12-09-2017, 09:58 PM
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#1
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Junior Member
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Join Date: Feb 2016
Location: Pearl, MS
Posts: 21
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Junior Member
Join Date: Feb 2016
Location: Pearl, MS
Posts: 21
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2015 P0306 code for #6 misfire
2015 with 63K miles and idle's real rough all of a sudden. We have had a huge temperature drop over the last few days and I haven't driven it that much. The truck gave me the check engine light and P0306. Surely it's not a blown head gasket. Any other 5th Gen 4Runners with the same issue? After searching all I can find is 4th Gen's and older.
I just replaced the battery tonight and it's still hesitating, idling like a sewing machine. Tomorrow I'll pull the #6 coil pack and see if theres any obvious signs.
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2015 TRD Pro / Inferno / N-fab step bars / Llumar 35% / Southern Style Outdoors Slimline Front Bumper
Last edited by Inferno PRO; 12-10-2017 at 12:08 AM.
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12-10-2017, 08:10 AM
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#2
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Elite Member
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Join Date: Mar 2010
Location: Illinois
Posts: 6,046
Real Name: Um, Phil?
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Elite Member
Join Date: Mar 2010
Location: Illinois
Posts: 6,046
Real Name: Um, Phil?
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Better check for rodents.
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2010 Blizzard Pearl SR5/P - traded
2018 Superwhite SR5/P ... IS350 retrofit.
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12-10-2017, 10:34 AM
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#3
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Senior Member
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Join Date: Feb 2014
Location: Texas
Posts: 3,991
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Senior Member
Join Date: Feb 2014
Location: Texas
Posts: 3,991
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10 bucks on Rodents, injector harness...
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2011 SR5 4x4, Magnuson Supercharger, ICON ET coil overs, MT ICON LT rear, MT offset lower links, URD Y-Pipe, TC UCAs, Baja Rack, MT Sliders, RCI Aluminum skids, 4.56 gearing with ARB lockers front and rear. 305/70 Goodyear MTRs (34") on Konig Countersteer 17x8. Addicted front bumper, Custom undercover tube protection rear. LT font or SAS going on next.
1989 Hilux - 22RE, SAS, hydro assist, Full Exo cage, dual ultimate cases, RCVs, 529s w Detroit locker rear + ARB front, Diamond Axle, bead locks, 40s.
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12-10-2017, 11:22 AM
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#4
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Senior Member
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Join Date: Sep 2013
Location: YouTah
Age: 55
Posts: 3,337
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Senior Member
Join Date: Sep 2013
Location: YouTah
Age: 55
Posts: 3,337
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Agree with the first two consensus...
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2013 TE w/ KDSS Nav
=-> Get yer Custom "Trail" Edition Emblem/Badge 3d Print here! or maybe you just want to go "Pro"
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12-10-2017, 12:20 PM
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#5
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Member
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Join Date: Aug 2016
Location: Eleanor, WV
Posts: 210
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Member
Join Date: Aug 2016
Location: Eleanor, WV
Posts: 210
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Quote:
Originally Posted by jrandom
Agree with the first two consensus...
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Holy hell, is that real?
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2016 Nautical Blue T4R TEP w/KDSS, Oil Filter canister upgrade, Eibach Pro Truck lift 2.75/1.0, JBA UCAs, XD Machete 17X9 Wheels, Falken Wildpeak 275/70/17.
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12-10-2017, 12:34 PM
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#6
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Senior Member
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Join Date: Sep 2013
Location: YouTah
Age: 55
Posts: 3,337
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Senior Member
Join Date: Sep 2013
Location: YouTah
Age: 55
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Quote:
Originally Posted by northcoast
Holy hell, is that real?
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Image search “rodents in engines” or similar. I have had three cases of rodents, two mice and one pack rat, chewing up my wiring/engine compartment over the years, always when visiting family in backwoods Idaho. My sister-in-law had her 2015 Subaru Impreza nuked when she left it at the trail head for two days, she came back and it wouldn’t run smooth or steer proper, $4500 later a new full engine harness, she sold it for a Crosstrek. I now leave my hood cracked and put magic tree pine air fresheners in the engine compartment, knock-on-wood no issues to date.
