2007 V6 Camry Ignition Problems :(

[repocop]

Hi folks,

I'm getting Codes: P0300-306 (Misfires) and P0356.

I have researched the definitions of these codes and see that P0356 indicates an ignition coil failure on coil "F" (which would be Cylinder 6?)... but how is it possible only one coil is failing but i'm getting multiple/random misfires on all cylinders?

I've looked at the wiring diagrams and the only place that I can see a "single point failure" that can cause such a thing, would be the ECM itself... God forbid!

Anyone have any experience with this sort of issue on our cars?

Please help!

[Redline_Me]

Could be your distributor.

[Pawel062]

i say go to dealership. should be covered under powertrain.

[njerald]

Could be a number of things.

That's why there are diagnostic procedures in the Factory Service Manual....

• Open or short in engine wire harness
• Connector connection
• Vacuum hose connections
• Ignition system
• Injector
• Fuel pressure
• Mass Air Flow (MAF) meter
• Engine Coolant Temperature (ECT) sensor
• Compression pressure
• Valve clearance
• Valve timing
• PCV valve and hose
• PCV hose connections
• Air induction system

• ECM

• Ignition system
• Open or short in IGF1 or IGT circuit (1-6) between ignition coil and ECM
• No. 6 ignition coil

• ECM

[BlackCamSe]

Originally Posted by Redline_Me

Could be your distributor.

Our engines don't have distributors. Haven't since 2002

[repocop]

I suppose it's worth a shot with powertrain warranty, i'm still about 6k away from the limit on that.

I know they are real assholes about what they will and won't repair on the powertrain warranty tho, and will try and find a way out of it more often than not...

We'll see I suppose.

[JohnGD]

Yeah. Go to the dealer and get it fixed for free. That's what warranties are for.

Originally Posted by repocop

Hi folks,

I'm getting Codes: P0300-306 (Misfires) and P0356.

I have researched the definitions of these codes and see that P0356 indicates an ignition coil failure on coil "F" (which would be Cylinder 6?)... but how is it possible only one coil is failing but i'm getting multiple/random misfires on all cylinders?

I've looked at the wiring diagrams and the only place that I can see a "single point failure" that can cause such a thing, would be the ECM itself... God forbid!

Anyone have any experience with this sort of issue on our cars?

Please help!

[JohnGD]

I don't if there is an unwritten policy to wiggle out of warranty claims and make owners fight for repairs, but if you have a problem they should fix it. Otherwise talk to the Toyota 1-800 service line.

Originally Posted by repocop

I suppose it's worth a shot with powertrain warranty, i'm still about 6k away from the limit on that.

I know they are real assholes about what they will and won't repair on the powertrain warranty tho, and will try and find a way out of it more often than not...

We'll see I suppose.

[Redline_Me]

Originally Posted by BlackCamSe

Our engines don't have distributors. Haven't since 2002

Really? Yeah i don't know our engines at all, that's why i haven't touched it.

I'm used to work on older Honda engines.

[njerald]

Originally Posted by Pawel062

i say go to dealership. should be covered under powertrain.

A better statement - A slight chance it might be covered.

[repocop]

After round one, they said they could not complete diagnosis because I had an aftermarket air cleaner that was "letting in too much air" and that there are "a couple vacuum hoses plugged up"... and this is causing the random/multiple misfire codes.

The vacuum hoses that control the flapper door in the bottom of the stock airbox to open and close the upper and lower intake holes... aka, nothing that has anything to do with the ignition system.

I explained as politely as I could that the intake has been on the car since September of 2006 and has driven over 50K miles without incident until last week, and that I don't buy that the intake is the cause of my misfire issues.

There was no mention of the other codes...

[BlackCamSe]

Originally Posted by Redline_Me

Really? Yeah i don't know our engines at all, that's why i haven't touched it.

I'm used to work on older Honda engines.

yea, the ignition and crap is all computer controlled. Each spark plug has its own coil too. To the OP, maybe one of your coils is bad. Try swapping them around and see if the code changes from cylinder 6 to what ever cylinder you put the coil on.

[repocop]

I gather thats what the dealer did.

They say the coils themselves aren't covered by warranty as they're a part that wears out with normal use.

Since it's COP and I know coils DO wear out with use, I bought the story and am paying the 200 to get it fixed. (THis is a job I can do myself but they were going to charge me 100 for the diagnostic, and the part i know is 80 from the autoparts store, so why not pay 20 and have the work done by someone other than me? heh

Anyhow, mystery solved I guess.

[JohnGD]

Check your owner's manual. The coil should be covered under emissions warranty.

Time-wise you're good, but mileage-wise you may be out with Federal warranty. California PZEV have 15-year/150K miles!

Originally Posted by repocop

I gather thats what the dealer did.

They say the coils themselves aren't covered by warranty as they're a part that wears out with normal use.

Since it's COP and I know coils DO wear out with use, I bought the story and am paying the 200 to get it fixed. (THis is a job I can do myself but they were going to charge me 100 for the diagnostic, and the part i know is 80 from the autoparts store, so why not pay 20 and have the work done by someone other than me? heh

Anyhow, mystery solved I guess.

[njerald]

Originally Posted by JohnGD

Check your owner's manual. The coil should be covered under emissions warranty.

Warranty Info is not in your Owners Manual......

You better read your own Warranty Information Booklet before giving out faulty opinions.