M4 check engine light help

AwwstinM4 · 09-17-2017, 07:21 PM

Running jb4 map 1 on 93 octane with bms Intake and charge pipes. Everything else is stock. Fuel tank at half. I've had the mods on for 3 weeks with no issues. Today I was driving pretty aggressive and got a CEL.

P0171 p0174 system lean

Anyone else have this issue? I didn't get any hiccups or fluttering rpms at the time the light came on or after

UPDATE********

I️ removed the bms intake and returned it to stock. Updated the firmware on the jb4 and no issues so far.

alexc93 · 09-17-2017, 07:35 PM

Did you try resetting CEL, switching back to Map 0 and seeing if the CEL came back after driving again?

edit: are you running latest firmware?

AwwstinM4 · 09-17-2017, 07:44 PM

Quote:

Originally Posted by alexc93

Did you try resetting CEL, switching back to Map 0 and seeing if the CEL came back after driving again?

edit: are you running latest firmware?

Yes cleared code. On map 0. Drives fine. I bought the jb4 used so I'm not sure about what firmware it has or how to update it.

alexc93 · 09-17-2017, 07:46 PM

Quote:

Originally Posted by AwwstinM4

Yes cleared code. On map 0. Drives fine. I bought the jb4 used so I'm not sure about what firmware it has or how to update it.

Any codes coming up while on Map 0?

If not, then try updating JB4 firmware to latest firmware and should hopefully clear up your issues

azn_fcuk · 09-17-2017, 08:53 PM

Do you have downpipes? seems like a tuner code, those codes are typical if you have DP's.
Did it come back on after you restarted your car?

FSociety · 09-17-2017, 08:54 PM

First rule of thumb, is to check which version your jb4 is on and update to latest.
Read the codes with your JB4 plugged in, hope you have bluetooth kit

System too lean doesn't look like Downpipe or Tuner Code

azn_fcuk · 09-17-2017, 08:57 PM

Quote:

Originally Posted by FSociety

First rule of thumb, is to check which version your jb4 is on and update to latest.
Read the codes with your JB4 plugged in, hope you have bluetooth kit

System too lean doesn't look like Downpipe or Tuner Code

I had it this code once before after I installed my chargepipes after all the other mods, was told it was from the car still adapting to the extra volume of air now being metered....hasnt come back since.

AwwstinM4 · 09-17-2017, 10:58 PM

Quote:

Originally Posted by alexc93

Quote:

Originally Posted by AwwstinM4

Yes cleared code. On map 0. Drives fine. I bought the jb4 used so I'm not sure about what firmware it has or how to update it.

Any codes coming up while on Map 0?

If not, then try updating JB4 firmware to latest firmware and should hopefully clear up your issues

Thanks I'll have to do some research I'm not very good when it comes to electronics

AwwstinM4 · 09-17-2017, 10:59 PM

Quote:

Originally Posted by azn_fcuk

Do you have downpipes? seems like a tuner code, those codes are typical if you have DP's.
Did it come back on after you restarted your car?

Stock downpipes. It hasn't come back on since restarting and driving on map 0. But I haven't tried driving aggressively again.

AwwstinM4 · 09-17-2017, 11:00 PM

Quote:

Originally Posted by FSociety

First rule of thumb, is to check which version your jb4 is on and update to latest.
Read the codes with your JB4 plugged in, hope you have bluetooth kit

System too lean doesn't look like Downpipe or Tuner Code

Thanks for the info. Like I said I'm not good with updates or electronics. I may have to do some research.

AwwstinM4 · 09-17-2017, 11:01 PM

Quote:

Originally Posted by azn_fcuk

Quote:

Originally Posted by FSociety

First rule of thumb, is to check which version your jb4 is on and update to latest.
Read the codes with your JB4 plugged in, hope you have bluetooth kit

System too lean doesn't look like Downpipe or Tuner Code

I had it this code once before after I installed my chargepipes after all the other mods, was told it was from the car still adapting to the extra volume of air now being metered....hasnt come back since.

It would make sense but I've been driving the car for 3 weeks with the mods and several times pretty aggressive and no code.

Lee808 · 09-18-2017, 06:52 PM

Just a guess, but a loose intake would cause this issue too. (You mentioned that you had BMS) It's happened to me twice in the past (not on the M4). The first time was due to the silicone hose connecting the intake and the throttle body coming loose. The second time was due that same hose aging and cracking. Both times caused the car to intake more air than what the MAF sensor was metering. I was getting AFR lean codes. Both times I tightened/replaced the hose connected to the throttle body at the intake. Then I drove it for a bit to let the mixtures even up and the problem went away. Again just a guess being that you mentioned the intakes

AwwstinM4 · 09-18-2017, 07:55 PM

Quote:

Originally Posted by Lee808

Just a guess, but a loose intake would cause this issue too. (You mentioned that you had BMS) It's happened to me twice in the past (not on the M4). The first time was due to the silicone hose connecting the intake and the throttle body coming loose. The second time was due that same hose aging and cracking. Both times caused the car to intake more air than what the MAF sensor was metering. I was getting AFR lean codes. Both times I tightened/replaced the hose connected to the throttle body at the intake. Then I drove it for a bit to let the mixtures even up and the problem went away. Again just a guess being that you mentioned the intakes

Yes I've read that this issue has been Intake related. I removed the Intake today and I'll be updating the jb4 firmware this week after I receive the Bluetooth module. I'll go from there. Thanks for the help

azn_fcuk · 09-19-2017, 06:05 PM

Quote:

Originally Posted by AwwstinM4

Yes I've read that this issue has been Intake related. I removed the Intake today and I'll be updating the jb4 firmware this week after I receive the Bluetooth module. I'll go from there. Thanks for the help

you can update also if you have the laptop cable for the JB4 through the PC.

