test drive
- Inspect EBCM connectors and grounds for corrosion
- Diagnose any ABS wheel-speed codes first since misfire logic depends on them
- Repair the data or sensor fault first, then clear and confirm P1380 does not return
Look up another code
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Sources and review
Review: no source links are recorded for this entry.
Last updated 2026-09-13.
Report a correction for P1380. Include your vehicle, the issue and a source if you have one.