Jetta GLS Wagon L4-1.8L Turbo (AWP) (2002)
PROM - Programmable Read Only Memory: Customer Interest
Engine Controls - DTC's P0300-P0304/P0420/P0441
0109-10
Affected Vehicles
Condition
01 09 10 Apr. 15, 2009 2010348 Supersedes T. B. Group 01, number 09-06 dated Apr. 8, 2009 due to additional "Note" under Technical Background
information.
Update Programming Engine Control Module to Address DTCs P0300-P0304, P0420 and P0441
NOTE: DO NOT diagnose or replace Evaporative or Emissions system components such as Catalyst, Ignition Components, Fuel Cap, Activated
Charcoal Canister or the Evaporative system purge valve -N80-, before performing the update function as explained in this bulletin.
Updated ECM software that addresses:
Technical Background
May be caused by software of Engine Control Module.
Improved software in Engine Control Module resolves concerns related to:
-
EVAP strategy change to prevent system testing below 5 degrees Celsius (40 degrees Fahrenheit).
-
Adjustment to OBD diagnostic parameter strategy.
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For catalyst efficiency faults also see Technical Bulletin instance number 2010271.
NOTE: Monitoring strategy for catalytic converter is too sensitive causing unnecessary catalytic converter replacements. Engine misfire diagnostic
strategy is adjusted for better catalyst protection. Updated programming of the ECM software is based on recent engineering experiences and makes
this knowledge available for the monitoring strategy.
Production Solution
Software concern was identified after end of production.
Service
PROCEDURE:
Engine Control Module Update - Programming (Flashing) using Software Version Management (SVM)
Vehicle requirements