What does code P1629 mean?

Q: What does code P1629 mean?

Data Bus Powertrain Missing Message From Distance Control. P1629 on Volkswagen vehicles means the engine control module (ECM) has lost the controller area network (CAN) message from the distance control module, which is the radar or camera unit used by adaptive cruise control. The ECM expects a regular status broadcast from that module over the powertrain data bus, and when the message stops arriving or fails its checksum, the ECM logs this code and typically disables the affected driver-assistance features.

DTC codes / Volkswagen codes / P1629

P1629 · VolkswagenData Bus Powertrain Missing Message From Distance Control

P1629 on Volkswagen vehicles means the engine control module (ECM) has lost the controller area network (CAN) message from the distance control module, which is the radar or camera unit used by adaptive cruise control. The ECM expects a regular status broadcast from that module over the powertrain data bus, and when the message stops arriving or fails its checksum, the ECM logs this code and typically disables the affected driver-assistance features.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyProfessional

AreaComputer and output circuits

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