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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 09-11-2011
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I am: Rob Jones
Join Date: Jun 2011
Location: Toronto, ON
Vehicle: 2011 Ford Ranger
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P0303 code

Hey guys,

I have a 2011 Ranger 4x2 with the 4L engine. Today I got a check engine light with a P0303 code. A search on the net shows that to be a cylinder 3 misfire. Truck is under warranty so I will take it to the dealer.

Would a K&N cold air intake (the whole kit) and a Gibson dual exhaust be connected in any way to my check engine light?


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Old 09-11-2011
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I am: DJ Fillman
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i dont see how it would be related at all
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Old 09-11-2011
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Location: Indiana/Mississippi
Vehicle: '99 Ford Ranger Flareside
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Just to play it safe, I would put your stock filter back in when you go to the dealer. It might not matter but I would just play it safe so they have nothing to complain about.
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