4 replies to this topic

[Scott Malbon]

My ODBII scanner gives me this error code on my 99 and also says "sensor A circut intermittent." Stuff on the web about this code is inconsistent and confusing. (This is a new build and I got wacky results on the dyno runs. Don't know if this is related. Trying to figure out what the issues are.) Any info appreciated.

Scott

[Jim Drago]

scott
that is oxygen sensor. If you pulled at dyno, to install dyno o2 sensor it will come on. It does not effect driveability
Jim

[DES4]

As Jim pointed out, it's an O2 sensor fault; more specifically, it's for the heater circuit. O2 sensor heater circuits are there to quickly bring the sensor up to its operating range; once the vehicle is fully warmed-up, the heater is no longer relevant. Therefore, it should have no effect on a fully heated-up vehicle in closed-loop trim. Early model cars (pre-OBD II) typically lack an O2 sensor heater, so they spend more time in open-loop after a cold startup.

Your car does not have a pedal-position sensor; this fault description does not apply to your car. "P" codes can be very manufacturer/year specific, although they are commonly called "generic codes". You need to be sure that any time you use a p-code fault description for trouble-shooting that it is correct for your manufacturer and year.

[Jim Boemler]

Most of the Pxxxx codes are "legislated", meaning that the definitions are industry-wide and consistent. The P1xxx codes are intended for manufacturer use, and will vary across manufacturers, models, and years.

[Scott Malbon]

Thanks all. I appreciate the expert advise.

Scott