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1990 Pontiac Grand Am OBD code 66 and 62

Tiny
GIZZARD111
  • MEMBER
  • 1990 PONTIAC GRAND AM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 181,000 MILES
The A/C on this car has been completly removed and all thats left is electrical connections and the ends of the a/c lines coming out of firewall. My question is I'm getting obd code 66 when I pull the codes and I dont ever have the a/c switch on inside the car, and I am wandering if I can bypass the electrical conector for the a/c pressure switch or if there's any other way to get rid of theses code. I am also getting code 62 and I am thinking a transmission oil and filter change might fix this? Car runs fine, Have reset the codes and it will go for a couple of weeks before the check engine light and codes comes back.
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Saturday, May 1st, 2010 AT 11:42 PM

3 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Try pulling fuse to AC system.
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Sunday, May 2nd, 2010 AT 8:12 AM
Tiny
GIZZARD111
  • MEMBER
  • 2 POSTS
Unfortunately I can't pull the fuse as that also runs heater fan
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Sunday, May 2nd, 2010 AT 6:51 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Then it may be easier to run heater fan on seperate circuit, with factory switch or aftermarket one.
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Monday, May 3rd, 2010 AT 8:23 AM

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