Question about 2002 Toyota Sienna

3 Answers

ASM 2525 NO ppm TAILPIPE EMISSIONS failure

Toyota Sienna SE yr. 2000 3.0 L, 6cyl. fails emissions ASM2525 test.
FAILS NO ppm limit = 578, Reading = 2555
Passes HC ppm limit = 52, Reading = 17
Passes CO% limit = 0.29, Reading = 0.00
Passes curb idle HC ppm limit = 150, Reading = 13
Passes curb idle CO% limit = 0.70, Reading = 0.00
What are the possible causes?

Posted by on

  • 8 more comments 
  • felixc80 Nov 24, 2008

    The check engine light is staying on, the mileage is 58000 km

  • felixc80 Nov 24, 2008

    I have subsequently added 25 liters of premium gasoline and checked that the gas cap was put on properly.
    The engine light went off. I do not know if the engine codes were checked but the shop that did the emissions test followed with an emissions diagnosis report that stated I needed to have the throttle body service, clean the EGR valve, fuel injection service, tune up the engine and replace the spark plugs.
    Prior to adding gas I did check the gas cap but the engine light still stayed on as I drove to the gas station. I plan on taking it to a different shop to have this issue looked at and repeat the test.

    What is your opinion?

  • paul erickson
    paul erickson May 11, 2010

    this is very odd

    do you have a check engine light on?

    does it seem to running right

    is your fuel millage bad?

  • thomas flynn Aug 28, 2013

    no check engine light on runs a bit rough at idle idle changes

  • thomas flynn Aug 28, 2013

    no check engine light

  • thomas flynn Aug 28, 2013

    fuel mileage isnt the best

  • thomas flynn Aug 28, 2013

    also hc(ppm)min 99 max 208 at 15 mph at 25 mph 55 max196

  • Anonymous Mar 12, 2014

    2500 rpm the hc(ppm) was 505 and on idle was 396 and for co(%) on idle was 4.0 what caused that

  • Anonymous Mar 14, 2014

    Hc ppm problem fix

  • Anonymous Mar 31, 2014

    to hi the hc ppm

×

3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Guru:

    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 674 Answers

Have you had the the engine codes pulled and reset?
and if so what are your engine codes?
i dont know of any car that will pass emissions test with the engine light on.
we cure your trouble that caused your engine light to come on and you will pass your test.
later
paul

Posted on Nov 24, 2008

  • paul erickson
    paul erickson Nov 24, 2008

    it just looks like to me that they think you need a tuneup.

    but with your check engine light off it should be running clean

×

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Need to know how May fuel sensors are on a 1994 olds cutless sl v6

Posted on Dec 17, 2013

  • Virginia gentile
    Virginia gentile Dec 17, 2013

    Need to know how May fuel sensors are on a 1994 olds cutless sl v6

×

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have a 94 Tbird with a reading of 790 NO ppm at 1871 RPM, I put about a liter of water into the intake at about 2000 RPM and changed vacum lines to EGR valve,(may have been cracked), now the reading is only 214 NOppm at 1348 RPM. This much change I don't understand. Maybe this info may help someone.

Posted on Sep 17, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

My 1997 Honda Civic failed it's Emissions Test. See below the ASM Emission Test Results. What do you suggest I do to get the car to pass the smog test? ASM Emission Test Results: 15mph - RPM = 1587...


Jose, I don't know if this will give you the answer you are looking for because there are many things to consider here. The exhaust gas recirculation valve (EGR) is one of the main things involved in reducing NO emissions. This valve is controled by the power control module. (PCM) This is your vehicles computer. The PCM monitors the vehicles speed and will command the EGR to open when the vehicle attains a certain speed, which is why the ASM test being done is recorded at two different speeds. At 25 MPH your vehicle failed the hydrocarbon (HC) emissions limit and this could be for a number of reasons. When is the last time you car was tuned up? Old spark plugs, wires, clogged air filters, oxygen sensors, leaking injectors (personal experience) or the PCV valve could be contributing to the results of the test. I guess that the easiest way to go is to tune up the engine replacing the spark plugs, wires, air filter and the PCV valve and don't forget to have the oil changed at the same time. Only then should have the vehicle retested and see what the results are. Should it fail again you may have to consider having the EGR or the catalytic converter replaced depending on what portion of the test fails. If the NO fails I would consider the EGR. If the HC fails then I would consider the catalytic converter. Good luck with this.

