Code P0401?

I ran the truck with Live Data displayed on the scanner but the only thing that gives me a voltage rating is the oxygen sensors.

The parts store had stock of the EGR Vacuum Solenoid, replaced that, still the code returns.

No pending codes or stored codes.

I'm not sure how to report mode 6 yet from the scan tool. Need to learn how to download the data. Two things I noticed, it failed the upstream delta pressure test and failed the initial tank vacuum and minimum test. Everything else, off of the top of my head did "pass" or "ok".

The EGR Vacuum Solenoid gets initially 14v on one pin and 0.08v on the other, after a few mins 14v on both pins. This is with the connector installed on the solenoid and engine running.

Hello Alex and JIS001,

Okay, so my wife took the truck to the grocery store and around town today. It's still slightly rough but no trouble codes. JIS001, I think I posted my message at just the same time as you when you asked me for TID$53. I checked, I don't have TID$53 available, when I look at the menu Onboard Monitor Test. It does have TID$50.

Here are all the TIDs available and their corresponding data:
TID$50, TOTAL ENGINE MISFIRE RATE AND TYPE: MOD $10; Test 0; Min- ; Max A3D. STS: OK
TID $10, NOT10 FRONT SWITCH RATIO BANK2: ID 21; MOD $10; TEST 2D; Min-; MAX 30. STS: OK
TID $21, INITIAL TANK VACUUM READING (MAX LIMIT): ID 00; MOD $10; TEST EBF0; MIN EB00; MAX-; STS OK.
TID$22, LEAK CHECK VACUUM BLEEDUP: ID 00; MOD $10; TEST 16B; MIN -; MAX 500; STS OK.
TID$25, VAPOR GENERATION MAX PRESSURE RISE: ID 00; MOD $10; TEST 8000; MIN 300; MAX -; STS OK
TID$41 DATA, DELTA PRESSURE FOR UPSTREAM HOSE TEST: ID 11; MOD $10; TEST F; MIN FC80; MAX-; STS FAIL
TID$4A DATA, DELTA PRESSURE FOR LOW FLOW TEST: ID 30; MOD $10; TEST 4C5; MIN 300; MAX-; STS OK
EGR, COMMANDED EGR DUTYCYCLE FOR LOW FLOW TEST: ID 30; MOD $10; TEST 4778; MIN-; MAX 6666; STS OK

Of my I/M READINESS Codes here's what I have:
MIL- OFF
MIS- Ok
FUEL- ok
CCM- ok
CAT- INC
HCAT- N/A
EVAP- ok
Air- N/A
02S- ok
HTR- ok
EGR- ok

Live Data:
DTC_CNT 0
Fuel sys1 CL
Fuel sys2 --
Load_PCT(%) 13.3
ECT(degrees F) 338
SHRTFT1(%) 4.7
LONGFT1(%) 0.0
SHRTFT2(%) 2.3
LONGFT2(%) -1.6
RPM(rpm) 892
VSS(mph) 0
SPARKADV(degrees) 27.0
IAT(degrees F) 204
MAF (Ib/s) 0.00
TP(%) 18.4
O2SLOC B1S12-B2S12
O2B1S1(V) .790
SHRTFTB1S1(%) -1.6
O2B1S2(V) .015
SHRTFTB1S2(%) n/a
O2B2S1(V) .175
SHRTFTB2S1(%) 0.0
02B2S2(V) .550
SHRTFTB2S2(%) 99.2

Okay, I think that's everything I've got. Any recommendations on software to view this data on my computer? The scanner has a cord to connect to a computer, but doesn't offer any software-strange. What do you think?

Is my MAF always supposed to be 0 at idle?

I dont have the capability to extract this information right now. Do you have a plan "B"?

Okay, I solved one portion of it. Got the piece of tape out of #4 spark plug using a 11/16" spring, with a 13mm ratchet stuffed into it so I could crank it. After pushing down into the spray plug canal and twisting it grabbed the tape and pulled right out.

I was driving around with the scan tool plugged in, when a misfire happened and it showed #4. I immediately pulled over, got the tape out after some time. After that, Bc the engine was warm, the plug came out easy. Just in case the coil pack was bad, I swapped it with a good one from #1. Started it up, drove with the scan tool still plugged in but at low speeds it felt fine. I noticed that my Bank 1 fuel trims were still off and felt a rumble at high speeds, so on a chance I grabbed a new coil pack and replaced the one up front. That solved the high speed rumble I was feeling!

I think I still have another slow failing coil pack, bc I feel the occasional rumble, after studying my fuel trims by bank I think it's in bank 2. I think I have a small vacuum leak also but nothing like I was experiencing beforehand.

That did it for now. Thanks for your help!

I will ask the local auto parts store.

Which pin am I looking at for voltage change?

I have 1.1v on the brown/green wire with the key on engine off.

Is there a way to remove the DPFE and the solenoid and test them individually? If I put a vacuum to the EGR, the vehicle almost stalls.