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Old 12 Apr 2012, 10:48 pm
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Default 2000 honda odyssey check engine light?

i have replaced the egr valve and the catalyc converter about 3 times each and had a blockage near the egr valve cleared and i still get the converter and egr valve code over and over again

sorry ive already replaced the oxygen sensors already
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Old 12 Apr 2012, 11:01 pm
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what about the oxygen sensors.
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Old 12 Apr 2012, 11:26 pm
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Your problem never was the EGR. Just ignore those codes.

Your problem is the MAF sensor is faulty. The MAF sensor(located in the air intake chamber) does not have a fault code of its own, so when the heated wires in the MAF sensor goes bad it notifies you through another one of the components (MAP, or EGR, or O2).

Its confusing, because everyone immediately looks at the sensor that is throwing the code as being the one at fault...but its not, its the MAF sensor. Its fluctuating and sending bad messages to the MAP. Its telling the MAP to allow "too much/too little" oxygen to get to the motor; "more/less" than the motor needs. And in turn the MAP is trying to over-compensate for the "more/less" air by sending messages to the EGR to open and close the valve and let oxygen starved exhaust fumes in to even out the burn ratio.

And the messages are telling the EGR to "open/close" so fast that it confuses the EGR system and it freezes, it locks up, just like computers do, ...OR, the valve gets stuck and that in turn, turns the Check Engine Light on.

Replace the MAF sensor. And disconnect the battery for 10 minutes and let the computers memory dump.
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Old 12 Apr 2012, 11:35 pm
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First of all check whether you have replaced the fuel cap tightly, it sometimes comes on due to the loss in pressure in the fuel tank. if that doesn't solve it then take it to a good garage, they'll hook it up to a computer and tell you the problem, check engine light doesn't always means emission problems, it also shows any other problem with your car's electrical system
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