E90 N55 misfire

veshant · 11-19-2019, 11:49 AM

Hi,
I'm having trouble identifying what's causing my misfires on cyl 1,2,4. Just changed plugs, and tried swapping coils on 1&3 and it doesn't follow. Tried disconnecting both the oxygen sensors and got the same codes with the addition of the oxygen sensors codes.

Codes I'm getting:
P0193 - FRP sensor high input
P0300 - Multiple cylinder misfires
P0301/2/4 - cylinder 1/2/4 misfire

Also got this but it cleared:
P0172 - System too rich, bank 1

Any help is appreciated, thanks!

unrulyteach · 11-19-2019, 11:03 PM

Quote:

Originally Posted by veshant

Hi,
I'm having trouble identifying what's causing my misfires on cyl 1,2,4. Just changed plugs, and tried swapping coils on 1&3 and it doesn't follow. Tried disconnecting both the oxygen sensors and got the same codes with the addition of the oxygen sensors codes.

Codes I'm getting:
P0193 - FRP sensor high input
P0300 - Multiple cylinder misfires
P0301/2/4 - cylinder 1/2/4 misfire

Also got this but it cleared:
P0172 - System too rich, bank 1

Any help is appreciated, thanks!

Check fuel injectors?

11-19-2019, 11:49 AM	#1
veshant Registered 0 Rep 4 Posts Drives: 2011 BMW 335i Join Date: Nov 2019 Location: California iTrader: (0)	E90 N55 misfire Hi, I'm having trouble identifying what's causing my misfires on cyl 1,2,4. Just changed plugs, and tried swapping coils on 1&3 and it doesn't follow. Tried disconnecting both the oxygen sensors and got the same codes with the addition of the oxygen sensors codes. Codes I'm getting: P0193 - FRP sensor high input P0300 - Multiple cylinder misfires P0301/2/4 - cylinder 1/2/4 misfire Also got this but it cleared: P0172 - System too rich, bank 1 Any help is appreciated, thanks!
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