Lots of problems could cause the light to come on. First off, check your fluid levels; second, take it to a mechanic.
Your mom.
A flashing check engine light means that you have a problem with your engine that may cause harm to the catalytic converter.
disconnect the battery
sending unit in tank
The check engine light for the 2001 Isuzu Rodeo often comes on because of a sensor that is damaged or malfunctioning. The most common sensor is an oxygen sensor and when reset, this often allows the light to be reset.
My check engine light has been on for one month but last night my check trans light flashed off and on about 3miles till I was home. Why and what do I need to do? I have a 2000 Isuzu rodeo.
get a new one
There are dozens and dozens of causes for the check engine light to stay on. You need to have the computer checked for codes to know possible causes.
The engine is overheating. The check engine light is not on because you have no problem with the emissions system which this light monitors.
Check your gas cap.....My check Engine light always comes on if it is loose or not on at all.
You'll need a ODBII code reader to reset the check engine. The connection is under the stearing colonm. First check the code, clear the problem and the reset the light.
Your bad muffler might be part of the reason your check engine light comes on. Usually, your bad muffler causes something else to go wrong and that causes your check engine light to come on. Problems cascade.