WHAT DOES THE CODE PO645 MEAN - THE A/C CLUTCH RELAY CIRCUIT IS OPEN OR SHORTED?

  • Tiny
  • SKsilver
  • 1999 Chrysler Sebring
  • 158 miles

What is the a/c clutch relay circuit? Code PO645 on a 1999 chrysler sebring lxi

Saturday, October 6th, 2012 AT 2:13 PM

5 Answers

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,551 posts

The computer is trying to complete the command to turn on the ac and it cannot as it does not see a signal to ground.

The circuit has to be checked as to why there is no signal to the pcm

Roy

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Saturday, October 6th, 2012 AT 4:35 PM
  • Tiny
  • SKsilver
  • Member

Thank you very much, the air and/or heat hasn't been coming out of the vents very well. And a year ago it was looked at by a mechanic who said it just needed cleaned out, but the problem restarted about 6 months later. Thank you again.

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Saturday, October 6th, 2012 AT 8:49 PM
  • Tiny
  • SKsilver
  • Member

Would that relay cause the air or heat to not come out the vents very well? Or maybe it just needs recleaned again?

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Saturday, October 6th, 2012 AT 8:57 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,551 posts

No, that could be the blower motor itself.

Roy

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Saturday, October 6th, 2012 AT 10:18 PM
  • Tiny
  • SKsilver
  • Member

Thank you.

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Sunday, October 7th, 2012 AT 2:23 AM

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