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2001 Plymouth Neon Question: Question: how do i reset the drive cycle in order to pass emissions?



, Baton Rouge, LA, October 05, 2012, 15:44

OBDII inspection failed.catalyst not ready; evap. system not ready; O2 sensor not ready; ...............Not supported (items): heated cat., sec.air, A/C system, EGR. All other OBDII items show Ready. I recently replaced the battery and the alternator checks good. No check engine lights. I drove 30 miles at 6- to 70 mph and O2 Sensor shows Ready now.

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  • Answer #1

    October 06, 2012, 17:04

    May need several drive-cycles to complete all supported monitors 'readiness' codes. Catalyst and EVAP are usually the most stubborn in my experience. Any time power to the PCM is lost , or the codes are cleared manually , the monitor status is automatically cleared. Patience.

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