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Old 10-18-2010, 01:31 AM
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Check Engine Light

Hello,
Yesterday my check engine light came on again for the second time in 3 months, the first time I took it in and they told me it might be one of the ho2 sensor and they did a code reset.
I was wondering if anyone knows about this issue and if its something i can change my self, I am capable of doing minor work, are there any instructions or information on how to change it and to know what sensor needs to be replaced as well if thats the case.

Thanks in advance.
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Old 10-18-2010, 01:52 AM
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Re: Check Engine Light

did you check if your gas cap is closed properly? your check engine light will come on too if your gas cap is not tight closed
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Old 10-18-2010, 09:04 AM
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Re: Check Engine Light

Yes I did check the has cap, that is not the issue.
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Old 10-18-2010, 10:36 AM
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Re: Check Engine Light

I'm having the same issue right now too. I just changed the o2 sensor yesterday and my gas cap is closed tightly so what else could it be? Any suggestions or advice?
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Old 10-18-2010, 11:41 AM
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Re: Check Engine Light

Have you pulled the CEL code to see what the problem is? That is always the first thing you should do.
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Old 10-18-2010, 04:37 PM
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Re: Check Engine Light

Quote:
Originally Posted by merlin View Post
Have you pulled the CEL code to see what the problem is? That is always the first thing you should do.
How do you do that?
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Old 10-18-2010, 05:07 PM
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Re: Check Engine Light

How To Diagnose Engine Error Codes For Your Honda Prelude

Good luck.
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Old 10-18-2010, 05:19 PM
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Re: Check Engine Light

Instead of screwing around with that...


Go to Autozone. Get one of those chuckleheads to plug a OBD2 scan tool into your OBD2 diagnostic port. Its on the passenger side kick panel that would be your left if you're sitting in the passenger seat. They can plug into it and give you a code. Then go to OBD-II Trouble Codes - DTC Codes Car Repair and look up the code.



Or you could have just looked this up on google in under 5 seconds.
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Old 10-18-2010, 06:09 PM
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Re: Check Engine Light

Quote:
Originally Posted by IanQ View Post
Thanks man! It doesn't seem its the same the same in the 5th gen. Anyone got some info?

Last edited by Ballez; 10-18-2010 at 09:15 PM.
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Old 10-18-2010, 06:12 PM
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Re: Check Engine Light

Heads up auto parts stores won't lend or scan your car in California... Stupid people sued because they bought parts off the code was given instead of troubleshooting.
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Old 10-18-2010, 06:13 PM
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Re: Check Engine Light

Quote:
Originally Posted by havikprelude View Post
Instead of screwing around with that...


Go to Autozone. Get one of those chuckleheads to plug a OBD2 scan tool into your OBD2 diagnostic port. Its on the passenger side kick panel that would be your left if you're sitting in the passenger seat. They can plug into it and give you a code. Then go to OBD-II Trouble Codes - DTC Codes Car Repair and look up the code.



Or you could have just looked this up on google in under 5 seconds.
Thanks for trying to help, first of all I don't live in the USA, if I'm gonna take to a shot they will charge at least $60, I much rather save that for a tank of gas to cruise around and this way I get to learn about the car.
F@$k google lol!
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Old 10-18-2010, 08:12 PM
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Re: Check Engine Light

ok ok really quickly sorry Ballez but i don't mean to butt into your thread. I'm having the same problem too and just figure i could use it really quick.

I'm having the same CEL issue. I have a 4th Gen and recently did a h23 swap. I'm using the correct p14 ecu and i changed my o2 sensor yesterday. So what else could it be? Would the knock sensor have anything to do with it?
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Old 10-18-2010, 08:47 PM
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Re: Check Engine Light

Quote:
Originally Posted by handballallday View Post
ok ok really quickly sorry Ballez but i don't mean to butt into your thread. I'm having the same problem too and just figure i could use it really quick.

I'm having the same CEL issue. I have a 4th Gen and recently did a h23 swap. I'm using the correct p14 ecu and i changed my o2 sensor yesterday. So what else could it be? Would the knock sensor have anything to do with it?
Oh no problem man, hope it helps you as well :)
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Old 10-18-2010, 09:41 PM
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Re: Check Engine Light

Quote:
Originally Posted by Ballez View Post
Thanks man! It doesn't seem its the same the same in the 5th gen. Anyone got some info?
No idea. I'm sure you can check to see if that connectors there.
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Last edited by IanQ; 10-18-2010 at 09:44 PM.
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Old 10-18-2010, 11:00 PM
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Re: Check Engine Light

Thanks I apreatiate it
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Old 10-19-2010, 04:08 AM
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Re: Check Engine Light

I wounldnt bother taking your car somewhere to get the code read with a code reader, not when this is a piece of piss that takes two minutes once you know what your looking for.


Quote:
Originally Posted by Ballez View Post
Thanks man! It doesn't seem its the same the same in the 5th gen. Anyone got some info?
Below is the procedure for a RHD car, the connector will be in the same place (ie in the passenger footwell in a USDM car)


Quote:
Originally Posted by nitin_s1
Paper-Clip test on a 5th gen!

1. Firstly go to your passenger side foot well.. And take out this plastic bit (arrowed/circled in Red on the bottom pic)



2. The take out the Blue Connector, which is hanging there.. You need to look out for a Two wire connector. (it has Red and Green wire coming out)



3. In that connector put a paper clip (or anything that is conductive). ( This is also called Shorting the Service Connector!!)

4. Turn your Ignition to ON but DO NOT START YOUR ENGINE!
Honda Prelude | How to Reset 4WS and how to do the Paper Clip test (5th gen) : Guides / How to's / Tech Section

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Last edited by merlin; 10-19-2010 at 04:12 AM.
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Old 10-20-2010, 09:34 AM
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Re: Check Engine Light

Thanks! That's great!!
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Old 10-20-2010, 11:06 AM
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Re: Check Engine Light

ok but what do you do after you put in the paper clip? Will this same method apply to 4th gens?
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Old 10-23-2010, 06:57 AM
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Re: Check Engine Light

Read this (stickied in DIY Do-It-Yourself):

How To: Diagnosing Your Check Engine Light (OBD I)

Its the same for 4th & 5th gens.
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Old 10-23-2010, 11:12 AM
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Re: Check Engine Light

Quote:
Originally Posted by handballallday View Post
ok but what do you do after you put in the paper clip? Will this same method apply to 4th gens?
Count the Blinks.
Long blinks are for Tens (1X, 2X, 3X, 4X, 5X.....)
Short Blinks(X) are for 1-9....

SO....
You turn your key, the CEL will blink....
example: Long, Long, Short, Short, Short... would be a Code 23.

It will continue to cycle thru each and every Code your ECM has stored with a Pause between different codes.

The process is VERY simple....
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