Jeep Grand Cherokee 2004 — technical service bulletin
Bulletin 1804003 · NHTSA communication 10005291 · issued Nov 1, 2003
Technical service bulletin
communication type
Electrical System
component
2004
model years
1
vehicle entries
Official summary
Erroneous diagnostic trouble code (dtc) p0135 - 1/2 oxygen sensor heater failure. *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.