Questions & Answers for: fail emissions lean

...emissions twice. Spark plugs and wires replaced, and front engine mounts. Oil change done with best oil to make sure that wasn't contributing. Help??? High NOX readings indicate a somewhat lean ...

1996 jimmy failed an emission test My 1996 jimmy failed an emission test with extremely high nox numbers, it also failed on hc an co but not by much. The truck seems to be running lean, also lacks ...

...emissions hoses? A vacuum leak causes a "too lean" reading. If no leaks, you could have a malfunctioning emissions valve, bad oxygen sensor or fuel injection problem. First I would remove the spark ...

emissions test running lean It's really impossible to diagnose something like this. You're running lean...so? You could have a bad o2 sensor reading the exhaust stream wrong and commanding the

...emissions in colorado for Nox levels too high the limit was 1.5 and mine were 1.9 i did have some hose replaced by the deaership they said it would fix this but it didnt make a difference. Are there ...

failed emissions test skoda fad DEPENDING ON WHAT PORTION FAILED IT COULD BE MANY THINGS. HC, NOX, CO? IT COULD BE TOO RICH, TOO LEAN, TOO HOT, TO COOL.WHAT FAILED?

...high n.o what emmision component would cause this car to fail it passed co&hydro Lean Fuel Mixture Defective EGR System Defective Catalytic Converter (CAT) High Engine Mileage Engine ...

...emissions test due to exhaust recirculation flow excessive and system too lean bank 1 i just purchased the vehicle and its the third time it has failed emissions. what happens now? It sounds like it ...

...that failed emissions testing. RPM at 928. The MIL CMD failed. Readiness 1. DTC1=P1131 code. What does this mean? P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. ...

...emissions Thanks Ken, The tests failed were : - Po171 P0300 P0340 P1300 Gilbert Long P0171 : System Too Lean (Bank 1), P0300 : Random/Multiple Cylinder Misfire Detected, P0340 : Camshaft Position ...