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CEL code


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The check engine light has come a couple of times this week, the code is 1120

Thottle valve signal implausible.

Any troubleshooting info would be greatly appreciated

(Previous codes 0102, 1124 and 1126 not comming after MAF replacement)

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The check engine light has come a couple of times this week, the code is 1120

Thottle valve signal implausible.

Any troubleshooting info would be greatly appreciated

(Previous codes 0102, 1124 and 1126 not comming after MAF replacement)

I suppose I just change the Thottle valve. I have been very unlucky getting answers in this forum. I would doubt that nobody knows these type of questions.

:unsure:

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There are three different DMEs for the Boxster - some codes are different. If would be really helpful if you told us the model year, standard or S version and any mods.

And, are these Pcodes or Porsche fault codes?

1998 manual

I read the code with a (cheap) OBDII scanner, the booklet specifies: 1120 = throttle position (TP) sensor out of range low and I got the reading 0120 las week = throttle position sensor/switch A circuit malfuntion. Which DME should I use from the Porsche ODB-II P-Code Menu for a more specific definition?

The readings appear at low speed or idle.

Thanks for your help

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A MY98 Boxster would be DME 5.2.2.

If those are Pcodes then your scanner is funny... P1120 does not occur in a DME 5.2.2 nor does P0102.

Try gong to an Autozone and get hem to read the codes (for free) write them down and report them here.

Also, tell us how your engine is running. Is running okay except for the CEL? or does misfire and/or stumble?

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A MY98 Boxster would be DME 5.2.2. 

If those are Pcodes then your scanner is funny... P1120 does not occur in a DME 5.2.2 nor does P0102. 

Try gong to an Autozone and get hem to read the codes (for free) write them down and report them here.

Also, tell us how your engine is running. Is running okay except for the CEL? or does misfire and/or stumble?

It runs very good with the exception of the idle speed which in a few occasions goes down then comes up again.

I'll do as you suggested and also keep an eye on the codes I read to make sure I did not make a mistake when I wrote them down.

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