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Top 11 Causes of the Subaru Check Engine Light (+ Next Steps)

RepairSmith

Faulty Ignition Coil The ignition coil transforms low-voltage electricity from the battery into the high-voltage current required to set off the spark plugs. If it fails, it can cause engine misfires , rough idling, and even damage its internal parts. Certified pre-owned inventory is often repaired to recreate a “like new” condition.