New Beetle L4-1.8L Turbo (BNU) (2005)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Engine Controls - MIL ON/DTC P0420/P0300-P0304
01 08 10
March 6, 2008
2016958
Affected Models
Condition
Update Programming, MIL ON or Flashing, DTC P0420 Stored in ECM
Tip:
Diagnostic trouble codes stored may also include P0300 - P0304 upon cold start.
ECM requires update to enhance the system strategies shown above.
NOTE:
DO NOT diagnose or replace components due to misfire faults before performing the update function as explained in this bulletin.
DO NOT diagnose, repair or replace Catalyst system components before performing the update function as explained in this bulletin.
Technical Background
Improved ECM software resolves concerns related to:
-
Adjustment to OBD catalytic converter diagnostic parameter strategy.
-
Adjustment to cold start adaptation.
Production Solution
Software concern was identified after production was concluded.
Service
Update Programming Procedure:
Note:
Non-observance of the following points may lead to ECM failure! VAS 5051 or VAS 5052 must always be connected to the approved power supply
at the approved voltages. Under no circumstances should the power supply be interrupted or the diagnostic connector unplugged during the update