Question about 2002 Toyota Sienna

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White smoke ,very heavy van hesitates when smoke appears

Catalic converter needs replacing oxygen senser needs replacing

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Does the smoke dissipate very quickly or floats around like its burning rich smells like fumes? this will help me diagnose your vehicle's problem i'm currently working on the same van at my shop and i will guide you step by step on resolving your car problem my is rooster

Posted on Jul 18, 2013


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What causes the van to smoke it sounds like the exhaust brake is leaking

head gasket leaking antifreeze into cylinders makes them smoke white smell the exhaust and if it smells sickly sweet get it looked into . never heard of an exhaust brake .

Nov 23, 2015 | Cars & Trucks

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On the 2004 honda crv along with code 1259vtec, l also have code 0420 which deal with the oxygen. If I upgrade the gas and put in lucas fuel injection cleaner, is it possible to correct the condition

NO--- code p0420 refers to the catalic converter system, bank 1 --efficiency below threshold===causes --cat converter, wiring-HO2S sensor 2
code p1159 refers to heated oxygen sensor (HO2S) -front circuit low voltage positive terminal===causes--wiring--HO2S--ECM programming---ECm

In both codes the heated oxygen sensor is mentioned so I would have it replaced before I spent money on a cat converter.

Feb 09, 2015 | 2004 Honda CR-V

1 Answer

Loss of power, hesitation, bad gas mileage

Clean the MAF sensor. Could also need a tune up, plugs, wires, cap, rotor, fuel filter. Could also have a stopped up catalic converter that needs to be replaced.

Dec 01, 2013 | 1989 Nissan Stanza

1 Answer

Smokes when idling

general rule of thumb, metal expands when warm, Blue smoke is oil, white smoke is either A: water in your exhaust, B: excessive fuel
If you have white whispy smoke any time you idle, i would be checking your catalic converter, If you have blue smoke on idle at the time of start till your motor warms up id suggest it would be one or more piston rings with slight wear (normally first sign of serious wear) generally you can tell oil smoke by the colour and the smell. it will smell rather burnt and will be obnoxious. if it is white then its more than likely "steam" and of course carbon monoxide, so it should generally disapate very quickly. which is usually ur catalic converter or in some cases more serious the first sign of a blown head gasket as you get coolant (or anti-freeze) leaking into the combustion chamber. that can be pressure tested by ur local mechanic.
I hope this has helped cheers

Jan 11, 2011 | 1999 Dodge Ram

3 Answers

Can a bad downstream oxygen sensor cause a rough idle on a 2003 chevy venture

no, the downstream sensors do not feedback into the control of the engine--they only detect the effectiveness of the catalytic converters. If the sensor is detecting excess fuel, the problem could be with your fuel pressure regulator, and that would also explain the rough idle. Do you have a trouble code you can pass to me?

Dec 12, 2010 | 2003 Chevrolet Venture Passanger

1 Answer

CHK ENGINE light on. told is OXY Sensor. Where & can replace myself?

the o2 senser is located in between the the engine and the catalic converter can just unscrew and replace but b4 u do dip the tip in vinegar and c if that works just cleans it thats all kk hope that helps

Jun 30, 2009 | 2003 Toyota Tacoma

1 Answer

White smoke from exhaust and smell gas fumes

A plugged catalytic converter can set codes, but I think we need to concentrate on smoke right now. That's not saying that the converter wasn't a partial, or the cause of the white smoke. Has your oil level or coolant level been going down, or up recently, since this all started ?
You say he cleaned all the insides of the catalytic converter out, so there is no blockage there now, correct? Did you erase the code when you replaced the oxygen sensor, and it came back again? Finally, if you have white smoke rolling out your exhaust, it is usually caused by oil or coolant consumption getting into the cylinder, which could also be causing oxygen sensor to foul up & cause a code. I'd concentrate on finding the cause of the white smoke first. Cooling system pressure test, engine compression check should tell you , but so should consumption of oil or coolant increase. If the problem originated at the converter (plugged) it may have caused a blown head gasket for one thing. I'll wait for your reply.

May 09, 2009 | 1991 Honda Prelude

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