I just had the code P0420 come up with the SES light in my 2001 Maxima, and from some reading online it seems that there's a TSB to handle this. The problem is that my car has over 80k miles and the dealer told me that it would cost over $300 to service the TSB. Is that a reasonable charge or is there a way I can do this myself or for cheaper? Thanks, Dave
no its not, but you do not have a choice - only a dealer can reflash the ECU program (new program sets the trip point for this code higher).
You might be having some O2 sensor issues to...
Thanks for the info. Dave
The light actually just went off, so I think that it probably just needs the ECU reprogram to avoid these false alarms, but is there something that I can do to check the O2 Sensor or make sure that there isn't a real problem? Thanks, Dave
MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.