2000 Mazda MX-5 Miata "po421 check engine code" Questions

...check engine light comes on. Code PO420 Had local auto parts store scan code and they came up with PO420. I just bought this car. Seem to run good. Have the 2000 Miata had any problem areas that you ...

...check the code # po421, this code is that the computer sees that the cat converters are taking to long to warm up, code po 431 is also the same as po421, this code is related to the thermostant and ...

...check because of the PO421 code. What do I need to do to solve this issue? the trouble code means that the oxygen sensor is reading that your catalytic converter is no longer operating properly. ...

...PO421 Catalyst system bank 1 taken from: http://forums.evolutionm.net/lancer-troubleshooting/349095-code-p0421-call-mitsu-before-you-do-anything.html Code P0421- Call Mitsu before you do anything! I ...

check engine stays on constantly.I have a PO421 code.Could this be an oxygen sensor? A code P0421 may mean that one or more of the following has happened: The catalytic converter is no longer ...

...PO421. Hi Please check the link to get a detailed idea about the code:- http://www.obd-codes.com/p0421 Please get back to us if you have further query else please accept the suggestion. Thank you for ...

...po421 and p0300. Check Engine light is always on and flashing at times. Loses power at times when I am driving. Recently car will not start right away after driving it. Then it will start after ...

...check engine light on. Dealer says code P0420. is diagnosed. inefficient catalytic converter. Need to change it. No funds left, what can i do. IF IT RUNS OK DONT DO ANY THING Here is some great info ...

check engine light is on i got a front light out autozone said (po421 code )warm up catalyst below threshold Basically this means that the oxygen sensor downstream of the catalytic converter on bank 1

PO421 code is on again. Checked for exhaust leaks and vacuum leaks. Flushed the injectors. Next is checking the MAF sensor for dirt and replacing ignition coils. What else could we be missing? P0421..