VinceV-M3 · 02-11-2019, 12:59 PM

Hi, new here,
question - What software, cables would I need to buy to check ECL and erase, adapt? and where would I buy them?
Thanks!

F80_javi · 02-11-2019, 07:07 PM

Quote:

Originally Posted by VinceV-M3

Hi, new here,
question - What software, cables would I need to buy to check ECL and erase, adapt? and where would I buy them?
Thanks!

It deletes with bootmod3. It's a very common code with the bms intakes actually. I've contacted them directly and they told me just to ignore it.

SOLIDM4 · 08-05-2019, 05:36 PM

Quote:

Originally Posted by F80_javi

It deletes with bootmod3. It's a very common code with the bms intakes actually. I've contacted them directly and they told me just to ignore it.

Good to know, I've been researching and that code keeps coming on. the car runs fine and normal. but I hate the CEL

SOLIDM4 · 08-05-2019, 05:38 PM

Quote:

Originally Posted by F80_javi

It deletes with bootmod3. It's a very common code with the bms intakes actually. I've contacted them directly and they told me just to ignore it.

I normally get the TO MUCH AIR from the MAP sensors

09-17-2017, 07:21 PM	#1
AwwstinM4 Enlisted Member 1 Rep 41 Posts Drives: 2016 m4 Join Date: Aug 2017 Location: Westchester county, NY iTrader: (0)	Running jb4 map 1 on 93 octane with bms Intake and charge pipes. Everything else is stock. Fuel tank at half. I've had the mods on for 3 weeks with no issues. Today I was driving pretty aggressive and got a CEL. P0171 p0174 system lean Anyone else have this issue? I didn't get any hiccups or fluttering rpms at the time the light came on or after UPDATE******** I️ removed the bms intake and returned it to stock. Updated the firmware on the jb4 and no issues so far. Attached Images
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09-17-2017, 07:35 PM	#2
alexc93 Colonel 381 Rep 2,384 Posts Drives: na Join Date: Nov 2009 Location: na iTrader: (8)	Did you try resetting CEL, switching back to Map 0 and seeing if the CEL came back after driving again? edit: are you running latest firmware?
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09-17-2017, 08:53 PM	#5
azn_fcuk Lieutenant 177 Rep 482 Posts Drives: M4, X6MC, AMG GT Pro Join Date: Sep 2014 Location: Canada iTrader: (0)	Do you have downpipes? seems like a tuner code, those codes are typical if you have DP's. Did it come back on after you restarted your car?
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09-17-2017, 08:54 PM	#6
FSociety IG @bmwF9xG80 3813 Rep 7,593 Posts Drives: G80 M3, X4M, G07 X7m50 Join Date: Apr 2012 Location: NYC to NJ to Orlando FL iTrader: (3) Garage List 2023 BMW G80 M3 [0.00] 2020 BMW X4MC [0.00] 16' BMW X4 M40i [10.00] 06 Cadillac STS [0.00]	First rule of thumb, is to check which version your jb4 is on and update to latest. Read the codes with your JB4 plugged in, hope you have bluetooth kit System too lean doesn't look like Downpipe or Tuner Code __________________ 60-130mph 6.5s X4M #HCP 60-130mph 5.0s G80 M3 #OrlandoAutowerks Sauce IG: @bmwF9XG80
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09-18-2017, 06:52 PM	#12
Lee808 Out in the middle of the sea 231 Rep 471 Posts Drives: 2015 M4 Join Date: Jun 2016 Location: Ewa Beach, Hawaii iTrader: (0)	Just a guess, but a loose intake would cause this issue too. (You mentioned that you had BMS) It's happened to me twice in the past (not on the M4). The first time was due to the silicone hose connecting the intake and the throttle body coming loose. The second time was due that same hose aging and cracking. Both times caused the car to intake more air than what the MAF sensor was metering. I was getting AFR lean codes. Both times I tightened/replaced the hose connected to the throttle body at the intake. Then I drove it for a bit to let the mixtures even up and the problem went away. Again just a guess being that you mentioned the intakes
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02-11-2019, 12:59 PM	#15
VinceV-M3 Registered 0 Rep 4 Posts Drives: 2015 M3 Join Date: Feb 2019 Location: CA iTrader: (0)	Hi, new here, question - What software, cables would I need to buy to check ECL and erase, adapt? and where would I buy them? Thanks!
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