Help needed P0301, P2237, P2240 (1 Viewer)

[TimCFJ40]

I’m on the road and a long way from home and my 2008 has been flawless until this afternoon. It started stumbling on the 5-6 downshift. Manual shifting seemed to stop this from happening, but then it got much worse, and then the 4Lo, Check Engine, and VSC lights came on. When I pulled into town, it got worse and would run really poorly. I pulled the codes and I get:
P0301 - cylinder 1 misfire
P2237- 02 sensor bank 1
P2240 - 02 sensor bank 2

It started somewhat shortly after a fresh tank of fuel.

Any ideas?
I restarted with the cleared codes and it was not stumbling like it was right when I turned it off.

I’m almost 1/2 way through the last tank of fuel, so I’m going to add some new fuel to see if I got bad gas.

My other thoughts are coil or plug #1?

Any help appreciated.
Thanks!

 

[TimCFJ40]

Also I’m in Jackson WY, so if I can’t rectify this, a mechanic recommendation could be helpful too.

 

[grinchy]

another member had a coil issue with p0301

 

[montegofd3s]

I had this problem a few months ago also on a trip. Right when I pulled out of a gas station after filling up (like immediately) it started stumbling on its face and running rough. I pulled the codes (can't remember them exactly) and it was a misfire in 2 different cylinders and an O2 code. I limped to the nearest O'Reillys and bought 2 spark plugs, 1 coil (only had one), and 2 cans of seafoam fuel treatment. I replaced the spark plugs in the parking lot and dumped in the fuel treatment in. After a code clear she ran fine. I just threw the coil in my tool drawer just in case, but I did replace the other 6 spark plugs when I got home. I would start with fresh fuel and maybe a new spark plug. They are easy to change except number 8 (rear passenger).

 

[TimCFJ40]

Resolved! Drove the hour into Jackson with the shudder. Replaced #1 coil pack in NAPA’s parking lot and cleared the codes. Over the hour drive back not a shudder. Thanks for the input! Back to the fun !

 

[liv2bike]

Resolved! Drove the hour into Jackson with the shudder. Replaced #1 coil pack in NAPA’s parking lot and cleared the codes. Over the hour drive back not a shudder. Thanks for the input! Back to the fun !

I just sent you a PM. I see y'all are traveling with mountain bikes. If you're still in/around Jackson and Teton Valley, ya gotta spend a day up at Targhee. Some of the best mountain biking around these parts. Most everything is open and trails for all ages and skill levels. Cheers!

Guy

 

[TLC2013]

Glad you were able to sort this out. Well done. How many miles were on the ignition coils? Keeping an extra coil on hand is something I have been meaning to add to my tool kit.

 

[TimCFJ40]

Glad you were able to sort this out. Well done. How many miles were on the ignition coils? Keeping an extra coil on hand is something I have been meaning to add to my tool kit.

Based on the records I have on this truck, I’d guess they were original, so 259k. I had to settle for a Napa branded (I think Denso manufactured) coil, which didn’t look quite like the OEM one I pulled out. I may buy an OE coil to replace when I get home and put this one in my kit. The good news with these coils is they cross over to 5.7l Tundras so I doubt you’re ever too far from one in stock. That said I could have used one last night in camp vs the two hours of driving this morning. As I’m sure you know they are VERY easy to replace.

 

[TLC2013]

Based on the records I have on this truck, I’d guess they were original, so 259k. I had to settle for a Napa branded (I think Denso manufactured) coil, which didn’t look quite like the OEM one I pulled out. I may buy an OE coil to replace when I get home and put this one in my kit. The good news with these coils is they cross over to 5.7l Tundras so I doubt you’re ever too far from one in stock. That said I could have used one last night in camp vs the two hours of driving this morning. As I’m sure you know they are VERY easy to replace.

Very cool, 259k, that’s great to hear for the OE coils. I just hit 110k so I got a long long way to go to catch you. Good point about them crossing over to the tundra 5.7. Sure makes part availability easier. My commuter Hyundai couldn’t even make it to 100k before eating the ignition coils twice…pitiful. I replaced my 200’s plugs at 100k and will do the coils the next spark plug change.

 

[04UZJ100]

Based on the records I have on this truck, I’d guess they were original, so 259k. I had to settle for a Napa branded (I think Denso manufactured) coil, which didn’t look quite like the OEM one I pulled out. I may buy an OE coil to replace when I get home and put this one in my kit. The good news with these coils is they cross over to 5.7l Tundras so I doubt you’re ever too far from one in stock. That said I could have used one last night in camp vs the two hours of driving this morning. As I’m sure you know they are VERY easy to replace.

Definitely replace with OEM.

 

[TimCFJ40]

UPDATE: I wanted to add this to the dialog for future searchers/reference. I didn’t replace the plug the first time because the coil resolved the symptoms. About 1000 miles later the replacement coil died. This time I pulled the plug and it was wasted. I had already planned a fresh set of plugs when I got home, but that’s definitely on the top of the list now. I haven’t changed them myself, so I should have done them already, but it’s possible they’re original… That was the next thing on my baselining list.

So, moral of the story is, check your plugs if you replace coils.

 

[Tex68w]

Wowzahs, those plugs are toast. It might not be a bad idea for all of us carry a spare coil just in case.

 

[CharlieS]

I ordered a spare coil to carry after reading this thread.

 

[montegofd3s]

UPDATE: I wanted to add this to the dialog for future searchers/reference. I didn’t replace the plug the first time because the coil resolved the symptoms. About 1000 miles later the replacement coil died. This time I pulled the plug and it was wasted. I had already planned a fresh set of plugs when I got home, but that’s definitely on the top of the list now. I haven’t changed them myself, so I should have done them already, but it’s possible they’re original… That was the next thing on my baselining list.

So, moral of the story is, check your plugs if you replace coils.

View attachment 3049198

Yeah, those are brutal man. Good to see you got to where you needed to be, and thanks for reporting back as some forget the update part of their threads. That always helps mudders in the future.

 

[TimCFJ40]

Yeah, those are brutal man. Good to see you got to where you needed to be, and thanks for reporting back as some forget the update part of their threads. That always helps mudders in the future.

I think the long life of spark plugs these days makes us (me anyways) take them for granted and forget them. I’m home, and the new plugs are due before the weekend. Hopefully I’ll get the time to swap them. I’m very curious if they’re all this bad. If so it’s safe to assume they have 261k (now) miles on them