Volkswagen Golf 1999–2002 — technical service bulletin
Bulletin Campaign Circula · NHTSA communication 10155823 · issued Sep 18, 2013
Technical service bulletin
communication type
Engine and Engine Cooling
component
1999–2002
model years
12
vehicle entries
Official summary
Emissions Service Action Circular (VR6 Engine Update ECM Software for Catalytic Converter Monitoring System): The ECM software for the catalytic converter monitoring system is too sensitive. This can cause the MIL to come on, and some vehicles may exceed Federal and/or California emissions standards. Also, in some cases this leads to unnecessary catalytic converter replacement. The corrective action taken for this issue was to Update ECM software.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.