Possible causes

– Repair other codes first

Tech notes

If the P1380 code is set with other codes, repair other codes first and then clear the code.

When is the code detected?

If the Electronic Brake Control Module (EBCM) detects a condition which will not allow the EBCM to properly identify rough road situations while a misfire condition is being detected by the Powertrain Control Module (PCM), DTC P1380 will set.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1380 CHEVROLET Description

The Powertrain Control Module (PCM) receives rough road information from the Electronic Brake Control Module (EBCM) on the serial data circuit. The PCM uses the rough road information in order to enhance the misfire diagnostic by distinguishing crankshaft speed variations caused by driving on rough road surfaces from the variations caused by true misfires. The EBCM transmits rough road information based on the inputs from the wheel speed sensors.