S54 MAF Code

Geauxkart · 08-01-2012, 09:26 AM

Looks like no one on the Zpost forum could help me, maybe you guys can shed some light on what I need to do.... They sent me here.

07 Z4MC with 6K miles.
Recently changed to euro headers, relocated o2s and egt, all seems fine. 100 miles later the SES light comes on, and I get code P1140 - MAF sensor out of range. Only code, O2s seem happy.

When I unplug the Maf at idle, there is no change.
The cheapo scanner I have doesn't give me freeze frame data.
I have reset the light twice, but it keeps coming back.

I cleaned with MAF cleaner - no change - except that the light did come on faster...

Before I buy a fairly expensive sensor, anything else I can check?
Cant find any vacuum leaks in the intake, everything seems to run just fine.

Thanks for any help you can provide!

James

Geauxkart · 08-01-2012, 07:44 PM

Do I have herpes?
First posts on this side of the forum, and not a response on either?
It's not contagious thru the internet fellas.

elm3 · 08-02-2012, 07:06 AM

Take the MAF sensor out and clean it. They sell a MAF cleaner in a spray can. Just make sure that you don't touch the metal wire (that is the sensor) let it dry a little and install. Try that first. Do you have an oiled air filter? It usually happens if you put too much oil on your air filter. The sensor gets coated with the oil. If it doesn't fix it, you might have to get a new sensor. Hope this helps.

Eric

THE TECH · 08-02-2012, 08:22 AM

Quote:

Originally Posted by elm3

Take the MAF sensor out and clean it. They sell a MAF cleaner in a spray can. Just make sure that you don't touch the metal wire (that is the sensor) let it dry a little and install. Try that first. Do you have an oiled air filter? It usually happens if you put too much oil on your air filter. The sensor gets coated with the oil. If it doesn't fix it, you might have to get a new sensor. Hope this helps.

Eric

^A good place to start.

Geauxkart · 08-02-2012, 09:47 AM

My original post reads that I already tried the cleaner... I did some research before asking for help.
Stock intake / filter.

THE TECH · 08-02-2012, 10:00 AM

Quote:

Originally Posted by Geauxkart

My original post reads that I already tried the cleaner... I did some research before asking for help.
Stock intake / filter.

Maybe just the sensor itself at this point.

Geauxkart · 08-02-2012, 10:01 AM

I was afraid of that...
Thanks!

Z K · 08-02-2012, 10:44 AM

MAF sensor is very delicate. If you knock it or get it dirty can kill the sensor... Try replacing the sensor and try it. I'm glad the M3 doesn't have a MAF sensor.

08-01-2012, 09:26 AM	#1
Geauxkart Second Lieutenant 13 Rep 280 Posts Drives: 2007 Z4 M Coupe Sepang Join Date: Jan 2012 Location: Baton Rouge, LA iTrader: (3)	S54 MAF Code - Advice please?? Looks like no one on the Zpost forum could help me, maybe you guys can shed some light on what I need to do.... They sent me here. 07 Z4MC with 6K miles. Recently changed to euro headers, relocated o2s and egt, all seems fine. 100 miles later the SES light comes on, and I get code P1140 - MAF sensor out of range. Only code, O2s seem happy. When I unplug the Maf at idle, there is no change. The cheapo scanner I have doesn't give me freeze frame data. I have reset the light twice, but it keeps coming back. I cleaned with MAF cleaner - no change - except that the light did come on faster... Before I buy a fairly expensive sensor, anything else I can check? Cant find any vacuum leaks in the intake, everything seems to run just fine. Thanks for any help you can provide! James
	Appreciate 0 Tweet Quote

08-01-2012, 07:44 PM	#2
Geauxkart Second Lieutenant 13 Rep 280 Posts Drives: 2007 Z4 M Coupe Sepang Join Date: Jan 2012 Location: Baton Rouge, LA iTrader: (3)	Do I have herpes? First posts on this side of the forum, and not a response on either? It's not contagious thru the internet fellas.
	Appreciate 0 Quote

08-02-2012, 07:06 AM	#3
elm3 ///M Fan 366 Rep 2,159 Posts Drives: '09 E92 M3 IB/'17 f85 X5M LBB Join Date: Sep 2008 Location: Canton, GA. iTrader: (1) Garage List 2017 BMW / X5M [9.00] 2009 E92 M3 [10.00] 2004 Yamaha R1 [10.00]	Take the MAF sensor out and clean it. They sell a MAF cleaner in a spray can. Just make sure that you don't touch the metal wire (that is the sensor) let it dry a little and install. Try that first. Do you have an oiled air filter? It usually happens if you put too much oil on your air filter. The sensor gets coated with the oil. If it doesn't fix it, you might have to get a new sensor. Hope this helps. Eric __________________ '09 E92 ///M3 Interlagos Blue,6MT,Silver Novillo Leather,CF Trim,Premium Package,Technology Package,Cold Weather Package,Premium Sound,19"Wheels,Moonroof-Toy/'17 X5M, Long Beach Blue, Executive Package,Technology Package, Lighting Package, Driver Assist, Full Mughello Red Interior, 21" wheels-Toy/'14 535i with M Sport and 19" wheels-Daily
	Appreciate 0 Quote

08-02-2012, 09:47 AM	#5
Geauxkart Second Lieutenant 13 Rep 280 Posts Drives: 2007 Z4 M Coupe Sepang Join Date: Jan 2012 Location: Baton Rouge, LA iTrader: (3)	My original post reads that I already tried the cleaner... I did some research before asking for help. Stock intake / filter.
	Appreciate 0 Quote

08-02-2012, 10:01 AM	#7
Geauxkart Second Lieutenant 13 Rep 280 Posts Drives: 2007 Z4 M Coupe Sepang Join Date: Jan 2012 Location: Baton Rouge, LA iTrader: (3)	I was afraid of that... Thanks!
	Appreciate 0 Quote

08-02-2012, 10:44 AM	#8
Z K Major General 1887 Rep 5,506 Posts Drives: E90 M3, G20 M340i Join Date: Jul 2011 Location: San Francisco iTrader: (3)	MAF sensor is very delicate. If you knock it or get it dirty can kill the sensor... Try replacing the sensor and try it. I'm glad the M3 doesn't have a MAF sensor.
	Appreciate 0 Quote

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search