With out knowing the test you did for the codes I'll post them for you.
41 = Exhaust Gas Oxygen (EGO) sensor: voltage signal always "lean" (low value) - does not switch.
Exhaust Gas Oxygen sensor
The EGO sensor is threaded into the exhaust manifold, directy into the stream of the exhaust gases. The ECA uses the sensor to "fine tune" fuel delivery. The sensor generates a voltage of 0.6 to 1.1 volts when the exhaust gas is rich (low oxygen content). The voltage changes to 0.4 volts or less when the exhaust gas is lean (high oxygen content). The sensor only operates after it reaches a temperature of 660 degrees F / 349 C
44 = Problem in Themactor Air Control system.
Thermactor Air System
An emission control system coof an air pump, air flow control valves (TAB & TAD) and a catalytic converter. The converter removes pollutants from the exhaust stream. An air pump brings outside air (when needed) and sends it either to the exhaust manifold ("upstream") or directly into the converter ("downstream"). The ECA controls the air path for best performance under different engine operating conditions. The air pump always runs when the engine runs. Usually the incoming air is directed to the converter. Air is kept out during extended iding (prevent converter overheat) or during very cold engine starting. Air goes into the exhaust manifold during normal engine warm-up. This helps burn hot, unused fuel vapors in the exhaust stream (reduces pollutants - speeds exhaust warm-up). The TAB and TAD valves may be separate units, or combined into one assembly.
AM-1
Air Management solenoid #1, also called TAB
TAB
Thermactor Air Bypass solenoid. (Sometimes called AM-1.) The ECA energizes this solenoid to apply vacuum (and thus activate) the TAB valve. Normally, this valve allows incoming air to pass into the rest of the system. When Actived, the valve takes the incoming air and dumps it back into the atmosphere. Refer to Thermactor Air System description for more details.
AM-2
Air Management solenoid #2, also called TAD
TAD
Thermactor Air Diverter solenoid. (Sometimes called AM-2.) The ECA energizes this solenoid to apply vacuum (and thus active) the TAD valve. Normally, this valve directs incoming air to the catalyticconverter. When activated, the valve takes the incoming air and directs it to the exhaust manifold.
ECA
Electronic Control Assembly. The "brains" of the engine control system. It is a computer housed in a metal box with a number of sensors and actuators connected with a wiring harness. Its job is to control fuel delivery, idle speed, spark advance timing and emission systems. The ECA receives infomation from sensors, than energizes various actuators to control the engine. Sometimes vehicles have additional computers controlling other functions. These include antilock brake and active suspension systems.
47 = Exhaust Gas Oxygen (EGO) sensor signal voltage indicates "rich" during "lean" air/fuel conditions.
or,
Vane Air Flow (VAF) sensor - voltage signal is low.
or,
Transaxle problem - 4X4L switch is closed
Vane Air Flow sensor
This sensor is a rotary type potentiometer connected to a moveable flap. It is located inside the vane meter assembly - a housing between the air cleaner and throttle body through which all incoming air passes. Flowing air pushes against the flap. The sensor sends a signal based on the flap position. The voltage signal increases when the flap moves because of increased incoming air flow. The ECA determines the amount of incoming air with this sensor. This infomation is used for control of fuel delivery, spark advance and EGR flow
91 = Exhaust Gas Oxygen (EGO) sensor - signal voltage always indicates "lean" either during Engine Run Self-test ("rich" air/fuel conditions) or normal engine operating conditions.
or,
Transaxle problem - Shift Solenoid 1 (SS1) circuit failure.
SS1
Shift Solenoid #1. Located in certain electronically controlled transmissions along with Shift Solenoid #2. The ECA energizes these solenoids (one or both) to engage the desired transmission gear.
Hope that helps,
ThunderSC