Check engine light... panic? - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
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post #1 of 21 (permalink) Old 11-09-2004, 06:55 PM Thread Starter
 
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Check engine light... panic?

I just came home from work and on the way the check engine light suddenly came on. My oil change was "officially" due 25 miles ago (going on Saturday), but I'm not confident that's what made the light come on. The engine sounds fine and the car runs just as it usually does, but now I'm afraid there's some kind of serious shit going on. Any ideas?

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post #2 of 21 (permalink) Old 11-09-2004, 07:01 PM
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Check your codes
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post #3 of 21 (permalink) Old 11-09-2004, 07:02 PM Thread Starter
 
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Well, I can't really get to someone who can check that until the weekend and meanwhile I need the car for work etc. I'm worried that I might do lasting damage do that car by driving it when I shouldn't... :(
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post #4 of 21 (permalink) Old 11-09-2004, 07:15 PM Thread Starter
 
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Holy shit.... Just checked the oil level and there's almost no oil in the engine. Testing on the stick reveals a level well BELOW the minimum... Someone please tell me that's most likely the reason the light is on. At least that's an easy fix. I guess I'll do that engine flush and mobil 1 thing next time around.
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post #5 of 21 (permalink) Old 11-09-2004, 07:16 PM
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Sounds like you found your answer. BTW, you can check your own codes. Do a search for "Check engine codes" or something similar.

https://dodgeintrepid.net/forums/showthread.php?t=9490

Last edited by DodgeyAussie; 11-09-2004 at 07:22 PM.
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post #6 of 21 (permalink) Old 11-09-2004, 07:27 PM Thread Starter
 
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Thanks for the link. I came up with the code 0406 and it says in the explanation: "EGR position sensor voltage wrong." Is that related to the missing oil or what does that mean?

On the allpar link it says "EGR position sensor input above the maximum accepted voltage range (shorted high)"?

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post #7 of 21 (permalink) Old 11-09-2004, 07:35 PM
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That i don't know. Might have to wait for Hypnos or someone with more knowledge than i to answer that question. Aren't ya glad you checked your oil anyways?
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post #8 of 21 (permalink) Old 11-09-2004, 08:20 PM
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The check engine light will NOT come on with low oil levels. It came on because of the code you pulled. Keep that oil level up! And......if you're not using Mobil 1 or equivalent, Get on it!!
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post #9 of 21 (permalink) Old 11-09-2004, 08:58 PM Thread Starter
 
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Thanks guys. And yes, I sure am glad I did check the oil. That could easily have been a minor disaster. I hope someone who knows more about these codes will reply. I was going to start using Mobil 1 synthetic, but that'll have to wait until the next time I have to change the oil. I just came from the store where I bought some Mobil Clean Drive or something like that. I hope this code doesn't require an expensive repair. :(
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post #10 of 21 (permalink) Old 11-09-2004, 09:21 PM
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Keep closer watch on your oil level from now on.

EGR valve is a part of emissions. It's nothing critical. But, the solenoid probably needs replacing..
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post #11 of 21 (permalink) Old 11-09-2004, 09:41 PM Thread Starter
 
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Thank you, Hypnos. I just gave it new oil, new water and washer fluid.
What exactly is the solenoid and what will it cost to replace?
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post #12 of 21 (permalink) Old 11-10-2004, 08:14 PM Thread Starter
 
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Ok, so the light went away today. But it's still giving the same 0406 code? Could it be that whatever 0406 is it's not "serious" enough to make the light go on itself and it was really because the engine didn't have enough oil?

Now this is the excuse to take extra good care of her - tune up, getting washed, new oil and air filter and perhaps some aftermarket audio.

Funny how smooth it runs now it has oil...


Last edited by Treppin99; 11-10-2004 at 08:26 PM.
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post #13 of 21 (permalink) Old 11-10-2004, 09:09 PM
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i got the 0406 code a few months back, i disconnected the battery to clear the computer. I'm still waiting for it to come back on. Anyway my point is that it might have been a fluke.

You might want to investigate where that 1+ quart of oil went.... either on the ground, out the exhaust or someplace else in the engine.
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post #14 of 21 (permalink) Old 11-10-2004, 09:13 PM
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The code that you pulled will stay in the memory of the car for the next 20 key/ignition cycles (I think). Stays there so that the service garage can at least look back for a short time to see what the car has been doing. This is normal, and if you check it again in a week or two the code will just be gone...

As far as the 'check engine' light goes, it will come on whenever a service code gets registered in the system. It will stay illuminated for the next number of key/ignition cycles at which time it will turn off if the problem is no longer a problem.

Also be aware that the 'check engine' light can illuminate and stay on, or blink. If it's blinking, stop the car & engine immediately as this indicates a critical problem that further running make much worse. If it just lights and stays lit, it's a problem that you should either take it in for and they'll scan the codes for the problem, or as you've done already, check the codes yourself.

With your issue I'd say that the low oil likely caused this code. The EGR (Exhaust Gas Recirculation) valve is part of a system that controls harmful emissions of the engine, as well as ping control, among other things. Without looking in the manual I couldn't tell you where it's exactly located at on your engine, but in the old days it was right next to the air cleaner, mounted right to the top of the engine - an easy replacement if needed. In these newer days, this valve has a sensor mounted on the top that detects its position and reports it back to the car computer. On your car it probably was stuck in a high position as a result of the greatly diminished oil supply. Oil pressure has everything to do with the proper operation of this and many other systems on the car. Once you got oil back in the engine and the computer monitored all the sensors for a while again it turned off your 'check engine' light.

P.S. - here's a pretty good article on the subject:

http://www.kemparts.com/TechTalk/tt12.asp

Lots more with a google search:

http://search.yahoo.com/search?p=EGR...b-t&fl=0&x=wrt

Tom.

Last edited by Snorton Norton; 11-10-2004 at 09:16 PM.
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post #15 of 21 (permalink) Old 11-10-2004, 11:51 PM Thread Starter
 
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Yes, I will try to find out what happened, LHS. There might be leak of some sort somewhere. Thanks.

And thanks a lot, Snorton, for that explanation. That helps me out a lot. I appreciate the time you took writing about it and looking further into the subject.
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