Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P1381: Misfire Detected - No Communication With Brake Control Module: Description
Powertrain Control Module (PCM) receives rough road information from Electronic Brake Control Module (EBCM) on serial data circuit. PCM uses rough road information to enhance misfire diagnostic by distinguishing crankshaft speed variations caused by driving on rough road surfaces from variations caused by true misfires. EBCM transmits rough road information based on inputs from wheel speed sensors. DTC sets when a loss of communication occurs which causes PCM not to receive rough road information while DTC P0300 is requesting MIL.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.