MY SPEEDOMETER STOPPES WORKING ONCE I HIT 65MPH ...

  • Tiny
  • dhasipi
  • 2000 Lexus GS 300
  • 13,000 miles

My speedometer stoppes working once I hit 65mph then when I come to a stop it start s again

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Saturday, March 16th, 2013 AT 3:44 PM

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  • Tiny
  • saturntech9
  • Expert
  • 29,444 posts

Do you have any codes?Also after you go past 65mph the speedometer drops to zero?

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Saturday, March 16th, 2013 AT 3:55 PM
  • Tiny
  • dhasipi
  • Member

Yes codes 420,446 once it passes 65 it drop down to zero I've changed the speed sensor on the tranny and still does it

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Thursday, March 21st, 2013 AT 3:42 PM
  • Tiny
  • saturntech9
  • Expert
  • 29,444 posts

The P 0420 is a cat code the P0446 is evap vent control fault neither will cause the speedo to stop working. You need to have a professional scan tool scan your car and not a diyer scan. The professional scan tool can scan all the computers for codes. The diyer scan tools can only scan generic obd2 codes.

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Friday, March 22nd, 2013 AT 12:48 AM

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