speedo not working
03-01-2011, 05:25 PM
#1
1st Gear Member
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Join Date: Jun 2007
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Posts: 88
speedo not working
Question, I just bought a 2003 conv GT. It has 37,000 miles on it. I probably drove the car 5 to 10 times and the speedometer stopped working as well as the odometer. Coincidently the car would randomly stall every once in a while. Any ideas guys? I appreciate all your help.
03-02-2011, 07:09 AM
#3
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
The speedometer is electronically (digitally) driven by PCM, based on input from the Output Shaft Speed (OSS) sensor on the tranny.
If the sensor or wiring are bad the speedometer and odometer will not work; also engine control will be affected as the PCM uses the OSS signal as part of IAC strategy for both idle speed and "dashpot" functions while shifting/deceleration/stopping.
If the sensor or wiring are bad the speedometer and odometer will not work; also engine control will be affected as the PCM uses the OSS signal as part of IAC strategy for both idle speed and "dashpot" functions while shifting/deceleration/stopping.
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