What does P1381 mean on a Chevy?

P1381. Misfire Detected - No Communication With Brake Control Module. Applies to Silverado, Sierra, Tahoe, Yukon, Escalade.

What causes P1381 on a Chevy?

Open Class 2 serial data line to the brake control module Failed EBCM pulling down module communications Blown EBCM power or ground fuse Corroded data-link connector pins PCM replaced without completing module setup

How do I fix P1381 on a Chevy?

Attempt EBCM communication with a Tech2 or GDS2 to confirm the loss Check EBCM powers, grounds, and fuses before replacing anything Inspect the serial data wiring for opens or shorts Resolve any U-code communication faults first Restore communication, then clear and verify misfire monitoring resumes

Code

P1381

Misfire Detected - No Communication With Brake Control Module

Category: Powertrain - Ignition
Severity: Check Engine Light
Applies to: Silverado, Sierra, Tahoe, Yukon, Escalade
Related: P0300 Random/Multiple Cylinder Misfire Detected on OBD Codes List

What it means

P1381. Misfire Detected - No Communication With Brake Control Module. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Yukon, Escalade.

Findings, check these first

Open Class 2 serial data line to the brake control module
Failed EBCM pulling down module communications
Blown EBCM power or ground fuse
Corroded data-link connector pins
PCM replaced without completing module setup

Standard procedure

Attempt EBCM communication with a Tech2 or GDS2 to confirm the loss
Check EBCM powers, grounds, and fuses before replacing anything
Inspect the serial data wiring for opens or shorts
Resolve any U-code communication faults first
Restore communication, then clear and verify misfire monitoring resumes

Look up another code

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Sources and review

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Last updated 2026-09-13.

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