My 900 2.0 turbo failed emissions test yesterday. I was just at the allowed level for HC and a little over on NOx, way under for CO. The guy at the shop that did the test said it may be a bad cat (car has 112k miles).
From reading the forums, it seems high NOx can be caused by high combustion chamber temps which is an indicator of faulty egr system. my question is, doed the 2.0 even have an egr system? I cant seem to find any info relating to an egr valve on a 2.0. If this is the case, what else should I check for before i go replacing the cat?
I did find that the vac line from the pcv check valve was disconnected from the throttle body. Could it be as simple as that? I know a loose vac line is a prime candidate for emissions problems, but I guess I feel that was too easy a fix and there must be something else wrong. any thoughts?
From reading the forums, it seems high NOx can be caused by high combustion chamber temps which is an indicator of faulty egr system. my question is, doed the 2.0 even have an egr system? I cant seem to find any info relating to an egr valve on a 2.0. If this is the case, what else should I check for before i go replacing the cat?
I did find that the vac line from the pcv check valve was disconnected from the throttle body. Could it be as simple as that? I know a loose vac line is a prime candidate for emissions problems, but I guess I feel that was too easy a fix and there must be something else wrong. any thoughts?