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08-04-2018, 01:13 PM | #51 |
Scooby Newbie
Member#: 454822
Join Date: Sep 2016
Chapter/Region:
NESIC
Location: Rhode Island
Vehicle:2013 WRX Hatch White |
I also have this random misfire issue in my '13 wrx. For me it happens every 400-2000 miles or so, and it's the same random misfire in different cylinders.
Soldered all the contacts in the marked areas just to be sure. There was this guppy black sticky crap that someone stupidly put in there, some kind of sealant. It was all around the wires and even looked to be possibly breaking contact inside the crimps. I cleaned them and soldered the wires correctly, sealed them too. After about 1200 miles, sure enough the check engine light popped on, with slightly rough idle, same code. I did a leak down test, then a compression test, which both seemed to be normal, with compression being even throughout the 4 cylinders. Any ideas?
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08-24-2018, 01:30 PM | #52 |
Scooby Newbie
Member#: 344431
Join Date: Jan 2013
Chapter/Region:
BAIC
Location: Bay Area
Vehicle:2020 STI CWP |
just got the same code today P0300/PFFFE
I was on the way to work and at the stop light, the CEL, Crusie, and Traction Control lights all go up at the same time. The car drove fine to work, no misfire, no sluggish acceleration, nothing. I've had the car since 2013 and i am the first and only owner of this car. I guess I'll pull the wiring harness this weekend and check out the soldering. Car is at 75k now and have done every service except the 75k service because it just turn 75k this past weekend. I was planning to take it in this labor day weekend for the 75k service but i guess now its going to end up being more than the 75k service |
10-02-2018, 02:31 PM | #53 |
Scooby Guru
Member#: 59993
Join Date: Apr 2004
Chapter/Region:
International
Location: WWAAYY west of the Mississippi
Vehicle:Ass, grass or cash no one rides for free!! |
Any more updated fixes to this guys? Got a buddy who's going through this exact problem.
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10-06-2018, 01:45 PM | #54 |
Scooby Newbie
Member#: 388567
Join Date: Apr 2014
Chapter/Region:
Tri-State
Location: Brick, NJ
Vehicle:2014 WRX Hatch ISM |
I still cant figure it out. I found 2 bad grounds I replaced. New wire harness from dealer, 4 sets of spark plugs. i guess maybe coil packs or the pins. gas and a match.
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10-18-2018, 07:08 PM | #55 |
Scooby Newbie
Member#: 228349
Join Date: Oct 2009
Chapter/Region:
Tri-State
Location: Long Island, New York
Vehicle:03 Impreza Wagon White |
2013 WRX 53k P0300
2013 WRX 53k I ran into P0300 CEL along with cruise light. I purchased revised harness and installed. Code came back within 100 miles. Car is running perfectly fine. Subaru of America will not give me any resources on this issue. Not sure what to do. Intake appears happy and tight (Cobb short)
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12-11-2018, 03:48 PM | #56 |
Scooby Newbie
Member#: 388567
Join Date: Apr 2014
Chapter/Region:
Tri-State
Location: Brick, NJ
Vehicle:2014 WRX Hatch ISM |
So like I said, I had found 2 bad ground wires. Both corroded and frayed. I replaced them, Cleared codes and its been a long time since the cell has been on for random misfires. So check all your ground wires.
