Double check my analysis

DBordello · 07-16-2015, 06:37 PM

My poor '09 E92 M3 triggered an "Increased Emissions" warning about a month ago. Since then, it has had some pretty rough starts when parked outside. Since I had the same warning about a year ago, I thought it was another bad O2 sensor and didn't do much about it. Today, I finally got around to pulling the ODB2 codes:

P0172 - Fuel System Too Rich (Bank 1)
P0175 - Fuel System Too Rich (Bank 2)
P0191 - Fuel Rail Pressure Sensor Circuit Range/Performance
P0192 - Fuel Rail Pressure Sensor Circuit Low Input
P0301 - Misfire Cylinder 1
P0302 - Misfire Cylinder 2
P0303 - Misfire Cylinder 3
P0304 - Misfire Cylinder 4
P0305 - Misfire Cylinder 5
P0306 - Misfire Cylinder 6
P0307 - Misfire Cylinder 7
P0308 - Misfire Cylinder 8

Some quick googling reviews this is likely the Low Fuel Rail Pressure Sensor. Therefore, my plan is to replace it with part 13-53-7-614-317. Since I am going to the dealer on Saturday for an oil change, I figure I would pick it up then.

Does this seem like the proper diagnosis?
My car repair experience consists of replacing 1 O2 sensor, and this was on the edge of my ability. How hard is it to replace this sensor? It appears it twists right out, but that I might have to remove the airbox. DIY'able?

M3an V8 · 07-16-2015, 10:58 PM

I replaced my low pressure fuel sensor a few months ago, super easy. There is a DIY about it, make sure you use a 9/16 open end wrench to stabilized the rail as you unscrew the sensor. If you replaced an O2 sensor then you have plenty of skills to tackle this.

Not sure about the missfire codes though, didnt get any when my sensor went out.

DBordello · 07-17-2015, 04:11 PM

Quote:

Originally Posted by M3an V8

I replaced my low pressure fuel sensor a few months ago, super easy. There is a DIY about it, make sure you use a 9/16 open end wrench to stabilized the rail as you unscrew the sensor. If you replaced an O2 sensor then you have plenty of skills to tackle this.

Not sure about the missfire codes though, didnt get any when my sensor went out.

Would you mind linking to the DIY? The one I found is detailed, but replaces a different sensor than I thought.

M3an V8 · 07-17-2015, 07:18 PM

Quote:

Originally Posted by DBordello

Quote:

Originally Posted by M3an V8

I replaced my low pressure fuel sensor a few months ago, super easy. There is a DIY about it, make sure you use a 9/16 open end wrench to stabilized the rail as you unscrew the sensor. If you replaced an O2 sensor then you have plenty of skills to tackle this.

Not sure about the missfire codes though, didnt get any when my sensor went out.

Would you mind linking to the DIY? The one I found is detailed, but replaces a different sensor than I thought.

I used this DIY

http://www.m3post.com/forums/showthread.php?t=694148

cb1 · 11-26-2021, 04:58 PM

Hey guys,

Need suggestions. Mine failed and got P0192 and misfires at cyls 1-7. Replaced the sensor with the newer version (silver).

The car is cranking but will not start.

Battery is fully charged.
Gas is a little over a quarter.
Fuel pump primes.
Fuel pump fuse is good.

Any other thing I can check?

Thanks.

07-16-2015, 06:37 PM	#1
DBordello Private 5 Rep 52 Posts Drives: 2009 BMW M3 Join Date: Jun 2009 Location: Chicago, IL iTrader: (0)	Double check my analysis - Faulty fuel rail low pressure sensor My poor '09 E92 M3 triggered an "Increased Emissions" warning about a month ago. Since then, it has had some pretty rough starts when parked outside. Since I had the same warning about a year ago, I thought it was another bad O2 sensor and didn't do much about it. Today, I finally got around to pulling the ODB2 codes: P0172 - Fuel System Too Rich (Bank 1) P0175 - Fuel System Too Rich (Bank 2) P0191 - Fuel Rail Pressure Sensor Circuit Range/Performance P0192 - Fuel Rail Pressure Sensor Circuit Low Input P0301 - Misfire Cylinder 1 P0302 - Misfire Cylinder 2 P0303 - Misfire Cylinder 3 P0304 - Misfire Cylinder 4 P0305 - Misfire Cylinder 5 P0306 - Misfire Cylinder 6 P0307 - Misfire Cylinder 7 P0308 - Misfire Cylinder 8 Some quick googling reviews this is likely the Low Fuel Rail Pressure Sensor. Therefore, my plan is to replace it with part 13-53-7-614-317. Since I am going to the dealer on Saturday for an oil change, I figure I would pick it up then. Does this seem like the proper diagnosis? My car repair experience consists of replacing 1 O2 sensor, and this was on the edge of my ability. How hard is it to replace this sensor? It appears it twists right out, but that I might have to remove the airbox. DIY'able?
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07-16-2015, 10:58 PM	#2
M3an V8 Private 26 Rep 84 Posts Drives: E90 M3 Alpine Weiss Join Date: Oct 2013 Location: OC iTrader: (0)	I replaced my low pressure fuel sensor a few months ago, super easy. There is a DIY about it, make sure you use a 9/16 open end wrench to stabilized the rail as you unscrew the sensor. If you replaced an O2 sensor then you have plenty of skills to tackle this. Not sure about the missfire codes though, didnt get any when my sensor went out.
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11-26-2021, 04:58 PM	#5
cb1 Lieutenant 59 Rep 425 Posts Drives: F82 LCI zcomp, e92 M3, e46 M3 Join Date: Jun 2011 Location: 91789 iTrader: (7)	Hey guys, Need suggestions. Mine failed and got P0192 and misfires at cyls 1-7. Replaced the sensor with the newer version (silver). The car is cranking but will not start. Battery is fully charged. Gas is a little over a quarter. Fuel pump primes. Fuel pump fuse is good. Any other thing I can check? Thanks.
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