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Code 3 MAP 2 ecus 3 map sensors

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Old 07-24-2008, 06:34 AM
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Default Code 3 MAP 2 ecus 3 map sensors

I just finished putting my eg back together, i changed the main harness and threw a y8 in. I'm throwing a code 3 MAP sensor with a p28 and a p75, and ive changed the map twice now, it wont go away, WTF anyone have some ideas?
Old 07-24-2008, 06:41 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (speedooo)

did you check any of the wiring?
the code doesnt necessarilly mean the sensor or the ecu is bad.

i love when people napalm cars or just throw darts, and w/o even looking at a svc manual ask for help.
Old 07-24-2008, 06:41 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (speedooo)

Silly idea I know, but have you tried swapping the MAP and TPS plugs - they are the same and are easily mistakenly swapped when doing that swap.

Usually a MAP and TPS code will be thrown if this is the case, but usually MAP comes on immediately.
Old 07-24-2008, 06:44 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (boostedcivicsir)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedcivicsir &raquo;</TD></TR><TR><TD CLASS="quote">did you check any of the wiring?
the code doesnt necessarilly mean the sensor or the ecu is bad.

i love when people napalm cars or just throw darts, and w/o even looking at a svc manual ask for help.</TD></TR></TABLE>

Why the jab there?

For some people it's actually quicker/easier to swap such parts rather than tediously check wire-by-wire. If I've got a few extra sensors and ECUs lying around you can bet your *** I'll try those first - in this case the parts take literally 5 minutes to swap out.

I don't normally take that approach with everything, but if I were this guy I'd have done the same if I hadnthe extra parts. I wouldn't go to Honda and buy such parts without busting out a multi meter and checking wiring first, but spare parts can be a great diagnostic tool if you already have them.

Old 07-24-2008, 06:46 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (B18C5-EH2)

i didnt try that but i have done that before and the car wouldnt start, i believe the map wiring extends farther than the tps from the harness?
Old 07-24-2008, 06:48 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (B18C5-EH2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">

Why the jab there?

For some people it's actually quicker/easier to swap such parts rather than tediously check wire-by-wire. If I've got a few extra sensors and ECUs lying around you can bet your *** I'll try those first - in this case the parts take literally 5 minutes to swap out.

I don't normally take that approach with everything, but if I were this guy I'd have done the same if I hadnthe extra parts. I wouldn't go to Honda and buy such parts without busting out a multi meter and checking wiring first, but spare parts can be a great diagnostic tool if you already have them.

</TD></TR></TABLE>

thanks damn right ill swap out parts before i go and buy new parts...thats a possible waste of money that i cant afford

do you think its possible that something is wrong with the tb itself?
Old 07-24-2008, 06:57 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (speedooo)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by speedooo &raquo;</TD></TR><TR><TD CLASS="quote">i didnt try that but i have done that before and the car wouldnt start, i believe the map wiring extends farther than the tps from the harness?</TD></TR></TABLE>

Well I've seen them crank and run (like ****) with the plugs swapped. I mean technically one loom should be longer than the other, but the plugs are easily swapped still.

It was just an idea based on starting with the cheapest/simplest thing first, then working your way up.
Old 07-24-2008, 07:02 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (B18C5-EH2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">

Well I've seen them crank and run (like ****) with the plugs swapped. I mean technically one loom should be longer than the other, but the plugs are easily swapped still.

It was just an idea based on starting with the cheapest/simplest thing first, then working your way up.</TD></TR></TABLE>

i guess i should break out some a chiltons and an ohm meter?
Old 07-24-2008, 07:10 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (speedooo)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by speedooo &raquo;</TD></TR><TR><TD CLASS="quote">

i guess i should break out some a chiltons and an ohm meter?</TD></TR></TABLE>

No.

Break out a Helm manual and an ohm meter.



I don't trust Haynes/Chilton as far as I can throw them. Helm makes the Honda manuals and have specific flow charts for each code.
Old 07-24-2008, 07:30 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (B18C5-EH2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">

No.

Break out a Helm manual and an ohm meter.



I don't trust Haynes/Chilton as far as I can throw them. Helm makes the Honda manuals and have specific flow charts for each code.</TD></TR></TABLE>

point taken. ill go buy a helms when i get off work and the break out the beer and an ohm meter
Old 07-24-2008, 07:56 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (speedooo)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">Why the jab there?
</TD></TR></TABLE>

you are right, i am having a bad day, no good work again, no power in my house since 5 yesterday my freezer is now completely thawed out,

but after 2 ecu's and 3 maps, unless they are all bad, you need to start looking elsewhere.

to the o.p. i am sorry for flying off like that i am not usually like that. i have not had my happy pill yet today he hee.
Old 07-24-2008, 09:27 AM
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Default Re: Code 3 MAP 2 ecus 3 map sensors (boostedcivicsir)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedcivicsir &raquo;</TD></TR><TR><TD CLASS="quote">

you are right, i am having a bad day, no good work again, no power in my house since 5 yesterday my freezer is now completely thawed out,

but after 2 ecu's and 3 maps, unless they are all bad, you need to start looking elsewhere.

to the o.p. i am sorry for flying off like that i am not usually like that. i have not had my happy pill yet today he hee.</TD></TR></TABLE>

no problemo thanks for the suggestion
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