Toyota Highlander 2001 — technical service bulletin
Bulletin 00603 · NHTSA communication 10001998 · issued May 2, 2003
Technical service bulletin
communication type
Engine and Engine Cooling
component
2001
model years
1
vehicle entries
Official summary
Engine control module (ecm) calibration update: malfunction indicator lamp on with diagnostic trouble code p0420 or p0430. *tt *jb
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.