Something in the speedo circuit has possibly failed and the computer set a code for it.. Have it checked for codes.
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.
the speedometer on my 97 toyota camary stopped working and the check engine light came on why
2002 Tahoe speedometer quit working and trans will not shift, ABS light on. NEW ANSWER: You need to have the engine and transmission scanned with an OBDII engine scanner so you can find out what speed sensor has gone bad / quite working.
Check the speed sensor.
wipers,headlights,speedometer,door locks,air conditioner,electric mirrors, stopped working
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.
check your speedometer sensor located back left of engine bay on top of the transmission
I once had the same problem in my 89 Sunbird turbo. The computer "ECM" went bad and the speedo stopped working. I would see what ECM codes you have causing the check engine light and go from there.
The best way to find your vacume leak is to start it up and spray starting fluid around and when you hear the engine rev that's where the leak is at
There are several possibilities why the speedometer is not working. The VSS, vehicle speed sensor may have failed or become unplugged. The speedometer may have failed, or the ECM, engine control module, may have failed or there could also be wiring issues.
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.
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