Chrysler
Type:
    Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description:
    EGR Position Sensor Rationality Failure Conditions
Cause:
    Cold engine startup completed, then the test started and the PCM detected that the EGR flow (through the valve movement) was not what it expected during the test period.

Generic
Type:
    Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description:
    Exhaust Gas Recirculation "A" Control Circuit Range/Performance

GM
Type:
    Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description:
    EGR Open Position Performance Conditions
Cause:
    Engine running, system voltage over 11v, then the PCM detected that the difference between the Actual EGR position and the Desired EGR position was more than 10% for 10 seconds