Check Engine Light Not On But Codes Found

Press the erase clear button on your scanner then turn off the key and disconnect it.

Check engine light not on but codes found.

So no codes when it was scanned. After pressing erase clear and waiting until you see a no codes message you can turn off your vehicle and disconnect the scanner. For example any problem that affects the emissions system will automatically light the check engine light. If your check engine light is on but no code it s your scan tool not the vehicle.

You ve only got two choices at this point. In that case you could scan the computer and find a code even though the light wasn t on. Most frequently the software errors stem from a low level obd reader being used. However all error codes are stored so you can look at historical data even with a 10 bluetooth obdii dongle and see what the code was before.

There are other cases where there s no check engine light but codes. But if the problem is not emissions related and also not critical it may be stored in the computer but not light the check engine light. I d guess that something happened which triggered the light but the condition didn t persist. Everything in the obdii code list is in some way related to emissions.

This is often the result of something being wrong with the obd reader that the driver parts store or mechanic shop is using. Clearing any codes present will turn off your check engine light temporarily. If the check engine light is on you ve got a trouble code stored. Generally if the light is coming on and no codes are stored the processor that triggers the light is faulty or the circuit is shorted to power.

The same is true if you have abs light on tcs light on vsc light on etc.