p0420

Asked by Jan 11, 2014 at 10:00 PM about the 2001 Honda Civic LX

Question type: Maintenance & Repair

4 Answers

19,915

The catalytic converter is bad in exhaust and needs replaced. It is highly recommended to replace the o2 sensor at the same time.

112,075

http://www.obd-codes.com/p0420 --- check this out. Might find some of the info helpful.

355

Overall probably the biggest mistake vehicles owners make when they have a P0420 code is to simply replace an oxygen sensor (H02S). It is important to do proper diagnosis so you're not wasting money replacing parts unnecessarily. (BEST TAKE AWAY FROM DD'S LINK ABOVE)

19,915

Replacing the catalytic converter and o2 sensor is from Honda's technical website due to code p0420.

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