Really need to download the service manual, makes things much easier. P030x is not deactivation. It is an unplanned rpm loss. 9-343 in '05 SM.


(P0300) MULTIPLE CYLINDER MISFIRE (CONTINUED)
Set Condition: When more than a 1.0% misfire rate is measured during two trips.
POSSIBLE CAUSES
ENGINE CONTROL RELAY OUTPUT CIRCUIT
FUEL INJECTOR CONTROL CIRCUIT
FUSED IGNITION OUTPUT CIRCUIT
ENGINE MECHANICAL PROBLEM
COIL ON PLUG
COIL ON PLUG DRIVER CIRCUIT
SPARK PLUG
FUEL STRAINER PLUGGED
RESTRICTED FUEL SUPPLY LINE
FUEL PUMP
FUEL INJECTOR
POWERTRAIN CONTROL MODULE
For a complete Powertrain Control Module Circuit Diagram, (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).