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Author Topic: Throttle Position Load Signal  (Read 1782 times)

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richard1967

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Throttle Position Load Signal
« on: 09 February 2010, 19:18:43 »

Hi Ive got the following fault code P1555, which is Throttle position load signal not pausible

So, on this basis how straight forward is it to change the throttle sensor??

Cheers
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rustym95

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Re: Throttle Position Load Signal
« Reply #1 on: 09 February 2010, 19:21:47 »
would take off and give a clean and also wile it is off put some switch cleaner in the hole and shack it around in side should work again after it dryed out :y
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richard1967

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Re: Throttle Position Load Signal
« Reply #2 on: 09 February 2010, 19:25:23 »
Ok, do you know if theres a guide on here for cleaning the throttle body housing, or the sensor ?  Ive had a search around, and cant find a guide- probably me going mad!
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rustym95

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Re: Throttle Position Load Signal
« Reply #3 on: 09 February 2010, 19:28:25 »
no there is not from what ive seen but do as said and you will be fine as work so many times just un screw it off and give a good clean they get a build up of muck in side and if seal on plug is going the damp gets in, :y
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richard1967

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Re: Throttle Position Load Signal
« Reply #4 on: 09 February 2010, 19:32:09 »
Thanks for that....Ive just found this which I think is the nearest to a guide for cleaning the throttle body plus alot of other things  http://www.omegaowners.com/forum/YaBB.pl?num=1207387811
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Marks DTM Calib

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Re: Throttle Position Load Signal
« Reply #5 on: 09 February 2010, 19:38:29 »
What engine....
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richard1967

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Re: Throttle Position Load Signal
« Reply #6 on: 09 February 2010, 19:40:58 »
2.2 on a 2002 auto
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davethediver

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Re: Throttle Position Load Signal
« Reply #7 on: 09 February 2010, 19:51:26 »
Quote
Thanks for that....Ive just found this which I think is the nearest to a guide for cleaning the throttle body plus alot of other things  http://www.omegaowners.com/forum/YaBB.pl?num=1207387811

Or you could try this which is the exact guide for your engine

http://www.omegaowners.com/forum/YaBB.pl?num=1162397695

 :y :y
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richard1967

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Re: Throttle Position Load Signal
« Reply #8 on: 09 February 2010, 20:05:52 »
Oke doke, I will give that a bash then.  It looks pretty straight forward even for a novice like me
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Kevin Wood

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Re: Throttle Position Load Signal
« Reply #9 on: 09 February 2010, 20:39:09 »
Quote
2.2 on a 2002 auto

It's drive by wire, so it won't be the TPS. Might be worth a try cleaning the throttle but if that fails I'd be looking for an induction air leak, clogged air filter or maybe a faulty MAF.

Kevin
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richard1967

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Re: Throttle Position Load Signal
« Reply #10 on: 09 February 2010, 20:41:53 »
.......even though Ive had the codes read twice and the fault code is P1555, which is Throttle position load signal not pausible
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Kevin Wood

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Re: Throttle Position Load Signal
« Reply #11 on: 09 February 2010, 20:47:26 »
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.......even though Ive had the codes read twice and the fault code is P1555, which is Throttle position load signal not pausible

On a drive by wire engine the ECU is setting the throttle position, because it's moving the throttle, not the driver. For this reason, if there was any doubt on the throttle position (DBW cars have dual redundant sensors on the throttle) it would go into limp home.

What it is seeing is some other characteristics of the engine (e.g. air/fuel volume) which is not consistent with the throttle position and RPM at which the engine is operating. That's why I say look for an induction leak or blockage.

Is it performing how it should? No running issues?

Kevin
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richard1967

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Re: Throttle Position Load Signal
« Reply #12 on: 09 February 2010, 21:02:19 »
Its gutless.  Theres no stalling, but if I floor the throttle the power isnt there as it should be. The problem seems to occur when theres a 2 to 3 rd gear change at approx 30 mph at 1500rpm
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Kevin Wood

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Re: Throttle Position Load Signal
« Reply #13 on: 09 February 2010, 21:33:25 »
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Its gutless.  Theres no stalling, but if I floor the throttle the power isnt there as it should be. The problem seems to occur when theres a 2 to 3 rd gear change at approx 30 mph at 1500rpm

In that case I wonder if it's a faulty MAF.  :-/ It would be useful to see some live data from it.

Kevin
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Marks DTM Calib

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Re: Throttle Position Load Signal
« Reply #14 on: 09 February 2010, 21:38:46 »
Unplug the MAF and see if it runs any better
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