SMOG

Last Year My Wife's 02 Pontiac Gp Failed An Emission Test Due To Code P0420 Which Means " Catalyst Below Threshold Bank 1. We Replaced The...

I Have Replaced 3 Catalytic Converters In 3 Years And I Still Can Not Pass Smog. I Keep Have The P0420 Code, Help

I Have A 1997 Honda Passport (3.2l, V6 Engine, 141,989 Miles), And It Has Failed Smog Due To (very) High Emissions, Specifically "hc"...

My 1988 Pickup Regular Cab Runs Like New, It Has 173k Miles, 4 Cylinders, 5 Speeds, Carburator. I Brought It To The Emission Test...

Just Purchased A 1978 Jeep Cj7, Odometer Reads 98,000 Miles Could Be More, 3speed, 252 I6. My Question Is The Previous Owner Lived In...

I Went To Take My Emissions Test Today And I Failed, On The Paper It States Trouble Code Po421, What Do I Need To Fix In Order To Pass...

Honda Recently Failed Emissions. First Test Failed Miserably. I Replaced Upstream O2, Pcv, Air Filter. Second Test Passed All But Co At Low...

I Am Interested In Buying This Truck From My Work, But The Problem Is It Wont Pass Smog The Engine Soon Light Is On And When I Took It Down...

My Honda 1990 Civic Lx 1.5 New Calitic Conv. New Ox Sen. Running Rich Wont Pass Smog Need Help What Do I Do Next? Whatsthe Prob.? Please...

I Have A 1997 Honda Odyssey, Took For A Smog Test And Check Engine Lite Was On. The Tech Said It Would Not Pass With Lite On. Checked The...