NHTSA Complaint #11486440 — 2014 SUBARU FORESTER

Check engine light came on at 92,355 odometer miles. Dealer diagnosis was code P0171, airflow sensor intermittent failure causing rich fuel and affecting mileage. Failure of the air fuel sensor was due to oil leakage from the camshaft carrier covers located above the exhaust manifold where the A/F sensor is located. This could have resulted in a fire. The repair necessitated engine removal to access the camshaft carrier covers and resealing the area along with replacing the A/F sensor. The cost was nearly $4k which was not covered under warranty due to the Forester is 9 years old.