Quote:
Originally Posted by felix0121
Several months ago, I got a new battery (Nissan-genuine) installed. But I don't know whether the ECU was reset at that time.
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If the battery was disconnected for very long, the ECM was reset. But it only takes a few days (depending on your driving habits) for emissions to read ready. The conditions that have to be met are listed in the FSM.
Your problem may be related to the P0335 (crankshaft position sensor) you saw. If the code has reappeared, get that fixed and see if it fixes the emissions problem.