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Is my 2002 Nissan Altima Going To Fail the Smog Test?

I have a 2002 nissian altima. I was wondering if my Nissan Altima will pass smog check if I need to replace one of my fuel injectors and also I might have to replace my timing belt. Also I have a trouble code reader and I replaced my oxygen O2 senser and my check engine light turned off but on my trouble code reader it still shows the trouble code in memory. Will these things keep my Nissan Altima from passing the smog check. I want to pass the 1st time. Thanks.

Answer:

The problems you mention regarding your 2002 Nissan Altima's timing belt and fuel injector(s) may very well stop you from passing the smog check, due to high emissions. A sticking fuel injector may cause high or low CO emissions which in turn could cause either high NOx and/or high HC. Any one of these emissions, when above California's emission cutscores, will cause your Nissan Altima to fail the smog test. The check engine light problem is an automatic failure when the light is on, or when the trouble codes are stored in the ECU (engine control unit). If the check engine light turned off after you replaced the oxygen sensor(s) this means you corrected the fault which was causing the check engine light to illuminate however your Nissan Altima still need to conduct one or two more internal self-tests prior to removing the trouble code from the ECU. posted by SmogTips Support

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