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2013 TE w/ KDSS Nav
=-> Get yer Custom "Trail" Edition Emblem/Badge 3d Print here! or maybe you just want to go "Pro"
Last edited by jrandom; 12-10-2017 at 12:38 PM.
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12-10-2017, 02:16 PM
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#7
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Junior Member
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Join Date: Feb 2016
Location: Pearl, MS
Posts: 21
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Junior Member
Join Date: Feb 2016
Location: Pearl, MS
Posts: 21
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Rat/mouse it is
After switching the #6 and #3 ignition coils only to have the same code I decided to search a bit deeper. If I can get the pictures to load you’ll be able to tell that a mouse was the culprit of some chewed wires.
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2015 TRD Pro / Inferno / N-fab step bars / Llumar 35% / Southern Style Outdoors Slimline Front Bumper
Last edited by Inferno PRO; 12-10-2017 at 02:31 PM.
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12-10-2017, 02:33 PM
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#8
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Junior Member
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Join Date: Feb 2016
Location: Pearl, MS
Posts: 21
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Junior Member
Join Date: Feb 2016
Location: Pearl, MS
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Another view.
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2015 TRD Pro / Inferno / N-fab step bars / Llumar 35% / Southern Style Outdoors Slimline Front Bumper
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12-10-2017, 02:57 PM
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#9
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Member
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Join Date: May 2012
Location: Stuck in an electric mountain trap in the Pyrenees or Mars, or Spokane WA.
Posts: 577
Real Name: Dark Lord Xenu
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Member
Join Date: May 2012
Location: Stuck in an electric mountain trap in the Pyrenees or Mars, or Spokane WA.
Posts: 577
Real Name: Dark Lord Xenu
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Quote:
Originally Posted by Inferno PRO
Another view.
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Your comprehensive insurance should cover the repair. Unfortunately, this is a common occurance. Honda sells rodent proof tape for anyone looking to prevent this.
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Greg's mother wishes she had aborted him.
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12-10-2017, 03:34 PM
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#10
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Member
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Join Date: Oct 2016
Location: Oxnard
Posts: 819
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Member
Join Date: Oct 2016
Location: Oxnard
Posts: 819
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Quote:
Originally Posted by Inferno PRO
After switching the #6 and #3 ignition coils only to have the same code I decided to search a bit deeper. If I can get the pictures to load you’ll be able to tell that a mouse was the culprit of some chewed wires.
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It’s not hard to find a new connector at your local parts store and replace it yourself, if you’re looking to save some money. There’s a lot information on here on how to move the intake if you search. It’ll should take you a couple of hours to get it done. Best of luck to you
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06-28-2023, 01:48 AM
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#11
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Member
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Join Date: Oct 2013
Location: san diego
Posts: 133
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Member
Join Date: Oct 2013
Location: san diego
Posts: 133
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I got the same code on our 2010 SR5 (v6 obviously). Truck had been running perfectly, and then all at once, it ran horribly and through the P0306 code. I pulled the coil on Cylinder 6. It had signs of rust and gunk. I pulled the spark plug and it was black. I cleaned off the coil best I could. Tried to wipe out the spark plug hole and then cleaned up the spark plug. I had purchased a new coil from Toyota but I got the wrong coil. It was for a 2010 Tundra with the V6. The coil was too large to fit in the spark plug access hole. I put the Plug 6 coil on Plug 4 and put the Plug 4 coil on Plug 6. started it up and it ran perfectly. Cleared the code and it runs like new. Hopefully, Toyota will swap the coil for a new one. I noted that the coil on Plug 6 had a slightly larger than hairline crack down about 80% of the length of the coil.
I had done a cleaning of the engine bay and maybe water got through the coil seal and sat in the plug access hole. I thought that it would have evaporated with the heat of the engine. The engine bay, and the rest of the truck was incredibly filthy when I got it. (this 4runner had been stolen and run through the desert, either running drugs, it was covered in pot when I got it or those without passports (illegal aliens) across the border.
Hopefully we get it back from the paint shop this week. Thanks again for this great Forum. Tons of info. Phil
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