ses light really important???
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Elder User
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From: missoula montana
ses light really important???
is the ses light even worth haveing it comes on and truck still runs fine. obviously if truck runs bad you know it them can check into it. does the light tell you anything you wouldnt already feel? that might be harming it
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From: 21791
its more of a "hey we're just letting you know that you threw a code" more than "service the engine soon because it set a code". just pull the code, and see what it is. most likely it's from a power adder. the reason the code is thrown, is because the PCM is still using stock parameters for ICP and boost pressure. so, once it's surpassed with aftermarket tuning, the light comes on. most of us ignore it, or just bypass it with a boost regulator to the MAP line.
Hotshot
Joined: Dec 2003
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From: iowa
strokin I could be wrong (It happens on occasion) but when it sets the over boost light doesn't the PCM begin pulling fuel out of the engine (defueling) thus reducing the power your putting out? which is why you really need the boost regulator in the map line so that the pcm doesn't think there is too much boost and start chopping the power back.
Post Fiend
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From: 21791
yes, you are correct. that is why most people limit the airflow to the MAP sensor somehow. i use a relief valve, but i still get the SES light at only 25 psi, it seems that is all i can make on 140hp. going to a regulator here.
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From: Hartford, WI
It is important. Lets say you have a known SES light condition because of a tuner. You ignore it, right? OK. If another code does come up, how do you know till you are throwing a rod or something bad? Now, on my 91 Firebird, I have certain known conditions. It will throw a code 32 which is for the EGR because the guy who put it together (lets call him me) "forgot" to put it on. What did I do? Delete the code. That way it doesn't trigger the SES light for EGR and if somethign comes up, I know what it is.
To answer your question, it depends. I know what you're thinking: "Is this a serious code that could wreck my engine or not?" Well, to tell you the truth in all this excitement, I've kinda lost track myself. But, being this is a 7.3L Powerstroke engine, a very expensive engine, and would blow your wallet clean off, you've got to ask yourself one question: "Do I feel lucky?" Well, do ya punk?"
To answer your question, it depends. I know what you're thinking: "Is this a serious code that could wreck my engine or not?" Well, to tell you the truth in all this excitement, I've kinda lost track myself. But, being this is a 7.3L Powerstroke engine, a very expensive engine, and would blow your wallet clean off, you've got to ask yourself one question: "Do I feel lucky?" Well, do ya punk?"
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From: missoula montana
yes but does it ever tell you anything important that you already wouldnt know by how it is running. mine is the p1211 and my truck runs fine get the code without tuner sometimes to
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From: Hartford, WI
Well, when the mass air meter on my 99 MB went south, the car was running fine too. Scanned the codes and it said that the left and the right O2 sensors were reading way too lean. It was the Mass air meter that was giving it bad values so the fuel was insufficient for the load. Car was running fine too. What does running too lean do again?
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Elder User
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From: missoula montana
thats what im trying to ask??? is there anything on the diesels that we wont know is wrong with out the ses. does it EVER show something serious. at the shops around here they call it the check your wallet light
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From: Cabot, Arkansas
Originally Posted by strokin_it7.3
i use a relief valve, but i still get the SES light at only 25 psi, it seems that is all i can make on 140hp. going to a regulator here.
Originally Posted by mtgrzlyman
yes but does it ever tell you anything important that you already wouldnt know by how it is running.
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From: Hartford, WI
Originally Posted by cookie88
It's there so people that don't know jack about codes will know that something is wrong and they need to have it checked out.
Last edited by aklim; Mar 19, 2006 at 07:41 PM.
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From: Hartford, WI
Originally Posted by mtgrzlyman
i just Hate the damn light if its not important ever i want to get rid of it.
Are you sure something is not wrong?
I had the SES light on my 02 GMC Yukon XL. It said the O2 sensors that were precat were slow. They were fine before the headers came on. Well, it turns out that the headers kept the sensors too cool. Changed them and the light never came back. On my scanner, I could see that the old sensors were kinda lazy and the new ones move much faster. That faster picked me up 1 mpg.
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From: missoula montana
ive had it in the dealership many times in the past for this p1211 and they always said everthing was in spec, infact they always said it was really good. they actually changed the pcm thinking it was defective but made no difference still got code when towing heavy up the mountains i just get it alot quicker with the chip??