Question about 1994 Toyota Camry

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Failed Califonia Emission

Any ideas where to start or what to suspect as the problem?

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Check the exhaust this could be the main reason for the emission if the engine is not service properly this lead the same results, check the ignition ratio of your car.......................

Posted on Jun 09, 2008

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2002 VW Golf emission warning light was on. In garage yesterday for repair - part replaced. Light on again to day! Any ideas.


The shop failed to properly diagnose the OBD Codes
or verify the repairs

I would guess there was no road test following any work,
or any scan tool data looked at,on a road test, or driven
long enough to have all the Emission Monitors run

Should have kept it a day & done a better job

Oct 18, 2014 | 2001 Volkswagen Golf

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2004 porsche cayenne i reset computer and now it will not start


Clearing Codes, clears all data, then all the emission
monitors have to run again, or you won't be excepted
to inspection

Clearing codes & data,has nothing to do with diagnosing
why you got the fault codes & fixing the problems

How would clearing a dash light help pass inspection?

Before you got down the street two houses, the light would
be back,the car has a failed system ,thus the light on the
dash after the motor is started.

You cleared all data,now a shop can't even work on it
You removed all vehicle history & codes

Flat bed it to a shop & they will make the repairs you neglected
to do, while trying to get hundred miles before the parameters
on a failed system went out of range & the dash light came back

Need to study OBD 2 Systems on the internet & leave the vehicle
work to the pros

Apr 10, 2014 | 2004 Porsche Cayenne

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Emission failure on 2001 chevy blazer 4.3-


your vehicle has a vent valve solenoid located on the evap canister under the back end of the vehicle. You most likely have a bad vaccuum line going to the evap caniser. Have the vehicle smoke tested to verify. If no leaks are found replace the vent valve solenoid

Oct 25, 2012 | Chevrolet Blazer Cars & Trucks

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Failed an Emission test. Trouble codes: P0300 and P0305


if it has the brake lights as well for the ABS then i suspect a faulty computer ,end of story

Jun 09, 2012 | Lexus Cars & Trucks

1 Answer

My pontiac wont pass emission test


We can not help in any way ,until you give
us the emission numbers

You can not drive a vehicle for two years
or so between inspections & not work on it,
just before you go or you may fail

Who works on your car?

If you failed, I would suspect your aware that it
has issues for sometime,so we need a years
worth of vehicle history,& all we do is guess anyway,
based on what you provide

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code CODE PO455 fuel tank large leak.replace it .dont cost much.if that not it you have a evaporative leak.

Apr 10, 2009 | 1998 Volvo S70

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Failed emission test due to not complete code


Change thermostat and temp sensor....do another drive cycle....Plug your scanner back in and see if all the monitors are finished their tests...If not find out which monitor is still running...

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1 Answer

X reg vw golf, engine light constantly on


What happend before the check engine light came on?

Does your exhaust smell like rotten eggs?
If so, this is a faulty o2 sensor.
If not I woul suspect an emission component failed.
either way you need to have a scan tool applied to the car next time it comes on, then you will be able to tell better what it is you need to fix.

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1 Answer

I went for an emissions test today and it failed the mechanic said the car might be running too hot or too lean also notice the the heat gauge stays at cold when driving.HELP


I suspect you need a new thermostat. It should be running at 195 degrees F.

If the engine does not fully warm up, the engine can not go into emission control mode.

The engine temperature sensor sends a signal to the engine/emissions computer that the engine is now at normal operating temp. The computer then starts controlling fuel flow, EGR, etc. so that emissions are being controlled.

When the enigne is cold, you are in what we call "open loop" meaning no emission control.

Get the thermostat installed first. Make sure it's the same temp rating as the one that's in there. Either 180 degrees or 195 degrees.

Then you should pass.

Mar 03, 2009 | 1997 Volkswagen Jetta

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