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P1550 Code


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#1 ACES70

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Posted 15 January 2007 - 10:17 PM

I recently got a check engine light. Its P1550 "manufacturer controlled speed metering" or something close to that. Any ideas as to what might casue this? I just got some new rims and tires and I was thinking that maybe the larger size would throw off the speedometer. Could this be the case or is it something else?
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#2 POSTITSORGTFO

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Posted 15 January 2007 - 10:48 PM

QUOTE(ACES70 @ Jan 15 2007, 05:17 PM) View Post
I recently got a check engine light. Its P1550 "manufacturer controlled speed metering" or something close to that. Any ideas as to what might casue this? I just got some new rims and tires and I was thinking that maybe the larger size would throw off the speedometer. Could this be the case or is it something else?

lol

that would more then likely be the speed sensor on the transmission , if you change tires the car has no way of knowing , if I remeber correct you speed is told to you off the revolutions on the transmission and more then likley that sensor , its on the top of the transmission and is pretty easy to change , not 100% sure of location although

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#3 garbergtsi

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Posted 15 January 2007 - 11:36 PM

is the abs light on?

you dont have a speed sensor for the speedo on the transmission!

#4 Guest_Guest_Chilled Man_*_*

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Posted 15 January 2007 - 11:50 PM

QUOTE(garbergtsi @ Jan 15 2007, 11:36 PM) View Post
is the abs light on?

you dont have a speed sensor for the speedo on the transmission!

hmm then how does that work I always thought there was one ?

#5 garbergtsi

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Posted 15 January 2007 - 11:59 PM

vehicle speed is aquired through the ABS module by averaging the front 2 wheel speeds, then sent to the network to the ECM, instrument cluster, ect

#6 POSTITSORGTFO

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Posted 16 January 2007 - 12:53 AM

QUOTE(garbergtsi @ Jan 15 2007, 06:59 PM) View Post
vehicle speed is aquired through the ABS module by averaging the front 2 wheel speeds, then sent to the network to the ECM, instrument cluster, ect



uh duh why didnt I think of that blink.gif

so instead of the sensor being bad off the transmission it would be the sensor of the wheels?

ahh heres a great link smile.gif

http://volvospeed.co...s...c=68789&hl=

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#7 garbergtsi

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Posted 16 January 2007 - 03:40 AM

that link is a horrible link because of
a) its concerning a 95
B ) already on the second post, there is bad information.

Edited by garbergtsi, 16 January 2007 - 03:41 AM.


#8 Piglet

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Posted 16 January 2007 - 03:53 AM

QUOTE(ACES70 @ Jan 15 2007, 05:17 PM) View Post
I recently got a check engine light. Its P1550 "manufacturer controlled speed metering" or something close to that. Any ideas as to what might casue this? I just got some new rims and tires and I was thinking that maybe the larger size would throw off the speedometer. Could this be the case or is it something else?



I've got the same code +ABS light so if you figure this out, it'd be great wink.gif
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#9 ACES70

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Posted 16 January 2007 - 04:09 AM

My ABS light was on for a little while but then it went off. I got the code read and erased it and It hasnt come on yet, I drove it about 55 miles so far.
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#10 POSTITSORGTFO

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Posted 16 January 2007 - 04:36 AM

QUOTE(garbergtsi @ Jan 15 2007, 10:40 PM) View Post
that link is a horrible link because of
a) its concerning a 95
B ) already on the second post, there is bad information.



doh ok I am done posting on this thread since I cant seem to read it right ouch

hmm must be blink.gif tongiht dry.gif

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#11 ACES70

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Posted 16 January 2007 - 04:47 AM

QUOTE(Chilled Man @ Jan 15 2007, 05:48 PM) View Post
lol

that would more then likely be the speed sensor on the transmission , if you change tires the car has no way of knowing , if I remeber correct you speed is told to you off the revolutions on the transmission and more then likley that sensor , its on the top of the transmission and is pretty easy to change , not 100% sure of location although


Lol<- PWNED
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#12 garbergtsi

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Posted 16 January 2007 - 05:01 AM

basically the code means the ABS module either lost communication or there is a fault in either front WSS's.
You need to get a scantool to access the ABS to really diagnose it.

or just guess and say its the ABS module like everyone else does

#13 ACES70

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Posted 16 January 2007 - 06:13 AM

QUOTE(garbergtsi @ Jan 16 2007, 12:01 AM) View Post
basically the code means the ABS module either lost communication or there is a fault in either front WSS's.
You need to get a scantool to access the ABS to really diagnose it.

or just guess and say its the ABS module like everyone else does


Well I havent had any more trouble out of it, and if it is the ABS module I have two extras sitting around.
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#14 POSTITSORGTFO

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Posted 16 January 2007 - 06:19 AM

QUOTE(ACES70 @ Jan 15 2007, 11:47 PM) View Post
[b]

Lol<- PWNED


yeah who the hell knows what I was saying sad.gif

I should be posting that newbie smiles formyself on that one wink.gif

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#15 Piglet

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Posted 16 January 2007 - 06:40 AM

Make sure your speed sensors are seated right. If you put on new wheels there's the possibility you could've hit the wire to a sensor. There's nothing like having your speedo cut out while driving home and having to drive past a police station
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#16 POSTITSORGTFO

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Posted 16 January 2007 - 03:13 PM

QUOTE(garbergtsi @ Jan 15 2007, 06:59 PM) View Post
vehicle speed is aquired through the ABS module by averaging the front 2 wheel speeds, then sent to the network to the ECM, instrument cluster, ect


well since I already look like a bonehead in this thread , was there any volvo that had the speedo sensor on the transmission ?

or is that the Cruise control sensor ???

I am confused at this point and time ?

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#17 toohipsi

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Posted 20 January 2007 - 07:39 PM

If you erase the code and in time the light somes back on you can most of the time bank on a bad ABS module. The fact that you put new tires on wont set the abs light as long as the wheels and tires are the same diameter/circumference. Like someone said remove the wheels and make sure that the wheel speed sensors and exciter rings are intact, if they are then you probably have a high speed network communication problem ie:ABS Module. Hope this helps.
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