Error Code 48/ Symptoms of a dying alternator - Land Rovers Only

Sign Guy · 09-20-2007, 04:56 PM

So, just got the truck back from the shop(edit) after giving up on getting running right once the new head gaskets were on. They think that the problem is low compression but I think that must have something to do with it sitting so long. They told me that the compression of the right bank was 60-65 lbs which I find hard to believe considering I was getting 18-20 mpg at highway speeds. They didn't check the other bank. They replaced the plug wires and IAC unit but it seems to me to be running the same as when I took it in. Which is basically fine under throttle and very rough (missing and surging) at partial throttle only to die when you come to a stop. It really seems to me something electrical. On the way home from the shop the check engine light came on. It is "#48 Battery supply voltage - low". So my question is if my alternator was in the process of dying would this cause the other issues? Before I replaced the head gaskets I started having the same symptoms but not to such a degree.

Thanks!

ArmyRover · 09-20-2007, 07:15 PM

A dying alternator I have found can cause all kinds of odd symptoms in the Rovers. So it honestly wouldn't surprise me if that had something to do with it. It's easy to pull out and have tested most places will test it for free i.e. napa autozone pep boys etc so it's certainly worth a try.

deadboy1977 · 11-14-2007, 02:38 PM

What did you ever find out???????

daway · 11-16-2007, 03:01 PM

code 48 is the stepper motor if that is what u mean by #48.

http://www.robisonservice.com/servic...ouble.asp#1990

09-20-2007, 04:56 PM	#1 (permalink)
Sign Guy Senior Member Join Date: Dec 2006 Location: Newnan, GA Posts: 114 Gallery: 0	Error Code 48/ Symptoms of a dying alternator So, just got the truck back from the shop(edit) after giving up on getting running right once the new head gaskets were on. They think that the problem is low compression but I think that must have something to do with it sitting so long. They told me that the compression of the right bank was 60-65 lbs which I find hard to believe considering I was getting 18-20 mpg at highway speeds. They didn't check the other bank. They replaced the plug wires and IAC unit but it seems to me to be running the same as when I took it in. Which is basically fine under throttle and very rough (missing and surging) at partial throttle only to die when you come to a stop. It really seems to me something electrical. On the way home from the shop the check engine light came on. It is "#48 Battery supply voltage - low". So my question is if my alternator was in the process of dying would this cause the other issues? Before I replaced the head gaskets I started having the same symptoms but not to such a degree. Thanks! __________________ Bill 93 LWB Westminster 155+k miles ArmyRover- "it's actually more of self inflicted torture chamber with doors and tires"- with this, I can relate! O Crap! decals - $3.00 to your door. Last edited by Sign Guy : 09-20-2007 at 06:09 PM.

09-20-2007, 07:15 PM	#2 (permalink)
ArmyRover Rebuilding Rover Join Date: Sep 2007 Location: NH Posts: 2,292 Gallery: 0	A dying alternator I have found can cause all kinds of odd symptoms in the Rovers. So it honestly wouldn't surprise me if that had something to do with it. It's easy to pull out and have tested most places will test it for free i.e. napa autozone pep boys etc so it's certainly worth a try. __________________ "Only two defining forces ever offered to die for you, Jesus Christ and the American G.I. One died for your soul, the other for your freedom." http://www.wheelinrovers.com/ 91 Range Rover Classic 90 RRC Parts truck 94 Saab gas mileage beater

11-16-2007, 03:01 PM	#4 (permalink)
daway Senior Member Join Date: Apr 2006 Location: St. Croix Valley, MN Posts: 1,300 Gallery: 0	code 48 is the stepper motor if that is what u mean by #48. http://www.robisonservice.com/servic...ouble.asp#1990 __________________ 2001 X5 3.0i "dodi" 1993 RRC, county LWB "bertha" 1991 RRC (dad's), parting out (email me or check out the link below) myroverworld

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11-14-2007, 02:38 PM	#3 (permalink)
deadboy1977 Senior Member Join Date: Mar 2006 Posts: 125 Gallery: 0	What did you ever find out???????

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