P1884, and P0103 - Land Rovers Only

White and Nerdy · 02-18-2007, 06:46 PM

Hello everybody, 1999 Range Rover 4.6 HSE, about a month or so ago I replaced my MAS, I took it to the local guy to have the computer reset. My mileage started to gain and everything was fine. I just returned from a 400 mile round trip on interstate......while almost home, I pulled out an floored it to pass a car. The check engine light came on. these are the codes. I had the happen one time before and cleared them myself with a scanner. The same thing caused it also, flooring the vehicle. Anyone have any ideas? the mileage is not what it used to be it is a little lower 16.9 on hwy versed almost 19 before the MAS. Around town it is 12 or 13, when it used to be 14. the downshift doesn't seem like it really gives it the git up and go it used to either. I have checked for loose connections, vacuum leaks, and pretty much am at a loss now. Any help or ideas will be appreciated. BTW running around 102000 miles. Terry

Muddy Oval · 02-18-2007, 08:56 PM

It can mean several things- TPS could have been the cause, as could a few other things. Seems you had a misfire on one cyl too. It could mean an invalid datum from one of several sensors- it's just not that specific.
I'd start by looking at the TPS through an OBD scan tool and watch the value from 1 to 100% throttle. I could see the TPS having a glitch at wide open that you'd only ever see when standing on it- Start with the easy checks and work 'up' from there.

White and Nerdy · 02-19-2007, 05:20 AM

Thanks Muddy Oval.my scan tool will do live data........I will check that. I wondered if that might be part of the problem. I am curious how you knew about the misfire? I didn't really have anything for sure on the 1884 code.

Elemental · 02-19-2007, 08:37 AM

http://www.discoweb.org/forums/showt...highlight=1884

White and Nerdy · 02-19-2007, 06:49 PM

OK ran more test on the vehicle today....I just upgraded my scanner and I actually don't know what most of it means now......hopfully so of you can fill in the blanks for me.
TPS 0% at idle to 72% WOT
what range would the O2 sensors be in?
speedometer off a few miles
very slight advance and idle change 1 degree and 25rmp at idle
it will give me lbs of air
intake air temp around 73 (it was about 45 today outside temp)
also now that I think abou it I did repalce the plugs right after replacing the MAS but before having the local guy reset the adaptave setting or what ever had to be done after the MAS repalcement. The milage REALLY sucked before he reset it.

Elemental · 02-20-2007, 05:02 AM

http://www.discoweb.org/forums/showt...ighlight=p1884

Seriously, Click on one of the links I provided.

White and Nerdy · 02-21-2007, 01:12 PM

I did check out the links. thank you.........I bought the whole unit......but I did buy it from Atlantic British. I have cleared the codes and driven it two days now, with no codes? It just doesn't feel right. I though about putting the old MAS back on but I really don't want to keep giving the local guy $65.00 to hook it up to his computer to reset everything. just lost and confused....

Elemental · 02-21-2007, 02:07 PM

If you see the second thread. There is a Updated BCM program to adress your very concern.

White and Nerdy · 02-23-2007, 02:38 PM

I must have missed that......I saw that others were having similar problems but I failed to see the solution. I will look again.......Thanks again

02-18-2007, 06:46 PM	#1 (permalink)
White and Nerdy Member Join Date: Oct 2006 Location: Hickory, NC Posts: 26 Gallery: 0	P1884, and P0103 Hello everybody, 1999 Range Rover 4.6 HSE, about a month or so ago I replaced my MAS, I took it to the local guy to have the computer reset. My mileage started to gain and everything was fine. I just returned from a 400 mile round trip on interstate......while almost home, I pulled out an floored it to pass a car. The check engine light came on. these are the codes. I had the happen one time before and cleared them myself with a scanner. The same thing caused it also, flooring the vehicle. Anyone have any ideas? the mileage is not what it used to be it is a little lower 16.9 on hwy versed almost 19 before the MAS. Around town it is 12 or 13, when it used to be 14. the downshift doesn't seem like it really gives it the git up and go it used to either. I have checked for loose connections, vacuum leaks, and pretty much am at a loss now. Any help or ideas will be appreciated. BTW running around 102000 miles. Terry

02-18-2007, 08:56 PM	#2 (permalink)
Muddy Oval Otherwise known as STEVE Join Date: Oct 2005 Location: Vermont Posts: 1,968 Gallery: 0	It can mean several things- TPS could have been the cause, as could a few other things. Seems you had a misfire on one cyl too. It could mean an invalid datum from one of several sensors- it's just not that specific. I'd start by looking at the TPS through an OBD scan tool and watch the value from 1 to 100% throttle. I could see the TPS having a glitch at wide open that you'd only ever see when standing on it- Start with the easy checks and work 'up' from there. __________________ 2002 Freelander 2000 DII w/CDL 1967 SIIA 109SW Former Rovers 2004 Modded "S" Disco, R.I.P. 2004 G4 Disco 2002 Modded Freelander 1995 Modded Disco 1994 D-90 #8 1993 NAS D110 1990 Range Rover County 1973 SIII 88 1972 Range Rover 2 door

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02-19-2007, 05:20 AM	#3 (permalink)
White and Nerdy Member Join Date: Oct 2006 Location: Hickory, NC Posts: 26 Gallery: 0	Thanks Muddy Oval.my scan tool will do live data........I will check that. I wondered if that might be part of the problem. I am curious how you knew about the misfire? I didn't really have anything for sure on the 1884 code.

02-19-2007, 08:37 AM	#4 (permalink)
Elemental Senior Member Join Date: Feb 2007 Posts: 3,076 Gallery: 0	http://www.discoweb.org/forums/showt...highlight=1884

02-19-2007, 06:49 PM	#5 (permalink)
White and Nerdy Member Join Date: Oct 2006 Location: Hickory, NC Posts: 26 Gallery: 0	OK ran more test on the vehicle today....I just upgraded my scanner and I actually don't know what most of it means now......hopfully so of you can fill in the blanks for me. TPS 0% at idle to 72% WOT what range would the O2 sensors be in? speedometer off a few miles very slight advance and idle change 1 degree and 25rmp at idle it will give me lbs of air intake air temp around 73 (it was about 45 today outside temp) also now that I think abou it I did repalce the plugs right after replacing the MAS but before having the local guy reset the adaptave setting or what ever had to be done after the MAS repalcement. The milage REALLY sucked before he reset it.

02-20-2007, 05:02 AM	#6 (permalink)
Elemental Senior Member Join Date: Feb 2007 Posts: 3,076 Gallery: 0	http://www.discoweb.org/forums/showt...ighlight=p1884 Seriously, Click on one of the links I provided.

02-21-2007, 01:12 PM	#7 (permalink)
White and Nerdy Member Join Date: Oct 2006 Location: Hickory, NC Posts: 26 Gallery: 0	I did check out the links. thank you.........I bought the whole unit......but I did buy it from Atlantic British. I have cleared the codes and driven it two days now, with no codes? It just doesn't feel right. I though about putting the old MAS back on but I really don't want to keep giving the local guy $65.00 to hook it up to his computer to reset everything. just lost and confused....

02-21-2007, 02:07 PM	#8 (permalink)
Elemental Senior Member Join Date: Feb 2007 Posts: 3,076 Gallery: 0	If you see the second thread. There is a Updated BCM program to adress your very concern.

02-23-2007, 02:38 PM	#9 (permalink)
White and Nerdy Member Join Date: Oct 2006 Location: Hickory, NC Posts: 26 Gallery: 0	I must have missed that......I saw that others were having similar problems but I failed to see the solution. I will look again.......Thanks again

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