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Quote:
Originally Posted by adamd
vag-com says i have two faults 16804 and 17978.
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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 