You need to have the system checked for codes. You will then know why the light is coming on.
why do check engine light comes on
It means check your transmission, why not start with the oil.
Have electronic vehicle speed sensor in transmission checked out. It will cause loss of speedometer function and set a fault code(check engine light).
The light comes on when the computer detects a malfunction that affects emissions or the transmission. You will need to have the codes checked with a scan tool to know possible causes.
How do you check the transmission fluid level on 1999 jetta GLS?
I have a 99 Hyundai Sonata That the check engine light came on, and # 3 & 5 Injectors were fouled
The check engine light comes on when the computer detects a problem and sets a code. You need to have it diagnosed with a scan tool.
Have it checked for codes.
Happened to me too.. Solenoids had to be replaced.
There is no change transmission lamp.
The light comes on when there is an emissions related failure and the pcm sets a code.
It comes with a 4L60E or 4L80E