You need to have it checked for codes to know what to diagnose.
Nope, bet it was the other way around... Your speedometer stopped working and your check engine light came on. A broken speedometer (don't know what car so I can't pinpoint it) will cause a whole bunch of codes.
check your speedometer sensor located back left of engine bay on top of the transmission
The check engine light only comes on for something that affects emissions
There is no speedometer cable on a 1995 caravan. it is done by a speed sensor on the transmission and digtal data is sent to the computer and the computer then sends the signal to the speedometer. This is the case even when the speedometer looks analog. Likely a bad speedometer is the cause if it does not move as the speed sensor is used for other functions and would trip the "check engine" light if it was bad. the speedometer is part of the instrument cluster and likely you would need to change the whole thing.
the speedometer on my 97 toyota camary stopped working and the check engine light came on why
I think you need a speed sensor
there is a speed sensor on your transmission, probably about 15 bucks, and easy to replace, try there, but first check your fuses.
Bad speed sensor.
Check the speed sensor.
maybe your speed sensor is bad you will get a check engine light on the dashboard too.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.