2001 Nissan Sentra "miles reset code p0420" Questions

...reset the computer and traveled from NC to FL (1000 miles aprox). After that I drove in Florida about 300 miles and then the light went on again. What could be the problem?. You will need a new ...

miles to reset the computer? Help!!! 200 miles is more than enough. p0420 is a cat code meaning the cat in the exhaust is not doing its job. you need to make sure there are no exhaust leaks before the

...miles but I am sure when the OBD resets the P0420 code will be back. Dealerships around here have told me the catalytic converter needs replacing but they all want over $1200. That seems insane even ...

...miles. After having catalytic converters replaced the engine light returned. Had both O2 sensors replaced and engine light was extinguished for one day then it returned. Previous code was P0420 ...

...reset the check engine and it came back on with in 30 miles same code po420 I think you got misinformed about what fault P0420 is, the GM manual says this: "P0420 - Catalyst System Low Efficiency" ...

miles and seems to be running fine. What is the deal? go to autozone they will scan it no charge and do reset, give u possible causes and repairs, are u sure its not the oil change interval light,your

...MILES. I HAVE REPLACED EGR VALVE .STILL WA\ONT PASS INSPECTION. WHATS NEXT? P0401 indicates that the Exhaust Gas Recirculation Flow Insufficient Detected. This can be because EGR is faulty . As you ...

...miles, reset P0420&P0430 and MAF cleaned. Sept 2009, 127K miles, P0420&P0430 codes appeared. Nov.2009, 131K miles, dealership analyzed problem and could find no reason. They contacted Tech ...

reset the car computer to check if it comes back and it did after nearly 100 miles. second try at autozone gave p0420 but the guy looking at it is was not confident at all. in both cases the pcode did

...reset?? are you talking about drive cycles not completing?? you tring to pass emissions? some veh will take up to 500 miles!! to go through all drive cyles ..or are you actually talking about a evap ...