What does code P1608 mean?

Q: What does code P1608 mean?

Serial Communication Problem With Device 8. P1608 on a GM vehicle means the powertrain control module (PCM) has lost serial data communication with a specific device on the controller area network (CAN) or serial data bus, identified as device 8. The PCM sets this code when it expects regular status messages from that module and they stop arriving within the allowed time window.

DTC codes / GM codes / P1608

P1608 · GMSerial Communication Problem With Device 8

P1608 on a GM vehicle means the powertrain control module (PCM) has lost serial data communication with a specific device on the controller area network (CAN) or serial data bus, identified as device 8. The PCM sets this code when it expects regular status messages from that module and they stop arriving within the allowed time window.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyProfessional

AreaComputer and output circuits

Guidance is general and written for GM vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.