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Error code p2100

Got manual to fix but I cant find location of ETS relay! All pics Ive seen are generic and tell me nothing

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  • kakima Nov 06, 2014

    Your question is pretty generic and tells us next to nothing. Could you specify the year, make, and model of your vehicle?

  • Jeff Sperry
    Jeff Sperry Nov 06, 2014

    It is a Hyundai Santa Fe 2006 V6 3.5L

  • Jeff Sperry
    Jeff Sperry Nov 07, 2014

    Found relay(fail safe relay) it was good. Ended up being a bad PCM, according to the Hyundai service manual after following protocol.



1 Answer

Now you know why, you ONLY buy the factory
service manuals --even though they cost hundreds
of dollars

Too Generic---- I hope others read your post

I can not get through to anyone, about the importance
of quality info

Now my guess is-- your not where you understand OBD Systems

So do not throw parts at codes,it doesn't work that way & relays
may never fail in your lifetime

Whether you have codes or parts,they all have to be component

If you find no problem,you need no parts & have learned
nothing swapping out parts

For relays,find a similar one in the same distribution box & try
switching them

Have to read the top of the relay,they have to be the same

You have no vehicle shown here & any code can be for a different
fault, on a different brand vehicle

There is more to vehicle circuits & codes, than just the relays &
other items,you have wires & where they come & go to consider

SO-- get the factory diagnostic manuals or CD & follow the trouble
charts, to find a problem

Also a professional scan tool & checking ALL Modules for codes
is a good place to start

Posted on Nov 06, 2014

  • Jeff Sperry
    Jeff Sperry Nov 08, 2014

    Ended up being PCM according to the hyundai manual



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SOURCE: speed sensor location 2004 hyundai xg 350

cant help with a pic iam afraid but look on the diff housing passenger side and on top is the speed sensor ,their is no input sensor it just goes to the computer and from their to the dash ,it could be the sensor or the nylon drive gear ,you can check the sensor with a multimeter once you get it out

Posted on Apr 13, 2012

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Hi Friend:

In checking your Codes heres the Data.

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Note: you have Fuse Blocks inside your Vehicle and Under your Hood as well, They'll be Labelled Fuses and Relays.

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