2010 ECM Issue or Something Else?

[BLVCKWAVE]

Hello all, hopefully someone has been through a similar situation here and can help shed some light on this absolute electrical nightmare I am facing.
I appreciate all your replies for anyone who spends the time to take a look at this. Thanks!

SYMPTOMS AND STORY SO FAR:

+ 2010 V6 Began stalling at idle. Idle spikes and then dips and hesitates
often times resulting in a stall at a red light or stop sign.

+ Car restarts fine and drives fine until idle. Maybe poorer gas milage?

+I can prevent the stall by lightly holding the gas while on the brake.

+ Runs ok on first drive with minor idle issue.
+ After running for about 30 mins and resting the hot soak seems to make the stalling
10x worse and stalls are constant and idle is WILD.

+ A/C & HEATER both work only sometimes. Seemingly randomly. Air is cold. Then it's not. Same for heater but vice versa.
+ Wireless Key FOB just started acting weird and now only works occasionally as well. Battery is new. Tests fine for signal.

+Paid 2 more Mechanics for Diagnostics:
One said "For Sure its the AC Compressor"
One said "Its the ECM/PCM gone bad replace PCM AR3Z-12A650-VB"

I don't know what to do at this point.

PARTS REPLACED SO FAR:
NEW EGR Valve
NEW MAF
NEW Vapor Canister
NEW Spark Plugs
NEW BATTERY
CLEANED Throttle Body tested good
TESTED new O2 sensors. Returned cause problem continued.


Codes are as follows scanned at 3 different intervals:

FIRST SCAN CODES
P0133
o2 Sensor Circuit
Slow Response (Bank 1, Sensor 1)
P061B
Internal Control Module
Torque Calculation Performance
P2195
o2 Sensor Signal
Biased/Stuck Lean (Bank 1, Sensor 1)
P2197
o2 Sensor Signal
Biased/Stuck Lean (Bank 2, Sensor 1)


SECOND SCAN
P0053
HO2S Heater Resistance (Bank 1 Sensor 1)
P0059
HO2S Heater Resistance (Bank 2 Sensor 1)
P0401
Exhaust Gas Recirculation A Flow Insufficient Detected
P2196
O2 Sensor Signal Biased / Stuck Rich
(Bank 2 sensor 1)
P2198
2196
O2 Sensor Signal Biased / Stuck Rich
(Bank 1 sensor 1)


THIRD SCAN
P0053
HO2S Heater Resistance (Bank 1 Sensor 1)
P0059
HO2S Heater Resistance (Bank 2 Sensor 1)
P0401
Exhaust Gas Recirculation A Flow Insufficient Detected

I know this is alot; so if you are still here reading this; thank you in advance for any shared knowledge.

 

[little troy]

Not sure if this will work but it cant hurt. Have you Checked the ground wires? Negative terminal connection, chasis ground and the ground to the fuel pump. Sounds like a possible grounding problem. Definitely cant hurt to check

 

[Eman]

Who is reading the codes? Is there any diagnosing being done or just random parts replacement?
I would read and document all codes, then clear them after an underhood inspection.
Are there any aftermarket "performance" items installed. Any owner or previous owner modifications especially electrical? Any "boogered" wiring? All of that would be first things to look at and or eliminate. Then I'd road test, duplicate the problem and note the first codes stored and monitor data for those systems.
16yo vehicle, unknown mileage and condition did problem start suddenly? Gret worse over time or after work done?

 

[BLVCKWAVE]

Not sure if this will work but it cant hurt. Have you Checked the ground wires? Negative terminal connection, chasis ground and the ground to the fuel pump. Sounds like a possible grounding problem. Definitely cant hurt to check

Not sure how to check the actual grounding wires. But I did follow a youtube "bad ground test" using a multimeter and am getting massive drops on the engine block. So it seems there is def a bad ground at play now. If that's not THE problem. It is certainly A problem. Any good videos or diagrams of locations and which wires to check you can reccomend?

 

[BLVCKWAVE]

Who is reading the codes? Is there any diagnosing being done or just random parts replacement?
I would read and document all codes, then clear them after an underhood inspection.
Are there any aftermarket "performance" items installed. Any owner or previous owner modifications especially electrical? Any "boogered" wiring? All of that would be first things to look at and or eliminate. Then I'd road test, duplicate the problem and note the first codes stored and monitor data for those systems.
16yo vehicle, unknown mileage and condition did problem start suddenly? Gret worse over time or after work done?

I am reading the codes currently. I have taken it to two shops though and I am not 100% on what or how they did what they did;
but they sure knew how to talk and pretend like they knew what they were doing enough for me to throw parts at it randomly. SMH.

I have had the car with no issues for about 10 years. There is some odd extra headlight wiring not connected to anything attached to the battery I have never needed or had problems with but nothing notable. The codes are the same every time I clear and check engine comes back on as listing in OP except it's 50/50 whether the o2 sensor banks are stuck LEAN or RICH. Problem seemingly started after my old battery died and a new one was installed but not the exact time. Just a small correlation and minor possibility. Have swapped battery again since then though and still have issue.

I believe I found a grounding issue so hopefully once I can track it this solves the issue.

 

[DieHarder]

FWIW, with the engine running what is the voltage DC across the battery? If less than 14v you likely have a grounding issue; especially if you have voltage drops from the body (ground) of the alternator back to the ground on the passenger strut tower. If so, you need to fix that first. See below:

Finally found the cause of my low voltage - Beware the all important grounds.

Hope this helps.