Question about 1995 Toyota Camry

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I recently had my 1995 toyota camry fail emissions test because of high co%. I have a clean air filter, new oil spark plugs have about 25000 miles use and I replaced the O2 sensor. What else might cause this?

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  • Toyota Ed May 11, 2010

    A high CO percentage indicates unburned fuel.

    This is an indication of a timing issue.

    Your timing belt really needs to be changed.

    Get it changed,and then have it retested,

    Let me know how it works out.

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  • 1,201 Answers

Well, if you have the 6 cylinder, there are 3 02 sensors in that car.
One on front manifold, one on back manifold, and one in the center pipe.You changed one, good idea to change the other 2. That is if you have the 6 cyl.

Posted on Jan 27, 2009

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Change spark plugs,wires,cap and rotor if they are over 24,000 miles
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Make the smog check appointment for the EARLY MORNING. Colder air will help the fuel burn better.

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Clean or change the air filter and pcv valve.

Clean Mass Air Flow sensor with CRC Mass Air flow cleaner or electronic part cleaner.

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Do a quick wipe down on the wires and cap to take the moisture off.

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Check spark plug wire contacts for corrosion.

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Fill the tank to around 3/4.......just in case your fuel pump is weak.

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Please post more information on the comment window.

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