There are hundreds of different codes that can cause the check engine light to come on. It needs to have a code reader hooked up to find out the specific code. Most auto parts stores will do this for free.
To reset the check engine light on a 2004 Toyota 4Runner, you can disconnect the negative battery terminal for about 15 minutes. This will clear the vehicle's computer memory, including the check engine light. Alternatively, you can use an OBD-II scanner to erase the trouble codes directly. However, ensure that any underlying issues are addressed before resetting the light, as it may come back on if the problem persists.
Toyota engine code 402
How do I get engine codes for 1999 toyota corolla?
Go to----- http://www.extreme-check-engine-light-codes.com/Toyota%20OBD1%20Decoder.htm---- for this info
The check engine light is reset with a scan tool after repairing the failure that caused the trouble codes.
When the light comes on it's telling you to read the engine diagnostic codes.
Engine check light comes on, and you have the codes read.
Jumping the pin connector on the ECU will allow the check engine light to flash on the dash console. The check engine light will flash repeatedly and show codes.
There are thousands of reasons. You need to pull out error codes. You can do it at local autozone store.
Check the car computer for error codes, google them.
You need an OBD2 code reader to check the codes. Just plug it in under the hood and read the codes. Use the manual to determine the codes.
To check OBD1 codes for a 1986 Toyota Cressida, first locate the diagnostic connector, which is typically found near the driver's side under the dashboard. Use a jumper wire to connect terminals TE1 and E1 on the connector. Turn the ignition to the "ON" position (do not start the engine), and the check engine light will blink the trouble codes in a sequence. Count the blinks to identify the codes, and refer to a service manual for their meanings.