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1986 Chevy Monte Carlo Service engine light

Tiny
MATT86SS
  • MEMBER
  • 1986 CHEVROLET MONTE CARLO
  • V8
  • 2WD
  • AUTOMATIC
  • 99,228 MILES
I just bought an 86 Monte Carlo with a 5.0L 305 V8 and it sounds like it runs great, the only issue is that the service engine soon light is always on. I can't seem to figure out why? Any suggestions?
Friday, February 20th, 2009 AT 2:59 PM

2 Replies

Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hi Matt,

You will need to get the codes read. You can purchase an obd1 code reader at your local auto parts store for about $30 or so. Or you can order one from us at the link below.

It may just be an O2 Sensor, just wont know till get codes read.

.
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Friday, February 20th, 2009 AT 3:10 PM
Tiny
DAN DEAVERS
  • MEMBER
  • 3 POSTS
Matt,

We had a similiar problem. Try to make sure the gas cap is firmly seated. If necessay, get a new gas cap.

Takes about 1 week for problem to go away.
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Wednesday, May 20th, 2009 AT 7:41 PM

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