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

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: 118,678 (80,000–204,000)
5 model years affected: 2001, 2002, 2003, 2004, more2008
15 people reported this problem
13 people shared problem details
VSC light on and engine light flashing. Took to Toyota dealer to be fixed. Within 40 miles of having the new coils installed the VSC and engine light are both on. Took back to the dealer they reset codes, but think it may be the catalytic converter for a cost of $3200 (parts & labor)to replace. But after reading information on the website... I'm not sure if they checked the air filter hose connection so will check that first before replacing the catalytic converter.
check engine light on..4 different mechanics offered to install rebuilt engines...some with over 100000 miles for 4000-5000 bucks.one honest mechanic foreign auto worcester ma. james recognized the coil problem and painstakingly went thru entire engine and rep;aced all coils for alot cheaper than what everyone was saying.it took him over 20 hours to do the job....maybe thats why most mechanics take the easy way out
1st time.... Car was driving fine. They just died in the middle of the road. Had to have to towed to the shop. They replaced #1 and the spark plug. $249. 2nd time... A year later. Same thing. 177,000. Car driving fine. Stepped on the gas in the middle of a major interstate and the car died. Managed to get it over to the side without killing myself or anyone else. Towed again. They replaced #3.
Engine running rough first mechanic replaced #1 coil and also ran an engine cleaner thru engine . Within week or two engine running rough again and second mechanic replaced same coil which went bad again
One coil went bad, at 84000 miles. My mechanic told me to replace all four, at same time. Replaced all four, then had 2 more replaced within a year that went bad. Now have another bad, which totals 7 that need replaced within a years time. If anyone would have any answers that would be great. I worked in a factory and understand that quality cannot be perfect all the time.
Two ignition coils went out within a week.
I drive a 2003 Highlander. Engine light went on, car started trembling then it would jerk when I would accelerate. Took it to mechanic came out with an OBD reading of P0355, bad ignition coil #5, replaced it for $120. Car worked fine...for three hours, then, boom! all three came back. Could be all three faulty coils or bad cylinder.
check engine and VSC light on. Car had lost power and was shaking. Took it in and said I needed to replace 1 ignition coil and plug for $250. Hopefully the others will last.
VSC light on, engine light on, repair shop says rodents ate through coils and they have to pull whole engine to repair/replace, parts alone $1400 tot al cost about $3k maybe more. Not sure if worth fixing on a 7 year old car...
We were driving at HWY speed, the check engine light came on, the engine produced a severe shutter (aprox. a 4 cycle very rapid succession) in a total time of one second. It felt as though the engine was turned on and off very rapidly at each cycle. Then the check engine light began to flash for about 10 seconds then stayed on solid. We took it straight to the shop and it logged a PO356 code found to be a bad ignition coil.
Check Engine, VSC and Trac Off warning lights all lit; engine idles rough; code indicates cylinder 3 misfiring. Replaced ignition coil.
Check engine and VSC lights came on. Mechanic replace 6 plugs, rotated coils and replace 1 through process of elimination. Lights were able to be reset and car drove fine in the parking lot. 5 minutes later on the his gbway, check engine and VSC lights came back on, and running rough again. Going g to have to coils replaced at ~$150/EA.
Recurrent ignition coil problems about a year after they have been replaced.
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