What does code P1699 mean?

P1699 · GMNo CCD J1850 Messages Received From The Climate Control Module CCM

P1699 means the powertrain control module (PCM) has not received any valid J1850 serial data messages from the climate control module (CCM) over the Chrysler Collision Detection (CCD) bus for a set period. The PCM expects regular status broadcasts from the CCM, and when those messages stop arriving, it flags a communication loss rather than a fault in the climate system itself.

SystemPowertrain

Code typeGM specific

SeverityLow

Fix difficultyIntermediate

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.