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12-11-2018, 09:32 PM | #57 | |
Scooby Guru
Member#: 36838
Join Date: May 2003
Chapter/Region:
MAIC
Location: Reston VA
Vehicle:2001 B50 RSTi Sedan 2011 DGM WRX hatch |
Quote:
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02-20-2019, 05:28 PM | #58 |
Scooby Newbie
Member#: 497697
Join Date: Feb 2019
Vehicle:2013 WRX Hatch White |
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02-20-2019, 05:30 PM | #59 | |
Scooby Newbie
Member#: 497697
Join Date: Feb 2019
Vehicle:2013 WRX Hatch White |
Quote:
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04-13-2019, 12:26 PM | #60 |
Scooby Newbie
Member#: 344231
Join Date: Jan 2013
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13 Wrx Cel
This car has been nothing but nightmares! My car has 77k miles and about 70K+ of them are highway miles commuting for work. I’ve babied this car and I’m the original owner. About a year ago I got the random misfire cel, I tried the harness trick plus a full tune up and it worked for about 4 months and then the cel kept on coming back every other trip to work (80 miles round trip) or so. I finally got around to doing a compression test and cylinder 4 was very low. Long story short- I pulled the motor and also did a leak down test and every cylinder was below the safe range. All the valves were covered in carbon buildup and I sprayed some soapy water in the head and the valves weren’t sealing.. I found a few valve guides that were slightly dropped, but the heads it self wasn’t damaged.. I got both heads done and did a leak down test when it was all back together, I also changed every gasket and it was good to go! Motors back in the car, and boom! CEL! Same ones as before plus an oxygen sensor cel(maybe it was sitting out to long).. I did all new coils, up graded all the grounds(battery, trans, under the motor, driver side fuel bracket ground is new with the new harness) oxygen sensor, injectors,and just installed the upgraded harness. I went back and did the compression test and it came out good.. idle is a little rough, the car sometimes wants to shut off when I come to a stop(after a while it fixes it self) maybe this is the Ecu relearning after I keep removing the battery. I removed the TGVs while the motor was out of the car not sure if the butterfly plate needs to be clocked in a certain position before installing the TGV solenoids(can’t find an answer besides deleting them)
CELs that keep popping up P0300- random misfire P0304 cly 4 misfire P0031 bank 1 sensor 1 oxygen- this was just changed. I opened the ECU to make sure it’s not damaged. Any ideas or help will be greatly appreciate! Thanks! |
04-13-2019, 04:00 PM | #61 | |
Scooby Newbie
Member#: 344231
Join Date: Jan 2013
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Quote:
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04-13-2019, 04:44 PM | #62 |
Scooby Guru
Member#: 36838
Join Date: May 2003
Chapter/Region:
MAIC
Location: Reston VA
Vehicle:2001 B50 RSTi Sedan 2011 DGM WRX hatch |
You do need to clock the TVG motors 90deg before installing them, but you'll throw a TGV CEL if you do that incorrectly.
There's a spring in there that needs to be preloaded via the clocking procedure. |
04-13-2019, 06:21 PM | #63 |
Scooby Newbie
Member#: 344231
Join Date: Jan 2013
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I don’t have any cels for that.. but could that cause any of the issues I currently have?
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04-13-2019, 07:21 PM | #64 |
Scooby Guru
Member#: 36838
Join Date: May 2003
Chapter/Region:
MAIC
Location: Reston VA
Vehicle:2001 B50 RSTi Sedan 2011 DGM WRX hatch |
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04-29-2019, 01:25 PM | #65 |
Scooby Newbie
Member#: 454822
Join Date: Sep 2016
Chapter/Region:
NESIC
Location: Rhode Island
Vehicle:2013 WRX Hatch White |
As an update from my reply from soldering all those ground wires, I still have this CEL come up every 200-1000 miles or so. I've been passing inspection by unplugging the battery (resetting the ECU) and driving it about 200 miles before I go get it inspected. Seems to pass that.
