Matching You with a Pre-Screened Smog Check Center You will Love
Free Online Smog Check Diagnosis
$500 Free Consumer Repair Assistance
Failed Emissions Test
How to Pass the Test
Who Else Wants To Pass the Smog Check
Miles: 
Which Type Should I Choose?
 
            
    Forum > Failed Smog Test > Question

Join the community and post your questions. Ask-A-Tech right now!
 
 



Failed Smog Test
 

2002 BMW 325CI Check Engine Light is On

My BMW 325CI's emission passes but it fails the smog check because the check engine light is on. What can be the problem?




Answer:  

Your BMW's check engine light being illuminated is an automatically smog check failure. Vehicle manufacturers have placed the Check Engine light inside the passenger compartment to inform the driver there has been or is an engine or drive train malfunction. Very often you may not notice an engine problem, but this is only because your engine's computer is operating under pre-programmed information rather then of real-time.

Our recommendation is to have a certified smog check repair shop inspect your BMW. Along with the "Check Engine" light being illuminated, there are stored computer codes in your BMW's ECU (engine control unit) which the smog station will be able to retrieve and use for diagnosing purposes. These codes more then often will direct the smog technician in finding the fault. Once the fault/s (trouble codes) are found the repair shop can begin correcting the faults.


posted by SmogTips Support 06-26-2013 12:13 PM


Related questions and answers you might find useful:

2000 Mercedes Benz slk230 Kompressor, I took it to get a Star Smog. I disconnected the battery So Now The Computter Will Not Reset On This Vehicle. I have Tookin It To 3 Smog Shops And Have been charged. but no help. by Sara on 10-21-2017 12:55 AM

Will a p0401 "egr insufficient flow" code cause my 2004 f350 6.0 powerstroke to fail a california smog check even if there is no check engine light? by Eric on 10-20-2017 02:28 PM

2001 Oldsmobile Alero Dashboard Lights On Sometimes by jr on 10-16-2017 12:01 PM

What Are The Reasons My Nissan Altima Has High NOx? by Albert on 10-13-2017 03:48 PM

OBD Trouble Code P0741 Torque Converter Clutch Circuit Problem by al on 10-08-2017 03:09 PM