P2004 - Intake Manifold Runner Control (IMRC) Stuck Open (Bank 1)
P2005 - Intake Manifold Runner Control (IMRC) Stuck Open (Bank 2)
This DTC is set when the IMRC is commanded closed, but the IMRCM indicates open. This DTC replaces P1518 and P1537.
IMRC monitor signal circuit shorted to PWR GND or SIG RTN
Damaged IMRC actuator or solenoid
Damaged PCM
Blocked vacuum hoses
An IMRCM PID reading near approximately 1 volt at closed throttle may indicate a fault.
You should be able to see the runners cycle during self test.
Never heard of the P2020