HELP misfiring and other issues :-(

Truck: 2016 Tacoma limited 4wd

History: I haven't driven it for around a month. went to drive it the other day and it had bad misfiring. I had to turn around. The only thing I can think of since then was that we've had a decent amount of rain in norcal and I have a hole in the right rear taillight, i noticed the taillight was full of water covering the reverse light bulb. drilled a hole at the bottom and it's drained now.

Anyway, pulled codes and main issues are random misfire, cyl 3 misfire, cyl 5 misfire, and a few more codes that could be related or not relevant. I'd be surprised if it's as simple as 2 spark plugs failing at the same time. I'm thinking worst case is it's electrical due to the taillight. Could also be squirrel damage since we've had them recently. Just looking for some advice before i start busting things open. Any help appreciated
Full code list below:


Car Scanner ELM OBD2

DTC report

Selected brand: Toyota

VIN:


============1==============

P21D1

Raw code: 21D1

ECU: Engine control unit

Status: Confirmed


============2==============

P21D3

Raw code: 21D3

ECU: Engine control unit

Status: Confirmed


============3==============

P0300

Raw code: 0300

ECU: Engine control unit

Status: Confirmed

OBDII: Random/multiple cylinder(s) - misfire detected

Toyota: Random/Multiple Misfire Detected


============4==============

P0303

Raw code: 0303

ECU: Engine control unit

Status: Confirmed

OBDII: Cylinder 3 - misfire detected

Toyota: Cylinder 3 Misfire Detected


============5==============

P0305

Raw code: 0305

ECU: Engine control unit

Status: Confirmed

OBDII: Cylinder 5 - misfire detected

Toyota: Cylinder 5 Misfire Detected


============6==============

P1605(00)

Raw code: 160500

ECU: Engine control unit #2

Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle

OBDII: Keep Alive Memory Test Failure

Toyota: Knock Control CPU Malfunction


============7==============

P21D1(13)

Raw code: 21D113

ECU: Engine control unit #2

Status: Test failed, Test failed (current drive cycle), Pending, Confirmed, Test failed since last DTC clear, Warning indicator requested


============8==============

P21D3(13)

Raw code: 21D313

ECU: Engine control unit #2

Status: Test failed, Test failed (current drive cycle), Pending, Confirmed, Test failed since last DTC clear, Warning indicator requested


============9==============

P0300(85)

Raw code: 030085

ECU: Engine control unit #2

Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle, Warning indicator requested

OBDII: Random/multiple cylinder(s) - misfire detected

Toyota: Random/Multiple Misfire Detected


============10==============

P0300(27)

Raw code: 030027

ECU: Engine control unit #2

Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle, Warning indicator requested

OBDII: Random/multiple cylinder(s) - misfire detected

Toyota: Random/Multiple Misfire Detected


============11==============

P0300(00)

Raw code: 030000

ECU: Engine control unit #2

Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle, Warning indicator requested

OBDII: Random/multiple cylinder(s) - misfire detected

Toyota: Random/Multiple Misfire Detected


============12==============

P0303(00)

Raw code: 030300

ECU: Engine control unit #2

Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle, Warning indicator requested

OBDII: Cylinder 3 - misfire detected

Toyota: Cylinder 3 Misfire Detected


============13==============

P0305(00)

Raw code: 030500

ECU: Engine control unit #2

Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle, Warning indicator requested

OBDII: Cylinder 5 - misfire detected

Toyota: Cylinder 5 Misfire Detected


============14==============

U0100

Raw code: C100

ECU: BCM #1/Convenience systems

Status: Confirmed

OBDII: Data bus, engine control module (ECM) A - no communication


============15==============

U0101

Raw code: C101

ECU: BCM #1/Convenience systems

Status: Confirmed

OBDII: Data bus, transmission control module (TCM) - no communication


============16==============

U0100

Raw code: C100

ECU: Parking sensors

Status: Confirmed

OBDII: Data bus, engine control module (ECM) A - no communication


============17==============

U0101

Raw code: C101

ECU: Parking sensors

Status: Confirmed

OBDII: Data bus, transmission control module (TCM) - no communication


============18==============

U0100

Raw code: C100

ECU: Entry & start / Smart key

Status: Confirmed

OBDII: Data bus, engine control module (ECM) A - no communication


============19==============

U0100

Raw code: C100

ECU: Power source control

Status: Confirmed

OBDII: Data bus, engine control module (ECM) A - no communication

 

might want to check for chewed wires.

 

Yeah, tree rat....seems to be a common theme around here lately

 

Rodents I bet. Pop your hood and check wires and connectors carefully. lift up the plastic engine cover, It usually tells the story. It should have insulation under it that rodents seem to like..

 

Good ole U codes! Failure to communicate. Go through the engine bay with a fine toothed comb.

 

No one is going to mention the drilled tail light ?

That said ... misfire code on cyl -#5. How many miles on the truck ?

 

well....he said there was a hole in it already....I just supposed an additional drain hole wasn't gonna hurt none

 

you guys are some wizards. i found one yellow wire cut all the way through. some damage on one of the wires next to it. (this is the wire harness underneath the brake fluid reservoir). i stripped and reconnected and i'm resetting the battery to see if it'll fix. I'll also check under the plastic covers tomorrow like someone else mentioned

 

Rodent damage is sometimes covered under insurance depending on your situation-FYI If you find any more substantial damage.

 

i appreciate the advice. yeah i'm reading through other rodent threads now. glad to see i'm not alone, but hope the damage isn't too dramatic

 

Yeah have a good look in the area below the intake manifold.

 

FOUND THE CULPRIT - https://media.discordapp.net/attach...1085123837952/image0.jpg?width=622&height=829

injector 3 harness is totally mauled, and it cut off injector 5 as well. i'm going to try repairing it now - does anyone know if i need to do anything special to prime the fuel rail? my first time working on a returnless, and i lost a fair amount of fuel.

 

repaired the harness and reinstalled. seems to be working fine now. CEL is gone... i'm going to drive it around a bit tomorrow

thanks everyone for the help

 

There's a product I purchased at a Tractor Supply Company called Fresh Cab and it's supposed to keep rodents out.
Seems to work, but then I've also bought a jug of Tom Cat rodent repellent. Between the 2 of them knock on wood so far so good.
Main problem here is field mice though not squirrels.

 

The 5 gallon bucket works great, you can make your own basically free. If you have freezing temps you could add antifreeze to the water.