Apr 05, 2011 | 1997 Honda Civic

1 Answer

1991 toyota camry 4 yl auto 357,000 k's ASM2525 test HCppm limit 66 ppm reading 68 ppm any ideas on quick inexpensive fix Thanks Peter


Wow the kms are getting up there!
Make sure that the spark plugs are not worn and the gaps are correct.
Check the air filter for dust and clogged up with oil etc.Only clean with compressed air,blowing in reverse to dislodge the dust.If too dusty or is an oily dirt,replace the air filter.
Has the oil has been replaced in the last 10,000km.If not change it.
Put a quality fuel cleaner in the fuel tank prior to filling up.
Check that the thermostat runs the engine in the correct area on the temp gauge.too cold will cause the injectors to supply a richer mix.
Clean the PCV(positive crankcase ventilator)valve.
Perhaps clean the air mass?flow meter with a cleaner like CRC sensor or MAF cleaner.(it is the unit near the air cleaner housing that has a multiwire plug on it)If not there,clean the throttle body with a good carby cleaner.
Some worn engines put out a better test when warm,not cold or too long running.
Don't leave it idling for a long time while in test queue,shut it down and wait your turn.
I hope this helps you pass.

Apr 02, 2011 | 2002 Toyota Sienna

1 Answer

1993 S10 Chevrolet Blazer DID NOT PASS THE EMISSIONS TEST FAIL HYDROCARBONS, CARBON MONOXIDE passed NO ppm limit 1500 ,reading 0 , failed CO%limit 0.50 reading 0.84, failed HC ppm limit 90, reading...


what about the air filter is it clean ,silly question i know but you would be surprissed ,does this vehicle have one O2 sensor or two one after the cat as well or is it too old for two O2 sensors ,i know most europeon market vehicles didnt have cats till 1992 and most didnt have two sensors till around 2000 ,also check the two white or two black wires on sensor for 12v these are the heater feed wires for the sensors

Jan 03, 2011 | Chevrolet S 10 Cars & Trucks

1 Answer

Asm test NOx (ppm) 1842 limit, 2259 emissions failed


any check engine lights on sounds like a oxygen sensor

Dec 09, 2010 | 1995 Saturn Sl

1 Answer

93 civic failing emissions test... tested 3 times, replaced plugs, wires, o2 sensor, catalytic, and retarded the timing slightly...passes curb idle...fails all 3 on ASM2525


check for any vacuum leaks, run some injector and combustion cleaner through it, check the pcv valve and the egr valve, and fresh oil, can't think of anything else

Nov 17, 2010 | 1993 Honda Civic 4 Door

1 Answer

Failed emissions test.is int.manifold gasket set replacment & plenum o ring & gasket necessary.co% limit .70,was .82;hc ppm limit 150,was151.


Does it have a vacuum leak? If it was that bad it should have thrown a code. That being said the first thing I do with a vehicle that fails emissions is to replace the o2 sensor. o2 sensors start wearing out the day they are put in. Generally I like to replace mine once a year though I know that is a bit of overkill. It does make sure the system is running topnotch. keep in mind my vehicle only has one o2 sensor.

