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Are there conditions that cause a false po442 in a Buick's diagnostic test codes?

Anonymous

∙ 16y ago

Updated: 10/25/2022

PO442 is a Service Engine Error code can be caused by one of the following:

1. Defective or loose fuel cap

2. EVAP canister or hose cracked- not connected

3. Purge or vent solenoid defective

4. Vaccum leak at engine

Wiki User

∙ 16y ago

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