Okay, this is starting to get old. I just bought my (seemingly perfect) '04 G35 Sedan last month (declined a warranty). As SOON as I paid for it, the airbag light came on. The mechanic at the used car place fixed it (presumably.) Then my husband reversed coils when changing the plugs. Took it around the block (mini-misfired once). Back to our garage. Realized his error next day and fixed it. Code for that came on, had it cleared three times, never came on again (as I recall). Hubster replaced engine air filter (oiled it, like he always has done with no problems on his Nissan Sentra). Then code 0430 came on. Same mechanic kindly took a look at and said he'd order an O2 sensor. Would be about 4 days. I called after 7, and they said "we'll CALL you when it gets here!" Has now been 2 weeks. Meanwhile, praying it wouldn't cause damage, have driven it close to 600 more miles. Gulp. At least it runs perfectly smoothly. I just don't want to wreck my catalytic or any (more?) sensors, if indeed one is truly wrecked already. Called local Infiniti dealership for Oxygen sensor estimate w/ and w/o labor. Three days later - haven't heard back. Oh, also the tire air pressure light came on again yesterday - hopefully unrelated. Haven't checked tires yet. Does anyone think a loose wiring harness SOMEwhere might be the cause of (at least this latest) code? Don't know how any of these recent fixes might have loosened one, cuz am totally ignorant, but did read about loose wiring harness and another sensor on these forums. Thanks for any more help I can get!

 

the three systems are most likely unrelated. is the tire light on steady or flashing? p0430 is a converter trouble code i don't believe an oxygen sensor alone is going to fix the problem. however to answer another question the sensor will be approx 185 for front. approx195 for the rear. labor would be approx 140 for the front and approx 40 for the rear. with more specifics i can help as much as possible.

 

Thanks, Sonic. Where do YOU get your car serviced! Inifiniti quoted $200 for sensor, $300 for labor. Nissan quoted $210 for sensor, $235 for labor! Do you think when you change the plugs or when you change the engine air filter there's ANY way you can jar some wiring loose somewhere? The tire pressure light came on after I'd been driving a while on a moderately warm, rainy evening, then went off next time I drove it. Has been a while (of course the hubster may have put air in the tires and not told me! Probably just for grins, right? Nah.