R E A D E V E R Y T H I N G !!!

P0037 : P0037 indicates that, for the engine to run correctly, the exhaust must have a specific air fuel ratio of 14.7 to 1 as determined by the Heated oxygen sensors (HO2S), which detects the oxygen content of the vehicle exhaust.

P0661: The P0661 code means that the PCM or another control module on the car has detected voltage from the intake manifold tuning valve control circuit that is lower than the automaker's settings.

Tools Needed:
10mm socket
3 inch wobble extension or universal with straight extension
Blue tape or clean microfiber hand towels
Patience & caution ⚠️

Parts Used:
Bosch Oxygen Sensor 15043 (B1S2)
Dorman # 911-707 EGR Vaccum Solenoid aka SSV Code P0661

Notes:
Blue Connector (top)
White Connector (middle)
Black Connector (bottom)

The P0661 refers to the white Connector in the middle.