1999 Chrysler Town & Country "po420" Questions

po420 P0420 Catalyst System Efficiency Below Threshold (Bank 1) check this put http://www.obd-codes.com/p0420 This code indicates your catalytic converter is no longer working.Needs to be replaced.

p0420. p1734 p0306 Problem po420 O2 sensor and catalytic con.,po306 coil #6 problem.

What could be wrong PO420 catalyst efficiency below threshold There is a code PO420 catalyst below threshold now appearing with the engine light on. We have the plugs replaced when misfire code came. ...

2000 chev malibu is reading a po420 po420--- catalist efficiency below threshold--- possible fix. a po420 means that one or more of the following has happened. the easiest thing to do, is erase code ...

i have a 1997 chevy lumina. i had 2 coded before, po420 and po401. i changed the egr valve, and now the po420 is gone. i just replaced the egr tube, cleared the codes, and now the po401 is back. car ...

2000 corolla with trouble code po420 I have a 2000 corolla. it had the check engine light on, and trouble code "po420". i was using unleaded fuel 89. after the check engine light was triggered, i ...

Nissan Sentra 2000 PO420. Can you please tell me what the problem could be? We changed the back cat today and the PO420 still is showing up. Please advise ? Thanks Donna Intake manifold leak

check engine light is on i have a 98 honda accord trying to find out what these codes are, po420,po401,p1456 Go to google & type in ---OBD2 Codes 1998 honda accord PO420 etc

1997 toyota camry check engine light on,code po440,po420,po441, these 3 codes are the ones scanner brings up,po440,po441,po420 P0420 is catalyst system efficiency below threshold (bank 1) P0440 is ...

I have a diagnostic trouble codes p1768,po300,and a po420. what does this mean? I have tow of the three requested codes. po300 is misfire detected at multiple cylinders. See po301-306 represent the ...