Date: Sat, 28 Dec 2002 13:26:23 -0500 From: "Kenneth S." <nimrodnopsams.com> Subject: Re: check engine warning light
I've had two bouts with the check engine light on my 1996 900SE -- the first about a year ago, and the second about a month ago. In both cases, the light came on, and stayed on, for no apparent reason. There was no change in the driveability of the car. In the first round last year, I went through with the Saab dealer several of the possibilities that Mike mentions below. I made three or four visits to the dealer. The light finally went off (and stayed off for a year) after the dealer resoldered a wiring harness. When the problem recurred about a month ago, I took the car to an independent Saab mechanic that I had seen recommended in this news group. He told me the trouble code they were getting from the computer was a vacuum leak, but there was no leak that they could discover around the engine. So they said I should replace the gas cap, which, if defective, could have shown up on the computer as a vacuum leak. I told them that I had had the gas cap tested at an emissions-testing station last year, and there was no problem with it then. However, the mechanic said the testing station's standards weren't very high. So I replaced the gas cap. The light has stayed off in the month since then. However, I am not convinced that the gas cap was defective. Nor am I convinced that the problem is solved permanently. My tentative hypothesis is that temperamental check engine lights are a quirk of Saabs of this vintage. mike in NH wrote: > > This is a compiled list from other users here (some may be incorrect): > a SAAB ìCHECK ENGINE LIGHTî is an indication of poor combustion & emissions > caused by : > > A defective seal at the gas cap (fix or replace the gas cap) > Vacuum / In-take air leak (running too lean) ñ donít let this go on too > long > Using low octane fuel (use 93 octane gas for a month or so to clean > injectors) > Dirty throttle (clean or replace) > Faulty temperature sensor > Faulty O2 sensor > The engine oil is not of proper weight > The air and fuel mixture is to "rich" or "lean" (quite serious and would > require immediate attention) > > Or you may have a bad engine ground between the engine wiring harness and > the intake manifold: CARS AFFECTED: SAAB 900 From Vin # T2000184 & on. The > repair is as follows: > Step 1. Remove securing screws and washers for engine wiring harness grounds > at the intake manifold. > Step 2. Replace existing screws with longer screws part # 7978109 X 2 and > washer Part # 9166380 X 2 > > Mike > > "mudbiker" <arv-pe3nopsamne.no> wrote in message > news:objP9.4683$CG6.81601nopsam4.e.nsc.no... > > I am a lucky (until now) owner of a 94 900S. Few days ago I got the > "Check > > engine" warning light at the display . I went to my SAAB-dealer which had > my > > car in to check up this bug. But believe me or not they didn't get the > light > > to disappear and couldn't tell me what was wrong..!! They changed the > > thermostat, but the light is still on. Could it possible be a > > Christmas-light??? > > Anybody know what this warning is good for??? > > > > NORWAY (almost so far north u can go before u have to fight Polar-bears) > > :-) > > > > > >
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