May 27, 2010 | 1999 Chevrolet Blazer

2 Answers

What is the emission controlls evarorative system


Emission control systems have been incorporated into automobiles to prevent pollution by limiting the amount of partially burned and evaporated gases into the atmosphere. These systems have been efficient in reducing the pollution caused by automobiles to a large extent. Automobiles were first manufactured with exhaust emissions control systems in 1966. Since then technology has undergone several changes that has increased the number of cars which use this technology. The emission released is calculated by quantity released per distance traveled. The types of emissions are tailpipe emissions, life cycle emissions and evaporative fuel emissions.
Catalytic Converter
The catalytic converter was developed in the early 70's when severe air pollution was emanate, but wasn't made mandatory by the US government until 1976. The catalytic converter or "cat" for short is one of your vehicles main emission control devices. The name was derived from the operation the catalytic converter performs, it takes a catalyst and converts the unburned gases to burned gases, "catalytic converter".
EGR Valve
EGR valves are used is to lower KNOX (NO2) gases which occur when the combustion chamber when temperature reaches over 3,500 degrees Fahrenheit. KNOX gases have proven to cause brain damage and have been mandatory on most vehicles since 1976. An EGR (exhaust gas re-circulation) this valve controls exhaust gases to enter the intake manifold and flow into the combustion chamber at certain times in the operation of the vehicle. To test your EGR valve remove the vacuum line that is connected to the valve, apply vacuum using a vacuum pump to the valve while the engine is running. If the engine stalls the EGR system is working, if not, the EGR valve may have failed.
Tailpipe emissions are released as bi-products of spent fuel that is combusted inside the cylinders of the engine. These omitted gases consist of carbon monoxide, hydrocarbons, carbon dioxide and nitrogen oxides. To control tailpipe emissions measures have been taken to increasing engine efficiency. This efficiency involves technologies such as lightweight vehicle design, regenerative braking, decreased rolling resistance, increased ignition voltage, minimizing air resistance and improving power train efficiency.


Lifecycle emissions are products which are released during the manufacturing, maintenance and disposal of the vehicle. The products include volatile solvents such as auto paint and lubricants, manufacturing plant power waste, oil filter and oil changes, heavy metals, tires, landfills, etc. These kinds of emissions are responsible for creating urban smog which consists of heavy molecular gases which pollute our environment.

Temperature change can result in the evaporation of fuel in the tank because of the development of pressure, this is known as gas tank venting. Recently fuel systems have been equipped with a closed system called EVAP, this allows the vapor to be stored in a charcoal canister until it can condense into a liquid and then returned to the fuel tank.

Another emission control system known as the air injection reactor or AIR, oxygen is injected in the exhaust manifold. This system decreases the bi-products of incomplete fuel consumption.


If the emission control system malfunctions the "check engine" light will illuminate. Scan the PCM for trouble codes, repair the problem, then clear codes to re-test system. Most automobile's have an emission system information label under the hood, or consult a repair manual.

The emission system performs regular test while the car is in use called a "test cycle". Tailpipe emission are measured in parts per million or PPM. Presently, the limit for evaporated gases is two grams of HC per hour, which is about one liter per month. At first, the idle test, which was a two-speed test was conducted in the 1980s. Then it was substituted by the dynamometer test in the late 90's, in the accelerated simulated mode or ASM three gases are tested. Various states and countries have developed unique laws about pollution testing of vehicles.

Good luck, and remember rated this help.

Mar 16, 2010 | 2003 Chevrolet S-10

1 Answer

94 corolla failed va emissions. hc ppm 15 mph limit: 153 reading 155. how can i get this to pass


get the air fuel mixture leaned off as youre so close it should work any decent mechanic can do it and its easy

Nov 03, 2009 | 1994 Toyota Corolla

1 Answer

FAILED EMISSIONS


possible but could be head gasket or valves , or worn rings and is by passing the pistons going straight out the end ...or maby settings are wrong ? try carb cleaner and inspect visually air-filter etc.

Aug 26, 2009 | 1986 Ford Mustang

1 Answer

Toyota Camry - 1998 3.0 L V6 = Failed emissions - High HC ppm at 40KM/h. 105 reading (limit is 57) What would be some of the causes for such a high reading?


Burning oil...Engine miss. lazy o2 sensor.. dirty maf sensor. check the data on a scanner and this will tell what is amiss.

Jul 12, 2009 | 1998 Toyota Camry

Not finding what you are looking for?
2002 Toyota Sienna Logo

2,107 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

61168 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...