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Old 01-11-2009, 10:08 PM   #1
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Service engine soon

Hey guys, had the service engine soon come on today (at least I noticed it anyhow) Just had the oil changed and inspection done friday too.

I don't think anything is out of the norm so far, checked the gas cap, oil, air filter, I'm planning on taking it to autozone or oreilly's when I can to get their free diagnostic, probably wont be driving till friday though, I live on campus.

any quick/simple checks a non-mechanic like myself can do in the meanwhile?
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Old 01-12-2009, 12:55 AM   #2
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Re: Service engine soon

There's too many electronic sensors on a car to know where to start without getting the diagnostic code first, once the code is pulled you should be able to hone in on the problem much easier.. I would say just check over all the vacuum lines, if everything looks good/not cracked or leaking, you'd do best just getting the code read
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Old 01-12-2009, 05:13 AM   #3
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Re: Service engine soon

When you go make sure to write down any and all codes pulled then post them back here.
Then we can guide you in the right direction.
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Old 01-12-2009, 09:55 PM   #4
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Re: Service engine soon

two codes Ive been getting alot lately that havent effected the vehicles driveablity (wouldnt notice if they failed without the light) are OBD system readiness check not complete and a faulty O2 sensor, but you wont know for sure till you get the codes.
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Old 01-12-2009, 10:53 PM   #5
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Re: Service engine soon

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Originally Posted by Scorpion1 View Post
two codes Ive been getting alot lately that havent effected the vehicles driveablity (wouldnt notice if they failed without the light) are OBD system readiness check not complete and a faulty O2 sensor, but you wont know for sure till you get the codes.
Readiness code (p1000) will not trip the check engine light, it's stored in the computer until all emissions monitors clear, so inspection stations know if a car has just had the codes reset before coming in for inspection, trying to pass

Could very well be that p1000 won't clear for you as the H02s circuits are one of the systems with a readiness monitor, if that makes sense
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Old 12-02-2009, 07:16 AM   #6
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Re: Service engine soon

Hello, I have the same problem, as I have a 1999 mustang ( I just bought 1 month ago), & then the " service engine soon" light came on. Any ideas? Thank-you...
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Old 12-02-2009, 10:00 AM   #7
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Re: Service engine soon

drive it easy and get the codes ran, and then fix it (if you dont know what it means come here, but hopefully not with just the code but what the code means)
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Old 12-02-2009, 02:49 PM   #8
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Re: Service engine soon

Ok, I will get the code read.It is a /99 Mustang, & I just love it. It is the first mustang that I have owned. Thank-you....
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Old 12-03-2009, 08:48 AM   #9
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Re: Service engine soon

good to hear, and dont worry to much. Those cars are very cheap to work on so what ever it is I am sure we can help you fix it... heck a used good mileage engine is about 500 bucks
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Old 12-03-2009, 12:43 PM   #10
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Re: Service engine soon

most common problems on sixers are egr selonoids going out, O2 sensors goin bad, and a default in the pcv system.. ohh and lack of horsepower and torque.. lol

best bet to pinpoint the problem is get the codes checked @ the local parts store..

just let the chorale know and i'm sure either me or somebody on this forum could help you.
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Old 12-03-2009, 01:57 PM   #11
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Re: Service engine soon

I'm taking bets, I want to say it's going to be P0442, any takers?

But yes you can go to Autozone, or Advance Auto or AAMCO and they will tell you the code for free. Having a full description of the code is nice but the code should help just as much. Running the codes through Google will help and sites like OBDII.com or whatever is out there will give a lite breakdown of what's going on. (Meaning, Possible Causes, Possible Solutions).

When you get a hold of the code just post it up here and any other problems or information you have/they give you and we'll certainly help diagnose and fix it

Off Topic - does anyone else sing the AAMCO jingle when they go to spell it? "double aye, em see oh".
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Old 12-03-2009, 03:30 PM   #12
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Re: Service engine soon

Hey buddy, just want to let you know mine came on yesterday. Brought it to the shop and it turns out it was only a fuse.
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Old 12-10-2009, 09:41 PM   #13
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Re: Service engine soon

Hey guys can u help me I don't remember the exact code but my light came on and I got it scanned. The code was excess vacuum in gas tank... replaced the gas cap and still nothing. I looked at the hoses and dont see anything wrong with any of them. The lady at the Auto Zone told me to look down near the gas tank cant member exactly where cuz it was like 4 weeks ago but everything seemed fine. Any help?
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Old 04-30-2014, 08:29 AM   #14
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Service engine soon

Hey guys just wondering if any of you could help me figure out
Why my service engine soon light came on. I had them plug it in
And it through this code P0420. Has anyone else had this problem?
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