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Check Engine Light Due to PCV Grommet Vacuum Leaks on Lincoln Aviator

Problem overview

A vacuum leak from the PCV grommet vacuum leak can cause the Check Engine Light to illuminate. The molded rubber hose connections may crack and collapse, causing the vehicle to run roughly. A damaged PCV hose will require replacement.

45 people reported this problem

22 comments

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Lincoln Aviator vehicles with this problem

4 model years affected

Average mileage: 107,368 miles

(23,000 - 193,993)

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Submitted by Vehicle Owner · Feb 13, 2026

Published by RepairPal

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Check Engine Light Due to PCV Grommet Vacuum Leaks on Lincoln Aviator

Problem overview

Lincoln Aviator vehicles with this problem

Repairs related to this problem

PCV Valve Replacement

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Ask our experts about your Lincoln.