The Supplemental Inflatable Restraint (SIR) system supplements the protection offered by the driver and front passenger seat belts. The SIR system deploys an air bag from the center of the steering wheel and from the right side of the instrument panel. The knee bolsters and the steering column absorb crash energy. The driver and passenger knee bolsters are below the instrument panel.
Here is a list of some common codes that will be stored in the computer if the warning light comes on:

View a list of ABS brake computer trouble codes and their descriptions.

C1214 Brake Control Relay Contact Circuit Open 
C1215 Brake Control Relay Contact Circuit Active 
C1216 Brake Control Relay Coil Circuit Open 
C1217 Brake Control Relay Coil Circuit Short to Ground 
C1218 Brake Control Relay Coil Circuit Short to Voltage ...

Engine computer trouble codes list and descriptions.

DTC P0013 Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit
DTC P0014 Exhaust Camshaft Position (CMP) System Performance
DTC P0016 Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation
DTC P0101 Mass Air Flow (MAF) Sensor Performance
DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency
DTC P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency
DTC P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage...