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Additional info Posted by Ari [Email] ![]() ![]() In Reply to: Re: check engine light on 1990 Saab 9000, 2.3 nonturbo, Gene N ![]() ![]() |
Follow the link Abusot provides and read out the codes for free.
It's important to report back with the fault codes, and not to simply buy parts based on the codes. The codes are indicators of what is wrong, they aren't perfect at isolating the fault to one part.
As an example, it's very common to get an O2 sensor fault. The first impression is to replace the O2 sensor. Yet you'll get that fault if you have a vacuum leak, or a bad fuel pressure regulator.
Even before reading out the codes, do a visual check of the engine compartment. See and hoses dangling? Any nipples that look like a hose belongs there? Check cables - any that have fallen off, or been chewed through by mice?
A simple rotted vacuum hose can cause a mixture failure and a CEL
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