What do you consider a "maintenance light" ?
Is the P0304 code gone now.
Can ya post a pic of this "bolt"/ "screw" issue.

 

this is the bolt I screwed in with the air filter box. The p0304 code is gone and haven't came back. The maintance required light came back on though.

 

Not familiar with what your calling a maintenance required light, CEL?
Was thinking more of where that bolt goes vs the part itself but it's a moot point currently without the car throwing a code.
What are you working on, multiple model and years represented in this sub-forum.

 

It's a 2008 camry 4 cylinder

 

Well, a P0304, regardless of year and model (which we now have) is a misfire in cylinder 4, which should have nothing at all to do with the other bits you've described.

And if you had it, cleared it, and it's not yet come back, it almost certainly will. But it's got to "stick" before you can really begin diagnosis in earnest (though in most cases it will be a coil going bad).

 

I am ordering coils and sparks thank you so much. Even if it don't come back I will replace tp be safe.

 

th
This is were I put the bolt in that I believe threw the code. When I removed it. The problem stopped.

 

Coincidence, almost certainly.

Even a slight difference in air flow that would result from sealing a leak should not trigger a P0304.

Put that bolt in (because it should be there, the seal on the air intake box around the filter should be tight) and then proceed from there.

If you get a P0304 again, then it's time to deal with diagnostics with the air intake in the state it should be in to begin with.

 

I'll do the spark plug and coil. In the mean time what is this light for

 

That's basically a trip meter that comes on every 5k miles, reminder to do things like an oil change. Reset is listed in the article.

https://www.toyotaarlington.com/how-to-reset-toyota-camry-maintenance-light/

 

I reset the maintance light and it came off. Now no lights are on. Sparks and coils on the way do you think I should replace fuel injectors too?

 

Just an FYI, Toyotas don't like after-market elecrical parts like sensors,coils etc.
I wouldn't keep throwing parts at it. Injectors rarely fail and I'm doubtful the new coils will change anything due to the lack of a DTC being thrown.
So, is that bolt back in where it belongs and how is the car running now?

 

Can you recommend me a non after market spark and coil from amazon?

 

No the bolts not back in yet. But the car runs fine. Just scared that the moment I put it on I got idle Rev and a code. So im going to order oem coils and sparks before I put that bolt back in.

 

Sicc562- resists the urge to wholesale replace coils/sparks.
Best thing you can do a this point is monitor/record the engine parameters.
Knowing what the engine parameters should be before replacing parts will save you time/money over the long haul.

 

Send me a YouTube video how to do that

 

@Sicc562,

You absolutely, positively need to step away from the "I have a code, let's throw parts at it," approach to maintenance. Some OBD codes are pretty directly indicative of both the area of issue as well as the fix, others, just suggestive. A misfire could be caused by a bad plug, a bad coil, wiring to the coil being compromised, etc. You gain nothing by replacing all coils, plugs, etc., "just because."

You also need to get your Owner's Manual out and read it. (Toyota Manuals and Warranties | Toyota Owners) The Maint Reqd light is discussed in detail there, and as @sdspeed has told you, it comes on to indicate an oil change is needed (if you're using the same type of oil as was prevalent when the car was made. I don't change my oil every 5K miles and haven't for a very long time, but that's the "fixed interval" at which this light comes on solid for a 2004 Solara, it blinks at startup between 4500 or maybe it's 4750 miles and 5K miles since last change, I don't recall exactly).

You are taking a disastrously wrong approach to auto maintenance that will cost you a fortune and gain you little to nothing. A strategic, analytical approach is needed.

 

@Sicc562,

You absolutely, positively need to step away from the "I have a code, let's throw parts at it," approach to maintenance. Some OBD codes are pretty directly indicative of both the area of issue as well as the fix, others, just suggestive. A misfire could be caused by a bad plug, a bad coil, wiring to the coil being compromised, etc. You gain nothing by replacing all coils, plugs, etc., "just because."

You also need to get your Owner's Manual out and read it. (Toyota Manuals and Warranties | Toyota Owners) The Maint Reqd light is discussed in detail there, and as @sdspeed has told you, it comes on to indicate an oil change is needed (if you're using the same type of oil as was prevalent when the car was made. I don't change my oil every 5K miles and haven't for a very long time, but that's the "fixed interval" at which this light comes on solid for a 2004 Solara, it blinks at startup between 4500 or maybe it's 4750 miles and 5K miles since last change, I don't recall exactly).

You are taking a disastrously wrong approach to auto maintenance that will cost you a fortune and gain you little to nothing. A strategic, analytical approach is needed.

