Readiness and the drive cycle
#61
The snag - on rare occasions but they happen - is a kind of Catch-22 where the monitors were cleared then can't set due to some fault that in turn can't be flagged due to not enough set monitors. (Ideally you'd never clear codes and never disconnect the battery (or have a flat one) so this Catch-22 could not happen.) The logic inside the PCM is horrifyingly complex and only mostly works when faults are present!
#62
The snag - on rare occasions but they happen - is a kind of Catch-22 where the monitors were cleared then can't set due to some fault that in turn can't be flagged due to not enough set monitors. (Ideally you'd never clear codes and never disconnect the battery (or have a flat one) so this Catch-22 could not happen.) The logic inside the PCM is horrifyingly complex and only mostly works when faults are present!
Last edited by 64vette; 01-13-2016 at 10:14 AM.
#63
#65
#66
i have the same issue, cannot pass smog in ca. cannot get the car to reset itself, new battery and other work 200 miles ago and will not pass smog...so i will just keep driving, that's all i can do. it's somewhat comforting to see others have had this same frustrating problem and eventuallly the car just resets itself.
#67
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