Fault codes logged

287D - Vanos Inlet actuator movement

2870 - Vanos Inlet adaption stop

Have fitted new inlet Vanos unit and solenoid valve, double checked timing.
Have swapped inlet and exhaust solenoid valves and cam sensors, no change.
At idle inlet set value is 60° but actual is 64 to 65°, at fast idle the 2 values match ok.
Exhaust values are spot on.
Drives ok for about 1/4 mile then 287D is logged and valve timing defaults to 120°, slightly more driving and 2870 is logged.

Before changing solenoid and Vanos, oil flushed, new oil and filter changed, gauzes on solenoids all clean.

Could this be a faulty Vanos unit or early sign of timing chain stretch?


Any suggestions welcome.

Thanks, Martin.