new member, service indicator/imobilizer problems

[adamd]

Hi new here, wondering if anyone has seen something like this before.
2003 jetta
turned the car on today and it dies after a second.
on the cluster the key light was on.
in the odometer at first it says service then changes to say mileage is 651533 miles (only really at 91k)

vag-com says i have two faults 16804 and 17978.

[Keithuk]

Welcome to the forum.

Originally Posted by adamd

vag-com says i have two faults 16804 and 17978.

VAG Error Code: 16804

Fault Location:
Catalytic converter system, bank 1 - efficiency below threshold

Possible Cause:
Catalytic converter.


VAG Error Code: 17978
EOBD II Error Code: P1570

Fault Location:
Engine control module (ECM) - immobilizer active

Possible Cause:
Incorrect/damaged key.
Incorrectly coded.
Engine control module (ECM)/Immobilizer replacement without coding.
Wiring.
Immobilizer defective.


As taken from my Free EOBD II Error Codes software