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September 12, 2003 Service bulletin

Erroneous diagnostic trouble codes (DTCS) reading to 4.0L oxygen sensor heater failure

Jeep technical service bulletin 1803203 for 2004 Jeep Grand Cherokee.

Bulletin number
1803203
Component
Engine and engine cooling: exhaust system
Summary
Erroneous diagnostic trouble codes (dtcs) reading to 4.0l oxygen sensor heater failure. Tt

Owners of these vehicles have filed 90 complaints in the engine category.

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