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My speedometer stoppes working once I hit 65mph.

Tiny
DHASIPI
  • MEMBER
  • 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
Saturday, March 16th, 2013 AT 3:44 PM

3 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 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
  • 2 POSTS
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
  • MECHANIC
  • 30,870 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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