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Author Topic: EML code  (Read 1004 times)

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acura

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EML code
« on: 03 April 2010, 17:42:19 »
Hi, I've had an intermittent EML which rarely pops up, doesen't appear to affect the car's performace and clears on start-up.

Just read the code and it's P1890, 'PCM  Data Input Circuit or Throttle Position Signal Input'.

Any of you boffins able to advise me as to what this means and how to cure in the world of Omegas please? The car is a 2002 2.2 CD Auto.

Thanks.  ;)
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Welung666

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Re: EML code
« Reply #1 on: 03 April 2010, 18:19:40 »
Thats an odd cope! P1890 is throttle program???  Is that the only code? Niether of the TP sensors showing a fault?

EDIT: just looked the code up on the BBA Reman Vx specific lists:-

Quote
P1890 ECM Data Input Circuit
P1890 Throttle Position Signal Input
« Last Edit: 03 April 2010, 18:22:57 by Welung666 »
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acura

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Re: EML code
« Reply #2 on: 03 April 2010, 18:46:55 »
Trust my old tub to have an awkward fault!  ;D

We used a MAXSCAN code reader and there were no engine codes stored or pending so we tried the Auto trans, again, no stored but this came up as a pending code. There were no other codes at all.  :-?

Anyone have any clues?
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tunnie

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Re: EML code
« Reply #3 on: 03 April 2010, 19:13:52 »
odd one, worth cleaning the throttle body, we have a guide in the maint section  :y
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acura

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Re: EML code
« Reply #4 on: 03 April 2010, 19:19:21 »
Cheers Tunnie, I was thinking along those lines myself. do you know anything about the Throttle Position Sensors by any chance? Could they have something to do with this and if so can they be replaced/cleaned/repaired?  :y
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tunnie

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Re: EML code
« Reply #5 on: 03 April 2010, 19:23:06 »
Quote
Cheers Tunnie, I was thinking along those lines myself. do you know anything about the Throttle Position Sensors by any chance? Could they have something to do with this and if so can they be replaced/cleaned/repaired?  :y

There are two..... *i think* one is on the pedal to see how much your booting it, another in the throttle body itself to see how far throttle body is open.

Worth giving body a good clean first to rule that out, do you have a code reader?

One idea, reset the code so its cleared, turn ignition on only ( don't start it) pump the go pedal, then check the codes again, that could help point to which sensor...
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acura

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Re: EML code
« Reply #6 on: 03 April 2010, 19:45:24 »
Righto.

Sounds like good advice. I'll do the clean next weekend, need some gaskets first.

Yep, I have a reader so that'll be my next try.

Interestingly, the EML seems to come up on the same stretch of road I travel every morning. It comes up very infrequently but when it does its almost always at that point which indicates that certain conditions trigger the fault. Coming from a 50mph stretch into a 30mph zone, I'm off the gas and letting the car slow naturallythen catching the car on the throttle to maintain speed. This is the point when the EML lights. I know it sounds a bit odd but those are the circumstances!   :-[ ;D
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TheBoy

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Re: EML code
« Reply #7 on: 03 April 2010, 19:55:39 »
As tunie suggests, I would consider cleaning throttle body and the breathers - certainly wont do any harm anyway :y

Does your code reader allow Live data, so you can see what pedal position sensor and throttle position sensor are saying together?

Lastly, was this code in the engine ecu or the gearbox ecu?
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acura

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Re: EML code
« Reply #8 on: 03 April 2010, 21:10:03 »
Cheers TB,

Yep, will do the throttle body next chance I get.

The code reader does allow live data, how should the two readings match up?

Code was in the auto gearbox ecu.  :)
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TheBoy

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Re: EML code
« Reply #9 on: 03 April 2010, 21:29:52 »
Quote
Cheers TB,

Yep, will do the throttle body next chance I get.

The code reader does allow live data, how should the two readings match up?

Code was in the auto gearbox ecu.  :)
Hmmm, in gearbox ECU....  ....interesting.

No other codes in engine ecu? WHat about abs ecu?
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acura

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Re: EML code
« Reply #10 on: 03 April 2010, 21:50:34 »
OK, given that my maxscan MS509 is limited and I am even more limited I wasn't aware that the ABS ecu was readable   :-[

No engine codes at all so tried the autobox and there were no stored codes but only this one pending code.

May be worth a mention that sometimes there seems to be a slight 'missed beat' when the engine is held at steady lowish revs but idle is smooth and car runs well.
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Re: EML code
« Reply #11 on: 03 April 2010, 21:53:54 »
The engine, abs and gearbox all are very friendly, and constantly chat to each other
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acura

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Re: EML code
« Reply #12 on: 03 April 2010, 22:01:56 »
Like most folks on here then.  :D

I'll still do the throttle body clean and take things from there. As a long shot, is it unknown for the spindle on the flap in the tb to become so worn it rattles? There seems to be a rattle from that area that I'd like to sort out.
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