So i need to pass a car inspection and suddenly my speedometer just started going crazy. moving up and down rampid. Any easy ways to fix this problem? my dash works fine all other gauges work fine its just my speedometer isnt. Plz help or provide advice.

 

they rly dont check that when they do an inspection lol. i dont even think a speedo is required by law.

 

If CEL is on, check the CEL FIRST!! (CEL = Check Engine Light)

If the CEL pertains to the speedo sensor, ding ding ding, it's probably just the sensor located ontop of the transmission.

If CEL is NOT on....
Problem: The speedo doesn't work but the odometer works.
Solution: Replace the cluster or just replace the speedo gauge

Problem: The speedo doesn't work AND the odometer doesn't work.
Solution 1*: Bad Sensor - Replace the speedo sensor in the transmission.
*CEL should be on
Solution 2: Bad Gauge - Replace cluster or just replace the speedo gauge
IF Neither solution above fixed it.
Solution 3: Check all wiring from the sensor to the gauge. Because the signal is disrupted somewhere.

 

sounds to me because ive had this problem
1: bad speed sensor on trans
2: bad speed sensor connector plug