Jeep Grand Cherokee 2005 — technical service bulletin
Bulletin 7803405 · NHTSA communication 10016583 · issued Aug 18, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2005
model years
1
vehicle entries
Official summary
Malfunction indicator lamp (mil) illumination due to diagnostic trouble codes (dtcs) p0420 or p0430. *tt
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.