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December 1, 1994 Service bulletin

It has been determined that the 1990 jeep vehicle, equipped with the 2.5L engine, may be in violation of...

Jeep technical service bulletin RCL/557 for 1990 Jeep Wrangler, 1990 Jeep Cherokee and 1990 Jeep Comanche.

Bulletin number
RCL/557
Component
Engine and engine cooling: exhaust system: emission control
Summary
It has been determined that the 1990 jeep vehicle, equipped with the 2.5l engine, may be in violation of federal emissions standards. Hydrocarbon, carbon monoxide and oxides of nitrogen levels could be above allowable limits, which were established to protect the public health from the dangers of air pollution. To correct this problem, dealers will replace the oxygen sensor. Tw

Owners of these vehicles have filed 36 complaints in the engine category.

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