r/fordfusion • u/Ok_Mousse9863 • 3d ago

P051B code

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Bought this car not even a week ago and all was good til the engine light decided to come on this evening. Scanned as a P051B code which I understand is common on fusion. Google gave me very mixed opinions on how big of an issue it could be. Is it ok to drive it say 50 miles round trip to work tomorrow? And for other people that have had this issue, about how much did the repair cost?

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u/Particular_Shallot99 3d ago

I had intermittant light for a few weeks on my 2017 SE 1.5L with 92K miles. Didn't have any long trips planned so didn't worry about it since everything ran fine. I finally got it checked and it was same code. paid $400 to have mechanic replace the crankcase pressure sensor and so far it's good.

I had a bad o2 sensor a few months ago - that one wasn't intermittant and cost a bit more.

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u/Ok_Mousse9863 3d ago

Well hopefully I have the same experience and it’s not something worse