1999 Nissan Altima Q&A

1999 Nissan Altima Question: In park or idle it sometimes revs and then idles low

Sometimes in Park or idling at a stoplight my car revs up and then down without my touching the gas, what's going on? -
Answer 1
There are several sensors that can cause this, or a vacuum leak, or an issue with the idle controls. Is the check engine light on? -
Comment 1
Yes -
Comment 2
All the time in Park or idling at a stoplight my car revs up and then down without my touching the gas, what's going on? And the check engine light is on -
Answer 2
Get the diagnostic codes in the engine computer checked and diagnosed. -