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Ignition coil failure on 2009 Toyota Corolla

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It's a rainy day and my engine light came on. I got code p90352 ignition coil b primary/secondary circuit malfunction. Vehicle runs fine. Is it safe to drive? Is it difficult to replace whatever part I need? Any help would be awesome! Thank You. God Bless America!
(1) Answer
Should not be a problem driving it as long as the engine is running ok. However you should have a mechanic do a scan test to check ignition system, code reader can't do this. Coil on plug is not hard to change, problem is which of the four is at falt?
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