Fuel Pump Malfunction Troubleshooting Help

[debom3]

Hey Everyone,

Couple of nights ago I noticed that when the car started up it was idling pretty rough. Idle was bouncing maybe +/- 100 RPM's. Once it warmed up, everything seemed OK. About 1 mile down the road, getting onto the freeway I give it a little gas in 4th gear (revs were not very high) and I feel a studder. Chime sounds and the iDrive screen is flashing "Fuel Pump Malfunction" The car automatically goes into limp mode with the redline reduced.

I continue to my destination, and shut the car off. I turn it back on, and it appears that the car is OK. No CEL, or SES is on at restart.

I go to dinner, come back to the car and restart a couple hours later. Immediately I get a CEL and it says "INCREASED EMISSIONS". Going home, and getting on the freeway at about 30% throttle I get the same "Fuel Pump Malfunction" screen on iDrive.

I got an OBD2 scanner. Nothing fancy, just a cheapo from Walmart.

Codes were as follows.

P0092 - Fuel Pressure Reg 1 Control Circuit High
P0191 - Fuel Rail Pressure Sensor Circuit Range/Performance
P0193 - Fuel Rail Pressure Circuit High Input
P2288 - Injector Pressure Control too High
P3006 - Fuel Pressure Pressure Rate Controlled, Pressure Too High

As a good forum member, I have been searching for two days now. It appears that this is one of three things...

A - Low Pressure Sensor
B - EKP Module
C - Fuel Pump (maybe?)

Car is a March 08 Build, so it falls within the range of the vehicles that are known to have the EKP modules go bad commonly.

However, I found that people with P0191 claim that just replacing the Fuel Pressure Sensor fixes their issues.

My plan is to replace the Fuel Pressure Sensor tonight, clear the codes, and restart and see what happens. Im really hoping this fixes it because this is the cheapest option.

Does anyone have any insight into my issues? I would rather not waste the $$$ Replacing the sensor if someone can tell me that it is definitely the EKP module or something else...

I appreciate the help!

[debom3]

The pressure Senser seems to have fixed my isses!

[BzsBimmer]

Well that's a howdy doody! Don't even give us a chance to post wild ideas for you to throw money at lol.
I was going to say that your logic made total sense. With the absence of a good technician and more expensive diagnostic equipment, I too would have started with the lowest cost option to fix.
Great job!

[debom3]

Thanks! I was pretty worried it was going to be something major. I feel I got lucky with the easy fix.

It was kind of frustrating, just getting the car of my dreams. Week 1 need a battery replacement $300, week 2 CEL goes off.

I was sooooooo relieved that it was only the sensor, simple fix, no coding required.

[Flea7]

Thanks for the help through PM debom3.... Glad everything worked out well for you!

[regular guy]

Originally Posted by debom3

Hey Everyone,

Couple of nights ago I noticed that when the car started up it was idling pretty rough. Idle was bouncing maybe +/- 100 RPM's. Once it warmed up, everything seemed OK. About 1 mile down the road, getting onto the freeway I give it a little gas in 4th gear (revs were not very high) and I feel a studder. Chime sounds and the iDrive screen is flashing "Fuel Pump Malfunction" The car automatically goes into limp mode with the redline reduced.

I continue to my destination, and shut the car off. I turn it back on, and it appears that the car is OK. No CEL, or SES is on at restart.

I go to dinner, come back to the car and restart a couple hours later. Immediately I get a CEL and it says "INCREASED EMISSIONS". Going home, and getting on the freeway at about 30% throttle I get the same "Fuel Pump Malfunction" screen on iDrive.

I got an OBD2 scanner. Nothing fancy, just a cheapo from Walmart.

Codes were as follows.

P0092 - Fuel Pressure Reg 1 Control Circuit High
P0191 - Fuel Rail Pressure Sensor Circuit Range/Performance
P0193 - Fuel Rail Pressure Circuit High Input
P2288 - Injector Pressure Control too High
P3006 - Fuel Pressure Pressure Rate Controlled, Pressure Too High

As a good forum member, I have been searching for two days now. It appears that this is one of three things...

A - Low Pressure Sensor
B - EKP Module
C - Fuel Pump (maybe?)

Car is a March 08 Build, so it falls within the range of the vehicles that are known to have the EKP modules go bad commonly.

However, I found that people with P0191 claim that just replacing the Fuel Pressure Sensor fixes their issues.

My plan is to replace the Fuel Pressure Sensor tonight, clear the codes, and restart and see what happens. Im really hoping this fixes it because this is the cheapest option.

Does anyone have any insight into my issues? I would rather not waste the $$$ Replacing the sensor if someone can tell me that it is definitely the EKP module or something else...

I appreciate the help!

P0092 - http://wiki.rcollins.org/core/index....r:_2722,_P0092
P0191 - http://wiki.rcollins.org/core/index....r:_27CE,_P0191
P0193 - http://wiki.rcollins.org/core/index....r:_2786,_P0193
P2288 - http://wiki.rcollins.org/core/index....r:_2788,_P2288
P3006 - http://wiki.rcollins.org/core/index....r:_2787,_P3006

[Darkmoyle]

Hi Debom,

I am having the same symptoms you had. Can you share the part number/cost of the fuel pressure sensor?

Thanks for your great write up.

MD

[BPMSport]

Replace the fuel pressure sensor first. Clear faults and then troubleshoot from there if issues persist. 80% chance it will rectify these issues.

[chief]

Having replaced all three, the EKP solved the issue for me.

[BPMSport]

I have an EKP module here if the sensor doesn't do the trick. Fortunately the module is extremely easy to swap out.

[debom3]

Part No. 13537614317

If I recall correctly it was a little over $100 at the dealership with a BMWCCA discount.

Whoops, i guess you cant post links here...

Good Luck!

[slimmj0k3r]

Just to bump this thread up I'm having the same issue, replaced the sensor and did the EKP module last night. Same issues this morning driving to work. Should I test the fuel pump wiring/relay before purchasing the fuel pump?

[Weyne Masters]

New updates?

[Janusbuxbom]

Hi guys
I am having the same problem with my 08' e93 m3... But can't finde the ekp unit in the car?
Can Any of u help me??

Janus

[debom3]

Originally Posted by Janusbuxbom

Hi guys
I am having the same problem with my 08' e93 m3... But can't finde the ekp unit in the car?
Can Any of u help me??

Janus

I believe it is behind your back seat, but I have never personally taken one out.

[BPMSport]

Originally Posted by debom3

I believe it is behind your back seat, but I have never personally taken one out.

This is correct. It's right behind the passenger side rear seat next to the door panel. The plug housing is green if I recall correctly. You can't miss it, right at the top and the only module in there.

I have a replacement in stock if anyone is looking for one.

[Janusbuxbom]

Thanks what do u want for the ekp module? Do u ship to Denmark?

[FormulaMMM]

+1 for low fuel pressure sensor replacement being the likely solution on this.