Service Engine Soon and Security Lights
Thread Starter
Teching In
Joined: Sep 2002
Posts: 27
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From: Cupertino, Ca
Service Engine Soon and Security Lights My Service Engine Soon and Security Lights go off after a few days. Is there something wrong, or is this normal? I thougth that those lights stayed on until you turned them off. The security light came on one time, I dont know why that came on, and the service engine soon light comes on every so often. Probably about once every month. I got it checked out the first time, it was the shift sylonoid. He said if the light comes on again to come back. The light didnt come on again for like a month. I waited to get it checked out, and by that time it was off. Then again just recently it came on again. My question is should i get it looked at, or wait and see if it goes off, or even if it goes out should I get it checked out? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Re: Service Engine Soon and Security Lights When your service engine soon (SES) light comes on, does it flash or does it just remain lit until it goes off? What I suggest doing, is wait until it comes on again. If you have a diagnostics tool like AutoTap hook it up and it will let you know what the problem is. If you dont have a diagnostics tool, you can take your car to Autozone and they do a free diagnostics reading with their scanner. But you can only read it if the SES light is on. How often has this occurred?
Thread Starter
Teching In
Joined: Sep 2002
Posts: 27
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From: Cupertino, Ca
Re: Service Engine Soon and Security Lights I would say it occurs one every month, maybe once every one and half months. If the light goes off does that mean the problem doesn't exist anymore? Or does it just stop notifying me that there is a problem?
Re: Service Engine Soon and Security Lights It sounds like there's some condition that triggers the SES light. After a few cycle, the condition is cleared and so is the SES. The best way of finding out is with a scanner. It will give you a code and you can enter the code on the "SES Code Translator" at the top of the Computer Diagnostics & Tuning page on this forum.
A few months ago my SES light came on. I didn't have a scanner at that time. So I reset my PCM and it cleared the light. A few weeks later it came back on, and by then I had a scanning tool (EFILive), and found out that I had a prob. with my o2 sensors. Someone on the this forum told me that it was probably due to the fact that I wasn't letting the cats warm up enough, but instead gunning my car while it was still cold. So, since then I've warmed up the car for a few minutes before driving off and haven't seen the SES light again.
So, next time you get the SES light, take it to Autozone (if you don't have a scanner) and they'll let you know what code your car is throwing.
A few months ago my SES light came on. I didn't have a scanner at that time. So I reset my PCM and it cleared the light. A few weeks later it came back on, and by then I had a scanning tool (EFILive), and found out that I had a prob. with my o2 sensors. Someone on the this forum told me that it was probably due to the fact that I wasn't letting the cats warm up enough, but instead gunning my car while it was still cold. So, since then I've warmed up the car for a few minutes before driving off and haven't seen the SES light again.
So, next time you get the SES light, take it to Autozone (if you don't have a scanner) and they'll let you know what code your car is throwing.
Thread Starter
Teching In
Joined: Sep 2002
Posts: 27
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From: Cupertino, Ca
Re: Service Engine Soon and Security Lights I went to get it checked out about 3 months ago, and the guy told me it was a shift solinoid. The guy I bought the car from said it would be one of the O2 sensors like you siad. So I am thinking something is wrong with the shift solinoid, but since the SES light isnt comming on right away after it turns off, is this problem big enough to fix, emplying that it is the shift solinoid that is triggering the light?
Re: Service Engine Soon and Security Lights If this is a M6 car, maybe the previous
owner tried defeating the "skip shift"
in a way that's marginal? Like, just
pulled the connector w/o adding the
resistor dummy, or attached the dummy
in such a way that it's making an
intermittent open circuit? That's what
"shift solenoid" comment suggests to me....
owner tried defeating the "skip shift"
in a way that's marginal? Like, just
pulled the connector w/o adding the
resistor dummy, or attached the dummy
in such a way that it's making an
intermittent open circuit? That's what
"shift solenoid" comment suggests to me....
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Verdad Gallardo Thread Starter
Teching In
Joined: Sep 2002
Posts: 27
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From: Cupertino, Ca
Re: Service Engine Soon and Security Lights Yeah I have the Yank ST-3500 stall in it. I just got it checked today. It came up as P0751 " 1-2 Shift Solenoid Valve Performance - No First or Fourth Gear" I was told to go to a transmission specialist to get it checked out further. I have been putting it in OD at 35-40 mph, so could it still be because I am in OD too early? Should I wait and see what happens, or should I take it to the transmission shop?
Thread Starter
Teching In
Joined: Sep 2002
Posts: 27
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From: Cupertino, Ca
Re: Service Engine Soon and Security Lights No, it is an A4. I am going to get it checked out today. How much will the part cost, and how easy is the solenoid to put in/get to? If it is the solenoid I'm just going to replace it, but if it is another problem I don't know if I should, because the SES light goes off and doesnt come on right away. I might be wrong, but that makes me thing that the problem isnt a big problem.
