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Certain 2015-2017 Cadillac Escalade vehicles have been recalled due to loss of vacuum.

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Nissan P4456

This bulletin applies to all 2009 and later Nissan models. On-board diagnosis of DTC P0456 is sometimes performed when the engine is not running.

Tricky Vacuum

This bulletin applies to 2012/2013 Buick Regal vehicles with the MIL on and with DTC P0442 set as current or in history (EVAP system small leak canister vent solenoid valve not sealing under vacuum).