Dtc codes everywhere

[000martin]

Hey guys I need your help. 

My ‘06 GMC Sierra Denali truck is having issues. It started being real sluggish on acceleration and tossed quite a few DTC codes. 

All codes have to do with air, fuel, or throttle response and those are: 
P0641- 5 volt reference signal
P2101- control module throttle actuator position performance
P0101- MAF sensor performance
P0102- MAF sensor circuit low frequency
P0107- MAP sensor circuit low voltage
P0120- TPS performance 
P0220- accelerator pedal position sensor 2 circuit
P1516- TAC module throttle actuator position
P2101- control module throttle actuator performance
P2135- throttle position sensor 1-2 correlation
P0068- throttle body airflow performance

also a couple codes for o2 sensors too rich bank 1 & 2

 

All this started happening the same day, so I feel pretty sure that it’s one or two issues causing this mess. i am hoping one of y’all can point me in the right direction and thanks in advance. 

 

 

[Jsdirt]

The 1st code is more than likely the cause of the rest of the codes. Without the 5v reference, few sensors will work - that's the lifeblood of a sensor. What the sensor does with the 5 volts corresponds directly to the conditions it's reading (whether it's a TPS, MAF, MAP, etc..), and that info is deciphered by the ECU.

 

There might be a shorted sensor that pulled down the entire 5v ref, or, the wiring for the 5v ref from the ECU is shorted, or open, or the ECU itself is bad.