DTC P2A04 Buick
Lost Communication With ECM PCM A on Bus B
Lost Communication With ECM PCM A on Bus B
Description
The system voltage is between 9-16 volts. The vehicle power mode master requires serial data communication to occur from this specific module.
Cause and Solution
A supervised periodic message that includes the transmitter module availability has not been received.
Video Guide
Diagnostic Info
- DTC Code: P2A04
- Brand: Buick