I understand and really appreciate your advice. But the car is 138k mi. I purchased it at 115k mi. The previous owner was not mechanically inclined and didn't replace anything. So at this point replacing it all is probably better so I would not need to deal with that problem later. My commute to work is 65 mi a day and 65 mi back. I would rather just replace it as thoes parts have accumulated alot of miles and is probably due soon anyway.

 

A worn out spark plug can cause a P0304. They don't heal...it could have been a loose wire on the cylinder 4 coil. The Maintenance Required light comes on every 5000 miles reminding you to change the oil and look things over, like frayed belts or leaking hoses or leaking gaskets you can fix before oil goes all over the place. You reset the light, so look for it again in 5000 miles. How about changing the oil so you don't have to worry about that again. A set of new platinum or iridium spark plugs would be good. The rest of the things you're worrying about, put your wallet away and rest easy as long as no more check engine lights come on.

 

Ya I had changed the oil 1k miles ago. So far everything is great. But I'm still getting the coils and sparks. Incase it comes back.

 

Fair enough

 

Honestly what I think is, when I put that screw on I might have put it on incorrectly causing an open gap on the air intake box. For one I only put one screw becuase I didn't realize the other one side had a missing one as well. Also I did it in the dark becuase it looked easy. The screw probably wasn't even tight. So when I started the car the next day it wasn't getting air becuase the box was probably slanted and not closed. So after I removed it and made the Box closed as it should it then went away.

 

Welp that code came back. Parts come on Wednesday so we'll see what happens.

 

In the meantime you should swap the coils on cylinder 4 and one of the other cylinders of your choosing to see if the misfire follows the coil. If it does, you have your answer as to what is failing. If it doesn't, it's then most likely either the spark plug for cylinder 4 or the wiring to the coil for cylinder 4, and a spark plug change is the next step.

 

Thank you. I will try that when I get home. I went ahead and order the most expensive coil and spark plug in Amazon using confirm part fitting and that seller is anazon. I hope I didn't shoot myself on the foot but. But I figured even if they don't last long like the ones In auto that's 4 times the price duralast and still aftermarket. I have 4 to replace from that single defective coil. So I won't replace all coil just that one defective one after testing like you suggest.

 

It's funny, but there is a parallel topic right now about a misfire on a different cylinder, but the same engine.

I am the contrarian who says that any good-quality replacement part will do, including for ignition coils. My now sold 1999 Jaguar XJ8L used Denso coils, and I was not impressed with their failure rate.

But you need to take a slow approach, and it sounds like you finally are doing so.

 

I really appreciate your help. That paragraph underneath everything you wrote is hilarious 😂. Read it 5 times before doing what you said.

 

That paragraph underneath everything you wrote is hilarious

It's certainly not intentionally so. I have seen more heartache occur because people who show up asking for help, and having completely wrong-headed ideas, will not listen to what is being offered by individuals who have far more, and deeper, experience than they do.

If you (any you) come here seeking advice, you are not obligated to accept any of if you do not read what's offered, see if there are patterns in the advice offered, and take that into account.

Breezing into a venue like this with a preconceived notion that you want confirmed, and are going to follow-through on whether it's confirmed or refuted, is a waste of everyone's time.

 

The maintenance light came on because your vehicle is approaching the mileage where the next scheduled maintenance is required. For my 04, it's five thousand miles.

 

Kind of off topic but can a harmonic balancer removal tool be used to remove the pully from a power steering pump?

 

Yes if the pulley diameter is withing the range of of the puller.

 

Thank you!!!!

 

Before I even say what I am about to say, I am not a moderator for ToyotaNation, nor am I trying to dictate to anyone what they can and cannot do. I am trying to raise awareness, particularly for new members, and @Sicc562 is one of those.

The default settings for ToyotaNation cause an alert to be sent to the person who wrote any given message if another member applies a "Like" to it, regardless of which style they choose. So if you like a message, the person who wrote it will receive an alert in the form of a small red dot on their avatar in the upper right side of their screen, and then they can see what kind, and on what message, by clicking on their avatar and looking in Alerts. Here is the Account Preferences page where a very long list of checkboxes for when you wish to receive notifications appears.

While I love to be thanked (who doesn't) I always take it as an implicit thank you if the "like" on my message is a thumbs up, "love eyes," or helpful green check, and sometimes the laughing face (where appropriate).

Many are not aware that when they like someone else's message, that someone else will be notified about that unless they specifically turned that feature off.

 

this could be my problem. My coils looked fine.

 

My coils looked fine.

It's already been said that plugs or coils are the two most likely issues, with wiring to the coil being a far less likely third option.

But you are almost never going to see, literally see, anything odd looking about a coil failure. They look perfectly normal when they are perfectly dead, in most cases.