P219A Engine Code

Looking for help with this code. 2014 Trail with 120K on it. Took in for a check engine light, trac off, multi terrain select off. Dealer said it needed a tune up, did that. Code came back days later, took back in, they had it all day and then said it failed a compression test and needed a new engine. No rough running, smoke, etc. I took to a local shop (without telling them what the dealer said) they said it needed new upstream O2 sensor on that bank. Had that done, mentioned what dealer said and asked them to do a compression test and he said it came back normal. Swapped sensor, drove about a week, same lights and code. Took it back to them and they had it about 4 days, did another compression test (normal) and they swapped the mass air flow sensor... got back 2 days ago and the light is back on. It's starting to get ridiculous. This mechanic said that with a normal compression test, a leakdown test is unnecessary overkill. Any thoughts or someone with the same issue? My old 4runner had a blown head gasket at one point and you could feel and hear something wrong as soon as the engine turned over. Nothing about the way this car is running would make me think something is seriously off. Not burning oil, fuel economy normal, etc.

 

A quick search revealed this.

"A code P219A should be categorized as severe and rectified as quickly as possible"

https://www.obd-codes.com/p219a

 

From the same source as above
“Causes for this code may include: Engine vacuum leak (large) Defective oxygen sensor/s Burnt, chafed, broken, or disconnected wiring and/or connectors Engine exhaust leaks A faulty mass air flow or manifold air pressure sensor Bad fuel pump or clogged fuel filter”

Sounds like it might be worth taking time to look carefully around the engine for obvious damage to hoses, wires, etc. Rodent damage possibly?

 

Makes me wonder if either of the shops ever took the time to research the code and it's recommended fault checks. but my best guess is no.

 

Totally unrelated, but when the dealer said it needed a tune up, what exactly did they do? What itemized things were replaced, or adjusted? Did they also replace spark plugs?

 

It's a sad commentary that's repeated day in and day out in all facets of automotive and motorcycle repair, these days. For the most part, gone are the days of real troubleshooters and repairmen. We're in a day and age of R&R at the customer expense until we finally get it right. Sad!

 

I just hope that tune up didnt include carburator fuel mixture adjustments, valve adjustment, ignition points etc

 

Dealer tune up. It was likely nothing more than adding a fuel additive and charging the customer hundreds of dollars.
Am I cynical when it comes to trusting mechanics - dealers or independents? In a word........yes!

 

At least in the traditional use of the words “tune-up”, most living people understand that to include spark plugs. That is about the the mileage that they would be due. Which I think may be piece of the larger puzzle here.

So hopefully the OP can cross spark plugs as a cause, if they were replaced....

btw, I think the words “tune-up” should be barred from the language. Probably the most meaningless words in the post 2000 automotive world.

 

When the dealer had it they replaced the spark plugs. None of the other items were included. There's no visible damage to the wiring that I could see or that the independent shop found. On Friday I got it back (again!) and this time the independent guys said they swapped the upstream O2 sensor from the bank 1 side to the bank 2 side to see if it's a faulty sensor.... hopefully this is it, no codes so far, but it had been taking around 100 miles of driving, so I'm coming up on that quick.

 

^seems smart, i think you'll get another code back:
When a code P219A is stored, it means that the powertrain control module (PCM) has detected an air to fuel ratio imbalance for the bank of the engine which contains the number one cylinder. In order to monitor the air to fuel ratio for each engine bank, the PCM uses data input from heated exhaust oxygen sensors (sometimes called air fuel sensors).

Read more at: https://www.obd-codes.com/p219a
Copyright OBD-Codes.com