The check light is continously shown ON - 1990 Toyota Land Cruiser

1. The Check Engine light tells you the computer found a problem with your vehicle's running condition.
2. If the vehicle is drving OK, a Check Engine light is not a reason to pull over. But get the problem fixed soon.
3. In testing areas, you will fail your emissions test if the Check Engine light is on.
4. Fuel economy generally suffers when the Check Engine light is on.
Have a diagnostic scan run and report back with trouble codes retrived...from that i can determine and recommend needed repairs.
Hope this helps and answers you question...good luck.

Remove the terminal head from the battery if only you run a scan and there seem not to be any issue or code reported.

But I strongly recommend the scan.

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