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1993 Nissan Sentra check engine lamp on

Tiny
CJASCHEK
  • MEMBER
  • 1993 NISSAN SENTRA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 145,000 MILES
I bought a car a week ago. When I went to smog it, the mechanic said it failed because check engine light wasn't illuminating before starting the engine. So I investigated and found the bulb missing! After replacing it, it wont turn off. So i'm figuring its either an o2 sensor or air intake sensor? I dont know how many exhaust sensors there are. Is there a way to test them myself without a code reader; can I clean the air intake sensor with anything to help? The only symptom I recognize is a low idle drop momentarily upon stopping or sometimes when switching into drive from park or reverse. Any advise would be appreciated, thanx!
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Sunday, December 23rd, 2007 AT 10:24 PM

2 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

best not to second guess these things, go get a code read and also have them removed. See what codes re set if any, the previous owner has removed the globe because he / she could not or did not want to fix what ever fault is setting the light.

Mark (mhpautos)
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Sunday, December 23rd, 2007 AT 10:36 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Mark-you beat me on this when I came back your here okay see also below

The computer has a stored code in it -you can do below if you wish/retrieve it.


https://www.2carpros.com/forum/automotive_pictures/12900_cel_1.jpg




https://www.2carpros.com/forum/automotive_pictures/12900_cel2_1.jpg

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Sunday, December 23rd, 2007 AT 10:46 PM

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