DTC P1626/18034: Powertrain DATABUS Missing Message From Transmission Control Module

NOTE: VAS 5051 scan tool and VAG 5051/1 adapter cable are necessary to diagnose this code. Follow test equipment manufacturer's instructions for scan tool operation.

NOTE: For this DTC, ECM does not illuminate Malfunction Indicator Light (MIL) unless malfunction is recognized after 2 consecutive ignition cycles.

DTC P1606/18014 suggests communication concern between ECM and other control modules which communicate over CAN-bus circuits. For diagnostic procedure for checking data transfer concerns, see DATA TRANSFER BETWEEN ENGINE CONTROL MODULE AND CAN-BUS CAPABLE CONTROL MODULES under SELF-DIAGNOSTIC SYSTEM. If problem is found, repair as necessary. After repair, use scan tool to clear DTCs and generate a ECM readiness code. See FUNCTION 05 - CLEARING DIAGNOSTIC TROUBLE CODES and READINESS CODE under SELF-DIAGNOSTIC SYSTEM. Test drive vehicle. Using scan tool, retrieve DTCs. If DTC does not reset testing is complete.