I'm going to be bringing my car to Bren Tuning soon(going from stock to Stage 3), will have them check it out too. Leaving it to the pros. I'll reply back once I hear from them what's up with that. |
04-29-2019, 01:43 PM | #66 |
Scooby Newbie
Member#: 388567
Join Date: Apr 2014
Chapter/Region:
Tri-State
Location: Brick, NJ
Vehicle:2014 WRX Hatch ISM |
How are all of your ground wires? I had to change all mine and it solved the issue. They were rusted and corroded
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05-08-2019, 06:21 PM | #67 |
Scooby Newbie
Member#: 501337
Join Date: May 2019
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Cylinder roughness 0-100
I’ve had a major cylinder roughness problem. (NO CEL). My car cycles through cylinder roughness in cylinder one 0-100 constantly. Once I let off throttle it stays at whatever number I was at and once I’m back on throttle it starts cycling again. Swapped injectors around, swapped coilpacks and spark plugs, compression test came back solid. I have no Feedback Knock or Fine Knock. Thought maybe it was the immobilizer in the ignition bc the car will start and die as soon as the SECURITY LIGHT TURNS ON. Subaru dealership replaced ignition and got me a new key but they’re saying it’s still dying when the light comes on. I’m stumped. I can’t find anything on any forum anywhere. Again, I haven’t thrown a single Check engine light but the car is VERY choppy at idle and feels scary rough when being driven. The whole car shakes so I know it’s not firing on cylinder 1. Any help or any way someone could point me in the right direction, I’d appreciate it very much.
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05-11-2019, 06:48 PM | #68 |
Scooby Newbie
Member#: 392955
Join Date: Jun 2014
Location: Pleasanton, Ca
Vehicle:2013 WRX Tangerine Orange |
Looks like another fun thing to keep an eye out for. Never heard of this issue before, so thanks for the info!
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02-26-2020, 09:55 AM | #69 |
Scooby Specialist
Member#: 122519
Join Date: Aug 2006
Chapter/Region:
NESIC
Location: MA
Vehicle:2005 LGT, 2018 BRZ |
Has anyone found a solution to this? I have a 2013 wrx with the P0300 code. I have replaced the following:
wiring harness 4 coil packs 3 new grounding straps spark plugs 3 times crankshaft position sensor passenger side camshaft position sensor coolant temp sensor Brought it to a shop and they tested the fuel pressure and checked the intake for leaks. I performed a compression test which checked out fine. If anyone has resolved their issues beyond what I have replaced please let us all know. Thanks. |
09-28-2020, 06:18 PM | #70 |
Scooby Newbie
Member#: 518966
Join Date: Sep 2020
Vehicle:2013 WRX Dark Grey Metallic |
Hi everyone, I have been dealing with this issue for a few months now but haven't made much head way. It's a 2013 WRX Sedan.
symptoms: P0300, P0304, rough idle, hard starts, stalls at stops What I've done so far: Replaced plugs and one bad coil pack soldered the 1>4 connection in the wiring harness which fixed it for a few weeks. Brought it to my family mechanic- they checked the plugs, coils, compression, leak down, turbo and everything was okay. They didn't think there's actually a misfire as it also drives fine. Re soldered and drove great for 35 miles, no issues but they came back the next morning. Replaced two grounds that had corroded off. -- I noticed that bank 1 O2 sensor is reading 0V so I am going to see if replacing that helps, but I am stumped that there is no code for a non op O2 sensor. Any way, I was wondering if there is anything else that could be causing this issue? My car is at 135K and my mechanic told me the valves may need to be adjusted, would that cause these problems though? Should I bring it to the dealership? I called a subaru shop and they wanted to do all the same diagnostic work my mechanic already did and weren't very confident about getting it fixed in a timely manner. |
06-14-2021, 09:16 AM | #71 |
Scooby Newbie
Member#: 524908
Join Date: Jun 2021
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I know it may not apply to me but, I have a 2008 legacy GT that is having can buss issues with code P0600. I think its a ground issue but not 100% sure. do you think this might cause an issue outside of misfire? When my issue happens I have rough start up idle for a few seconds then its smooth but as I'm driving my temp gauge pegs out, check engine light starts flashing as well as cruise light and car goes into reduced power.
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12-10-2021, 09:53 PM | #72 |
Scooby Newbie
Member#: 362218
Join Date: Jul 2013
Location: New Hampshire
Vehicle:2013 WRX PBP |
I am trying to get this fixed at the dealer now. I have already replaced coil and spark plugs at another mechanic. $1,200 for diagnosis. ??? I'm not paying that. Then $2,850 to adjust valves. 4 grand?? Called corporate, that price is insane
. After 10 days still waiting for my car. |
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