Question about 2003 Mercedes-Benz CLK-Class

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Failed emmission test, saying it is misfiring, and problems with the ultra censors

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  • illestaries May 11, 2010

    WHAT KIND OD CAR WHAT KIND OF SENSOR ?

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You need to have your plugs and wires replaced.

Posted on May 01, 2009

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Why I failed emmissions test 3 times


what is your question?
I failed emmissions test once too, and it turned out to be a bad gas cap!!! $30 for a new one.. Yes, it was a Kia too.. Sephia.

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1994 chevy s-10 6 cyl 4.3l automatic starts and runs rough till it gets warmed up?


ALL SENSORS GO BACK TO THE ECM(COMPUTER), THE OXYGEN SENSOR IS EXTREMELY IMPORTANT, TELLS COMPUTER CHANGE OR ADJUST FUEL DELIVERY, AMONG OTHER THINGS, FIX THAT PROBLEM, PROPERLY, THEN U CAN MOVE ON. NEW AIR AND FUEL FILTERS FOR SURE ! IS BATTERY FULLY CHARGED ? THE GAS WE BUY IS GARBAGE, ETHENOL IS KILLING OUR ENGINES, ADD SOME PREMIUM FUEL, NEXT FILLUP, ADD STABIL 360 FUEL STABILIZER TO TANK, ARE YUR SPARK PLUGS AND WIRES IN GOOD CONDITION ? TUNE-UPS DO HELP. FUEL INJECTORS IF THATS WHAT U HAVE, GET DIRTY, CLOGGED, NEED CLEANER ADDED TO TANK, OIL CHANGE ALSO HELPS, GOTTA GET ENGINE RIGHT, AS U WOULD FOR INSPECTION. OR YOU'LL FAIL EMMISSIONS TEST, RIGHT ? GOOD LUCK MY FRIEND

Apr 29, 2014 | 1994 Chevrolet S-10

1 Answer

Failed emmissions codes 0400-0443-0300


P0300 Random Misfire, means any cylinder at anytime.

P0400 Exhaust Gas Recirculation Flow. EGR passages are full of carbon
clean passages and misfires may go away

P0443 Evaporative Emission Purge Control Valve circuit.

now just because a code is present doesn't mean a part/sensor is bad, just where to look and to test.

Oct 10, 2012 | 2001 Nissan Maxima

1 Answer

High Nox levels on emmission test


here are the possible causes of high nox levels, Misfire condition
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Failed oxygen sensor
Leak in exhaust tubing upstream of converter
Excessive carbon deposits in combustion chamber
Improper spark advance
Blocked coolant passage
Overly lean air-fuel mixture
Damaged cold air duct
Failed or malfunctioning catalytic converter
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Apr 29, 2011 | 1995 Mercury Tracer

3 Answers

I have a 1997 Bravada that has a bad oxygen censor and a bad caytalytic converter. Would both of these problems cause a misfire, and , wich sensor is in bank 2


Yes they can surely cause an misfire.

I cannot understand your statement "wich sensor is in bank 2"

If i am not wrong you are asking which sensor is present in bank 2 .

The 4th O2 sensor is located in bank 2

Mar 22, 2011 | 1997 Oldsmobile Bravada

3 Answers

I have a 97 Ford Explorer AWD 8 cylinder. Check engine light comes on and I get code p303. Vehicle bucks at times, uses lots of gas. Believe it may be 02 censor, spark plugs and wires tested ok. Any Idea


code says #3 cylinder misfire, check the coil pack for this cylinder to see if its got spark, bad o2 sensor will spit another code, its most likely the coil

Mar 17, 2011 | 1997 Ford Explorer AWD

1 Answer

Car passes emmission test but fails due to codes in computer


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Mar 16, 2009 | 1996 Chevrolet Cavalier

1 Answer

O2 sensor 1996 volvo fail emission test


If you have trouble codes stored in your cars computer for O2 sensors a fuse will not fix it. One or all of the O2's may need to be replaced. There are test that can be done to confirm which one.

Jan 28, 2009 | 1996 Volvo 850

2 Answers

Possible o2 sensor 2002 GMC Onvoy


O2 sensors indicate unburned oxygen in the exhaust sysytem. Bad O2 sensors causes fuel mixture to run rich. It causes fuel consumption and your emmissions test will not pass. Check for vacuum leaks check the manifold.check for a misfiring cylinder, a burned exhaust valve that is leaking compression. replace the O2 sensor or sensors. Some cars have 2 . One for the intake another for the out take. If it reads a code for the Map sensor along with the O2. It is better ifyou replace both sensors. But I think that the problem lies in the oxygen sensor or sensors. Pleae vote my answer if this helps.

Jan 15, 2009 | 2002 GMC Envoy

1 Answer

FAILED EMMISSIONS


Hello what you need to do is throw a fresh set off plugs in the motor go to your parts store ask to buy a bottle off emmission pass follow the instructions you should be okay goodluck please rate

Aug 28, 2008 | 1998 Nissan 200SX

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