P2196 after Seafoam valve clean

[Conman50]

Hello y'all!

I did the whole seafoam can treatment like in this video below.



After the treatment, I went for the test drive and shortly after my CEL came on. scanned it with my OBD scanner and I got codes P2196, I cleared it and kept driving a bit and I noticed my auto start/stopr would not work and I got code P164C. I stopped the car, cleared the codes, turned it off and turned it on, then the auto start stop started working again.

Long story short, My CEL is off, but when scanned I still have a permament code P2196 which cant be cleared. How long will I need to drive for this to go away? I just drove for about 15 mins on the freeway and its still there. Also, annoyingly, on my FordPass I now have an annoying notice to take my car in for a service. Hoping this will go away soon too...

Seems to drive a little better, might be my imagination. My truck is stock, 38K Miles. Pretty sure I didnt have these codes before the treatment. I just assume it sucked in too much air through the gap and threw the sensor out of normal spec.

Any thoughts?

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[ctechbob]

Can't help with the code, but I would recommend using a product with PEA if you're going to do valve cleanings. Seafoam doesn't have it. BG and CRC are two that come to mind.

 

[airline tech]

It’s a generic o2 sensor code (Rich) - I would give it a day or so, after a few drives. To burn remaining Seafoam in the system.
It is possibly staying locked in memory till it performs a Catylast Test (self test) ( automatic)
And you are most likely looking at a history code

 

[airline tech]

After thinking for a bit - I think the reason for the code has to do with the PCM adjusting for what it considers a high octane (rich) fuel and should readjust on its own.

 

[Rp930]

What made you want to do this “treatment”?

 

[Jacob]

I wouldn’t use seafoam on newer vehicles. Was designed for carbureted engines. To each their own though.

 

[JasonTremor]

Hope you didn't destroy the catalytic converter. As I recall, Ford specifically advises against these types of treatments due to them damaging catalysts.

 

[JasonTremor]

The p2196 indicates the O2 sensor is stuck commanding full enrichment as I understand. That being said, did you remove any intake hoses to inject the seafoam? If so, double check those hoses to verify you don't have any intake air leaks.

 

[JasonTremor]

One other note. That video shows injecting the seafoam pre charge cooler which explains why he didn't see any smoke. All that seafoam spray is likely condensed at the bottom of the intake cooler and never made it to the engine.

 

[Grandaccess]

What made you want to do this “treatment”?

I know right, 38k its just broke in ...
but then again I runs a gas treatment once a month, I use a different one every time and I only have 19k on my 21
that code should clear itself within a tank
This code indicates there is too much fuel in the exhaust measured by bank 1 sensor 1. Bank 1 is the bank of cylinders that contains the number one cylinder. Sensor 1 is the sensor that is before the catalytic converter.

 

[21Blackout]

As stated above vehicle must run self test for catalyst efficiency full operating temp 3/4 tank or less fuel drive time of 20 mins mixed stop and go and hwy, if it still persists must be cleared by dealer or forscan

 

[yamahaSHO]

The p2196 indicates the O2 sensor is stuck commanding full enrichment as I understand. That being said, did you remove any intake hoses to inject the seafoam? If so, double check those hoses to verify you don't have any intake air leaks.

It's not commanding rich, it's stuck with a rich reading. If anything, it would be trying to lean it out. I would hook up a scanner and see what the O2 is reading in real-time while running to get a better idea. The reason it throws a code is the ECU is seeing a consistent and wide deviation between commanded fuel and actual fuel.

I know right, 38k its just broke in ...
but then again I runs a gas treatment once a month, I use a different one every time and I only have 19k on my 21
that code should clear itself within a tank
This code indicates there is too much fuel in the exhaust measured by bank 1 sensor 1. Bank 1 is the bank of cylinders that contains the number one cylinder. Sensor 1 is the sensor that is before the catalytic converter.

There's only one bank. You have a pre and post cat sensor. The forward sensor monitors engine AFR for closed loop operation, which is full-time in these and the post-cat sensor monitors catalytic converter efficiency. The post sensor can be used to make minor adjustments to engine fueling as well.

 

[Conman50]

After thinking for a bit - I think the reason for the code has to do with the PCM adjusting for what it considers a high octane (rich) fuel and should readjust on its own.

Yea thats what I'm hoping!

What made you want to do this “treatment”?

Good question! I guess just my understanding of how DI engines do not have the fuel air mix cleaning the valves like in a port injection. Also just reading stuff on these forums...nothing like these forums to make you think your transmission will blow, fans will get stuck, or headgasket will start to leak.....

Hope you didn't destroy the catalytic converter. As I recall, Ford specifically advises against these types of treatments due to them damaging catalysts.

I hope I didnt either! The guy in the video didnt seem to report anyu issues, and I didnt even use the full can. I hoinestly think it just has to do with the process if dumping this stuff into the air intake.

 

[Conman50]

Good news!

I went for a drive today and scanned the truck and the permamanet code is gone, no more codes.

Truck seemed to drive fine although I may want to replace that EGR valve like people suggest.

FordPass cleared after about an hour after I drove.

 

[Racket]

Hope you didn't destroy the catalytic converter. As I recall, Ford specifically advises against these types of treatments due to them damaging catalysts.

IIRC the use of additives can void the Ford warranty ?

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