Clean oil
EGR valve sooted up
The sensor is in the near side wing mirror If you look at the bottom of the mirror you can see it
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
The OBDII connector is under the dash on the driver side.
How to remove ecu from a renault clio 2003
The 2003 Chevrolet Malibu OBD 2 port is on lower edge of dash left of steering column
A new lock on hatch door of 2003 Renault megane scenic cost a whopping £126 - supplied and fitted by a local garage in Greenock (colour matched too - dark blue). Try the scrap yards before buying brand new. Looks like this is a common problem amongst megane scenics as we now play a game - spot the missing button and you'd be amazed how often we see megane scenics with a missing lock button.
The 2003 Chevrolet Malibu OBD 2 port is on lower edge of dash left of steering column
All ODB-II compliant vehicles either have the connector at the bottom edge of the dash on the driver's side, or they have a label at that location stating where the actual connector can be found.
Thar are located behind the bumber up in the grill area. Any electrical connector that has a YELLOW connector on it will be the air bag sensors. There is more then 1.
The connector is under the dash although a little harder to see. Hyundai will not release the code meanings for their cars, so your connecting the scanner will not give you much good information.