Random P219A (Fuel Trim Cylinder Balance Bank 1)

[opfor2]

So every now and then I get a random p219a code. It will set and then a day or two later it will clear and then show up again a week or so later. I looked at all of the suspects per (https://charm.li/Chevrolet/2011/Suburban 4WD V8-5.3L/Repair and Diagnosis/A L L Diagnostic Trouble Codes ( DTC )/Testing and Inspection/P Code Charts/P219A/) and all seems well. I'm at a loss as to what else to try any ideas would be helpful.

 

[rdezs]

You've probably got a vacuum leak. Make sure the dipstick is pushed all the way down, there's an o-ring that seals. Same for the oil filler cap. Check your PCV hoses to the intake. I find that a spray can of brake cleaner works great in finding where there's a vacuum leak, such as the intake manifold and gasket. Just be careful, it's flammable. Some people use WD-40, a little safer.

 

[rdezs]

.... It should be on the driver side of the engine though, if that helps. (The letter A signifies Bank 1 which is the driver side) As there's no code for the passenger side, I would suspect the intake manifold gasket or an injector o-ring on the driver side.

 

[Fless]

Compare the short- and long-term fuel trims for both banks, cold and warmed up. That's a lot of numbers but could be telling.

 

[petethepug]

After going through that supplied link for the DTC and reading it, I’m kinda spooked about purchasing a counterfeit part that’d send me on a wild goose chase.

 

[rdezs]

The disturbing thing is that what was OEM eight years ago, may not be the same OEM they sell you today. For some items, production has been moved to other countries, including China. Even though it's still an AC Delco part.... You have to wonder if it's really identical to the original in every aspect. Look at the country of origin on the below AC Delco package... I assume this item is being made in one of those countries, or maybe two or three or all of them... And it's not a generic package with that hologram. I'll bet 10 years ago they had one supplier for AC Delco, probably in Canada or Mexico. So yeah, unnerving to think about.

 

[rdezs]

So technically it's not counterfeit. But... They are presenting something that is not OEM from 2014.

 

[opfor2]

After going through that supplied link for the DTC and reading it, I’m kinda spooked about purchasing a counterfeit part that’d send me on a wild goose chase.


View attachment 447450

Yes..... I used Denso 234-4668 for upstream and Denso 234-4256 for downstream and I'm wondering if that may be the issue. This code is so "Random" i just don't know. I usually use only OEM parts but they were not available from RA when I bought the Denso's.

 

[petethepug]

I had to get mine from AutoZone and ordered 8 new OEM injectors too. Never had a poor experience w/ AZ until that transaction.

Their call center pointed fingers at FedEx who never got the package but verified they made the shipping label. Ultimately they sent me 16 injectors and were just nasty to work with.

I kept the first 8 and returned the other 8 back to their local store. It was funny to unexpectedly get the last laugh but I would have been happier just paying AZ to get what I originally paid for weeks ago.

 

[j91z28d1]

The disturbing thing is that what was OEM eight years ago, may not be the same OEM they sell you today. For some items, production has been moved to other countries, including China. Even though it's still an AC Delco part.... You have to wonder if it's really identical to the original in every aspect. Look at the country of origin on the below AC Delco package... I assume this item is being made in one of those countries, or maybe two or three or all of them... And it's not a generic package with that hologram. I'll bet 10 years ago they had one supplier for AC Delco, probably in Canada or Mexico. So yeah, unnerving to think about.

View attachment 447452

funny how there's literally only 3 parts in that bag and made in 6 countries listed lol.

 

[rdezs]

It's like they can't keep track of which countries they're making it in?! So just list them all, LOL

 

[blondie70]

That's something I don't like about Rock Auto...they won't give the country of origin of their parts !

 

[petethepug]

Pretty sure R/A realized they could state what the country of origin was stated to be, but it would only be as effective as those poor employees at a Colombian airport tasked with inspecting luggage for contraband.

 

[opfor2]

well so I thought this p219A was solved but apparently not. It reared its ugly head again!!!!! Would my AirAid Modular Intake Tube, #200-996 course this issue? The reason I ask is that the GM service manual states to inspect the air induction system for modified damage leaking or restricted components and the AirAid MIT is a modification.

 

[j91z28d1]

I don't remember the exact fault code but wasn't there a south main auto video or him going to the junk yard to get a factory air box setup for something like this?

 

[j91z28d1]

 

[opfor2]

Well I did replace my upstream O2 sensors about a year ago BUT I used Denso’s not OEM GM I will get new OEM’s and see what happens

 

[opfor2]

Well I did replace my upstream O2 sensors about a year ago BUT I used Denso’s not OEM GM I will get new OEM’s and see what happens

Update: So, I replaced the AirAid Modular Intake Tube, #200-996 back to stock and ordered two new upstream Genuine GM # 2133866 O2 sensors from RA. I sure hope this solved the P219A issue.

 

[opfor2]

UPDATE 2: yesterday I replaced the "aftermarket" Denso O2 sensors with OEM GM O2 sensors also made by Denso. First photo shows the new GM O2 sensor, second photo shows the removed "Aftermarket" sensor and the third photo shows both side by side new on the left and old on the right. I hope this fixes my P219a DTC

 

[j91z28d1]

interesting