Question about 2001 Honda Accord

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Problema con el codigo p0420

Motor 2.3lt ulev v-tec

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P0420 - Catalyst System Low Efficiency

Posted on Oct 29, 2008

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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Mauricio Vasquez


Here are some possible causes.

Air leaks at the exhaust manifold or in the exhaust pipes.
Catalytic converter damaged or has failed (deteriorated).
Front O2 Sensor older (aged) than the rear O2 Sensor (O2 is lazy).
Front O2 or rear O2 is contaminated with fuel or moisture.

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92 honda civic wire 4 vtec


hi, i am sorry to tell you that your motor can't support v tec , and i advise you not to try , and thank you for using fixya

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