Why wont the monitors set?

Tiny
BIGMIKAL2006
  • MEMBER
  • 2004 FORD F-150
  • 130,000 MILES
I have a 2004 ford f150 and monitors wont set. Cat and o2s. Poss computer issue but what do I test?
Monday, September 17th, 2012 AT 10:05 PM

1 Reply

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
If the thermostat is stuck open the monitors will not set. I would remove it to see if it is open.
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Monday, September 17th, 2012 AT 10:21 PM

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