Hey I want to check if my CEL works and I have a feeling it doesnt. Is there a safe way to turn it on to check that it works. Car is a 99 Civic Si.

 

It should light up just starting the car.
But if you want to create a cel, you can unplug the intake temp sensor or the primary o2...those seem the quickest to me

 

When you first get in your car turn the key to the ON position and the CEL should be on for a couple of seconds.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pdiggitydogg &raquo;</TD></TR><TR><TD CLASS="quote">It should light up just starting the car.
But if you want to create a cel, you can unplug the intake temp sensor or the primary o2...those seem the quickest to me</TD></TR></TABLE>
correct

 

ok thanks for the replies. The CEL does come on when you first turn the key. Right now on my short ram intake it does not have a hole for the Intake Air Temp sensor so it is just in the engine bay and there is no CEL. To turn on the CEL i would have to take out the "tip" on the sensor correct? Thanks again.

 

no, just disconect the electrical connection to it.
And you really should get that sensor in there

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboEM1 &raquo;</TD></TR><TR><TD CLASS="quote">Right now on my short ram intake it does not have a hole for the Intake Air Temp sensor so it is just in the engine bay and there is no CEL. To turn on the CEL i would have to take out the "tip" on the sensor correct? Thanks again.</TD></TR></TABLE>

Having the IAT sensor loose in the bay wouldn't necessarily trigger a CEL (and in almost all cases won't), so if that's the reason you're concerned, don't be.

 

Is the temp sensor really necessary? I'v had mine dangling next to the intake for about a month with no problems

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboTagTeam &raquo;</TD></TR><TR><TD CLASS="quote">Is the temp sensor really necessary? I'v had mine dangling next to the intake for about a month with no problems </TD></TR></TABLE>

your a/f ratio is probably not optimal since it's just measuring under hood temps instead of the temp in your air intake system

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">
Having the IAT sensor loose in the bay wouldn't necessarily trigger a CEL (and in almost all cases won't), so if that's the reason you're concerned, don't be. </TD></TR></TABLE>

Yea thats what i was concerned with

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboTagTeam &raquo;</TD></TR><TR><TD CLASS="quote">Is the temp sensor really necessary? I'v had mine dangling next to the intake for about a month with no problems </TD></TR></TABLE>

Thats how mine is

 

Hey guys guess what. I was driving today and you know what happens? My check engine light came on and i didnt try to set it off. I checked the code and it threw a

P0505 Idle Control System Malfunction

I erased it but it came back about an hour later. What is wrong? What part should i buy? Check this thread out.

https://honda-tech.com/zerothread?id=1161900

Thanks