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long term fuel trim

This bulletin applies to 2014-2018 Buick Regal and 2017-2018 Envision vehicles. The MIL may be on with no drivability concerns, and DTC P2097 may be set. There are many things that can cause the P2097 and care must be taken when diagnosing this code.

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Mystery MIL

This bulletin applies to 2014-2018 Buick Regal and 2017-2018 Envision vehicles, equipped with a 2.5L or 2.0L engine. The MIL may be on, with no drivability issues. DTC P2097 may be stored. There are many things that can cause P2097 and care must be taken when diagnosing this code.