Misfire and/or Check Engine Light Due to Failed Ignition Coil on Toyota Camry

On higher mileage vehicles, an engine misfire may develop and/or the Check Engine Light may illuminate due to a failed ignition coil. It is not uncommon to replace all the coils when the first one fails in order to prevent return trips to the repair shop.

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Average mileage: 134,458 (13,300–215,000)
10 model years affected: 1997, 1998, 1999, 2000, more2001, 2002, 2003, 2006, 2007, 2008
39 people reported this problem
23 people shared problem details
2003 Toyota Camry144,000
Check enging light started flashing, car started to shake just a little as if it was going to shut down. Smoke coming out the tail pipe, and won't pick up speed.
Misfire in cylinder 2 & 3 causing p0302 p0303 also a random misfire p0300 I do have high mileage 187k
Do not pay a mechanic to replace these coils, it is two nuts and one bolt to do it yourself. Remove the plastic cover over your engine block (where you put oil in the engine, it is two 10 mm nuts), underneath you will find your coils, either four or six depending on whether or not your engine is 4 or 6 cylinder. The bolt in the coil is 10 mm also, as you look at the coils they are numbered from left to right, #1 coil is all the way left if you are facing the engine. Unplug the wire harness from the back of the coil, pull up on it and it pops right out (your spark plugs are underneath it FYI if you want to change those yourself also, one plug under each coil). So with a 10 mm wrench, about $100 for the part and 5 minutes of your time you can do this yourself. Sorry to all of those that were fleeced by mechanics. $300...sheesh!
1999 Toyota Camry198,000
My car started to shake and the check engine light comes on and off what can be the problem I took it to a mechanic and he put it on a computer the computer says misfire on a number 3 spark plug
I have had all the ignition coils replaced twice and some three times in the last two years and am continuing to still have problems. The check engine light will come on and it will die without notice or will run rough. Each time is taken to the mechanic it is the ignition coils and usually only one cylinder each time.
2007 Toyota Camry75,000
So far I've had 2 coils replaced and now it's only about 2 months later I'm getting another reading that another coil has failed. Never had this problem with any of the other cars I've ever owned for over 30 yrs. Back to the dealership tomorrow and feel they should fix this problem once and for all at their expense. If these coils are defective, then Toyota should foot the bill!
2003 Toyota Camry13,300
2002 Toyota Camry167,000
Car started to skip and use alot of gas, diagnosis check revealed it needed ignition coil replaced and mass air flow sensor. Solved some of the skipping, but has not really fix the problem.
2007 Toyota Camry125,000
I have had multiple failures of the ignition coils since I've owned this car brand new in 2006.
1998 Toyota Camry150,000
First The check engine light...then it started to lose power..now it doesn't even want to move it goes really slow... Many other cars have the same problem but people don't look for solutions online
1998 Toyota Camry155,000
Drove car last nite perfect today engine started shaking the motor and exhaust
1998 Toyota Camry55,000
The car had previously been serviced 3000 miles before, and this is second time the check engine light went on. The OBO device showed the code problem as P0300, P0302, P0303. The car is not driven that much, so it was suspected that maybe the gas in the car was gummy, or caused internal parts to be clogged. Previously, the spark plugs had been replaced, as well as the spark plug wires.(@ 3000 miles ago) Mechanic indicated that upon removal of the sparkplugs, cylinder # 3 spark plug was dirty and burned and ignition coil looked bad. This is after 3000 miles of driving. So he recommended replacement of the ignition coil. I do have to say that the car is 15 years old, so at that age, I can see that a lot of the car's parts are beginning to fail as they probably have a lot of dirt on them, and if they are plastic, probably the age and heat in the car is means they crack etc.
2002 Toyota Camry167,000
All of a sudden lots of vibration. Thought it was the road at first but then started losing power. Made it home and to repair shop but it felt very wrong to drive it like this. Replaced just the bad coil. $300
2007 Toyota Camry120,000
This is my third trip to the dealer to replace an engine coil. I was unaware that this is a problem with the 07 Camrys. I have an 02 camry and never had to replace a engine coil.
2001 Toyota Camry178,000
fire code P0300, P0302, P0303
2008 Toyota Camry129,000
First trip to mechanic had all spark plugs and one front ignition coil replaced. 2nd trip to mechanic, another front ignition coil replaced. This morning the check engine came on and same idling issues, I know it's another coil issue. Is it recommended to just have them replace all the older coils at this point? Or just wait for them to blow one by one?
This has happened twice now and I am getting ready to pay the mechanic a THIRD TIME to repair the back coils that are "hidden". They have to take the car manifold out to replace them. Very very poor design on Toyota's part and I can honestly say makes me not want to buy a Toyota again. Prior times we only replaced the damaged coil but this time I will replace all three of the back ones in the hopes that solves the problem.
2007 Toyota Camry154,000
Replaced all coils with off market onces, then one went bad again. Come to find out my Camry only takes the coils from the dealership. Fixed all 4 now I have no problem with it & they are under warrenty
1997 Toyota Camry215,000
cylinder 1 misfire/ bad ignition coil
2006 Toyota Camry144,000
I just purchased the 06 Camry about 2 months ago. The check engine light came on - dealership took it to Toyota and apparently just had it reset. It came back on a week later. I took it to Toyota myself (also to see what the prior code was). Supposedly the prior code had something to do with the fuel mixture and the code I had the 2nd go around was an ignition coil. It was one of the "back" coils which they said required a lot of labor to get to - they suggested I replace the plugs at the same time to avoid the labor to do that at a later date.) $500 bill. The check engine light still comes on every few days (normally while idling) after a day or two it resets. The only saving grace to that $500 bill is that they cracked my windshield while replacing the ignition coil. The windshield had a tiny chip in it I hadnt noticed when I purchased the car - so at least i got a whole new windshield ($288) out of the $500 ignition coil repair bill. NOW if I could just figure out why the check engine light comes on when Idling!
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