Your mom.
your oxygensensor is bad ,its screwed in to your exhaust manifold, about 30.00
Check the O2 sensor.
Lots of problems could cause the light to come on. First off, check your fluid levels; second, take it to a mechanic.
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
Check your engine. Check your fluid levels and add if needed.
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.
Check the heater core if weather not responsible.
Check my isuzuparts.com
check your PCV Valve
get a new one