Another 2017 with P11EE code

Finally got mine back from the dealer after 3 weeks. Burnt exhaust valve, cylinder 1. Replaced the head. Advisor said there was another one that just came in with the same P11EE code. That's 4 that I'm aware of at this dealer in the last month. Advisor would not guarantee the other head would not have the same issue. Thankfully I have an extended warrantee just in case. That is if I decide to keep this truck. The Ram 2500 rental they gave me was a really nice truck.

 

New to me. 2018 - Tacoma - #3 VIN - 95,000 miles (may have had a repair previously based upon receipts I saw at purchase)

Mine is intermittently coding P11F0. No other codes. Garage reader says rough idle, but I don't get a code for that. Based on reading from this site I had compression done on cylinders 3 & 5 and results were not stellar, but cylinders were within 3 lbs. of each other. #3 is not coding so I assume #5 compression is OK too. I have periods when the time between codes clears is enough, they go off the permanent code list.

I run Bluedriver OBD reader so I can log and clear the codes mainly because I use cruise control except when in traffic.

The code snapshot from Bluedriver shows a ridiculously high fuel pressure on Fuel rail A of the high-pressure system. Bluedriver lets me monitor that live and shows commanded versus current fuel pressure. Most of the time the pressure commanded, and current align, but at idle and lower loads the actual can be substantially higher (I have seen as much as 3,000 when commanded was less than 400). Makes me wonder if that has something to do with the coding.

Fuel pressure B is always within a few lbs. Fuel trims look fine.

Anyone else monitored their fuel rail pressures and seen something similar?

As part of trying to remedy this I have been running fuel treatments and installed a catch can. I suspect valve deposits may be part of the issue. If those are not managed or remedied long term, I suspect they will be a problem.

 

I looked at toyota PIDs and there are no PIDs for each bank. You are getting Generic PIDs reading that could be misleading.

 

had the problem with my 2019, saw the high fuel pressure and hooked up to new truck and fuel pressure was the same, long story but mine was engine problem with cylinder #1 need to do leak down or very careful compression test of all cylinders

 

Toyota PID for that is Target Fuel pressure High and it is the same value at idle 343.6 on Port injection mode
It is about 1000 at Port+DI injection Mode
So looks normal.

 

I don't think it is reading pressure on banks. I think it is reading pressure for the direct injection system (Rail A), and port injection (Rail B). That is my guess. I'll post a photo of the two on one screen next time I have it warmed up. The Rail B system is always on the money. The Rail A system wanders quite a bit at idle and lower RPMs. That is also when my P11F0 code seems to turn up most frequently.

I read that one way to check injectors was to over/under pressurize them to cause a fault. Overpressure would cause a leaker to go rich, under pressure would cause one clogged to go lean. If my cylinder five has a leaker the high pressure might be goofing up the fuel mixture causing the code. Of course, a burned leaking valve might do the same:-(

I appreciate you guys for chiming in.

 

Rail A is Toyota's High, B -low.
Add injection mode to the monitor and you'll see why it is fluctuating on Rail A. Also add High pressure Fuel pump duty and it is spiking as soon as Injection mode go from port to Either (Port+DI).
Your posted hunters are the same as mine on the cold idle. Bottom rows
Can you get a freeze frame when the code is set?

 

so I browsed through my logs and found similar idle condition. I could not export the data to a file from Techstream.
The only item stands out is LFT B2 value.
Mine have been sitting in minus for many many miles. This is data when truck had 19K miles
O2 B1S2 do look a bit different. See if you spot something else.

 

That's a lot of work you did there. Thanks for sharing. There is a tech on youtube who goes over fuel trims. I didn't see anything in mine that gave me pause. The 12,000 psi fuel rail pressure A got my attention though.

What version of Techstream are you running? I think I may try and get that too. My BlueDriver or others are handy because it is running on my phone. I can clear the codes on the fly. If something different pops up I have to get to a WiFi connection to save the freeze frame report. Once the code is cleared it is gone.

Will Techstream allow you to print the report? If it is Excel you may be able to print to pdf and save it as a file. That would be a lot less work.

Unless Toyota does a recall for all owners burned valves will be on my dime. I doubt I would do one side on an engine with 95,000 plus miles. That makes no sense. If I can manage the carbon build-up and keep it running as well as it does now, I will not do a top end rebuild. The only way to tell if something is happening is the P11F0 code and slightly rough low idle.

My mechanic is working with me. He sent a Highlander with the same code to the dealer. Dealer said it would require replacement of all the injectors and cost $6,000!!! Don't think I'll be taking my truck there. That's a shot gun approach I don't appreciate...

I'll keep posting as this develops.

 

12.10 . It is up to 2018, but I used it on 2022

Yes, you can do everything in TS.
For some reason the export did not work on that file. I only got headers exported.

 

Resurrecting this thread. I sign up just to report...

2019 Lexus UX250h, 53k miles. Just got the P11EE code today.

I can't seem to find any other car with this code other then a Tacoma.

 

I got the P11EE error code on my 2017 Tacoma Off Road 4WD. Toyotas are pretty damn reliable, so I didn’t believe the code and wanted to investigate further.
The weather in our area was in the low 30s, dropping down to the single digits overnight. I have an unlimited car wash plan that includes the undercarriage and the wheels, so I was my Taco daily. I washed it on a very cold day in freezing temperatures, the next day the check engine light and the Trac Off light came on. Took it to the nearest auto parts shop and had the code confirmed, P11EE.
Concerned that I might have a huge problem on my hands I didn’t wash it or do much to it, only checked and confirmed no oil in the reservoir. After a few days I had the code reset. A few days later still no code and no lights. I washed it again in the freezing weather, just used to it. The codes came back in a couple of days. I started seeing the connection. The Taco drives perfectly well and the only time the code comes up if after I wash in in the freezing weather. Still not convinced, now the temps are in the 40s and 50s. I washed it daily for the past 3 days, still no code, no check engine lights.
there’s nothing wrong with these engines. There’s definitely something wrong with the sensor sending that code. my theory is this. The sensor is very close to the ground and the powerful jets that clean the undercarriage. The wires get wet, water freezes and expands, water gets into the wire seals and expands when it freezes, sensor starts sending erroneous code.
im satisfied there’s nothing wrong with my truck except a bad sensor, oxygen sensor possibly, that I need to identify and replace, and STOP Gergen washing it in freezing weather.

 

This isn't a sensor issue... They confirm high leak down on the the cylinder the code is for before tearing an engine apart. Sorry to say it but I'd imagine you're going to find the same and the carwash is just a coincidence.

 

You were right! Almost a month gone by and now the lights are back with the P11EE Code on my truck. This sucks. I thought Toyotas are 250k-300k mile vehicles! Damn shame!