DTC P1380: Misfire Detected - Rough Road Data Not Available: Description

The PCM receives rough road information from the Electronic Brake Control Module (EBCM) on the serial data circuit. 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. If EBCM detects a condition which will not allow EBCM to properly identify rough road situations while a misfire condition is being detected by PCM, DTC will set.