The Check Engine Light may illuminate indicating a primary ignition signal fault. Many times the cause is an ignition coil(s) that has failed. The problem in the coil causes the spark energy to feedback through the wiring harness into the other coils. If this is not repaired, it can damage the other coils (blistering on the coils may be seen).
Problems for specific Nissan Maxima years:
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Most reported 2000 Nissan Maxima problems
The idle speed control motor may fail and possibly damage the engine's engine control unit.