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Failed Ca Smog - Gross Polluter!


silvr

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I recently had a smog done on a 1998 ES300.

15MPH

RPM 1784

%CO2 9.2

HC MAX51 Measured 647!!

CO(%) MAX .48 Measured 8.84!

NO Max 419 Measured 45

25MPH

HC MAX 35 Measured 679!!!

CO MAX .46 Measured 9.04!!

NO MAX 706 Measured 39

Any ideas on what is causing the problem?

Bad oxygen sensor maybe?

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could be anything, but a bad oxygen sensor shouldn't give you 10x the limits. could be the muffler/exhaust system, internal engine oil leak, coolant getting into the engine or oxygen sensor?

did the technician give you any hints? sometimes they try to fix it for you and make $$ and hope you pass the test again

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