Cold Misfire Codes P0300 + P0303
Username
Do you already have an account?
Forgot your password?
  • Log in or Sign up

    Welcome to SwedeSpeed
    You're currently browsing Swedespeed as a guest. Please sign up or sign in and take part in the conversation with other Volvo owners and enthusiasts. With more 2 million posts our community is one of the most active groups of Volvo owners in the world. Take a moment to sign up and enjoy all of the features our forums have to offer.
    Page 1 of 2 12 LastLast
    Results 1 to 35 of 43
    1. #1

      Question Cold Misfire Codes P0300 + P0303

      For the last 3 Months. Every third cold startup or so, I get a misfire code on Cylinder #3 (P0303), and twice or three times gotten a "Multiple Cyl Misfire" (P0300).


      Some history:
      Car has 144K
      Always gentle warmups, waiting 20 seconds for idle to slow from 1500 before moving.
      Stock Tune, Filters, FMIC, the whole deal.
      Replaced spark plugs when Misfire codes started (Volvo OEM)
      Traded Coilpack #3 and #1 to see if problem "moves" with part, to no avail.

      Car doesn't buck for seem like it's misfiring at all, MIL usually comes up at 15 MPH.

      Could this be a bad knock sensor? Your input is appreciated.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    2. #2
      A misfire is determined by the crank sensor realizing that there has been no crank acceleration for a particular power stroke event. Since you have already ruled out the coil and plug its time to move onto other causes.

      It could also be a sticky fuel injector. To rule that out swap the 1 and 3 fuel injectors as well.

      If the problem stays on 3 then its time to start looking at the electrical connectors, wiring and the coil driver assuming the R has one.

    3. #3
      Thanks for the input, Tony. I was going to look there next.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    4. #4
      Ended up being a soiled air filter. Yeah, flippin' random. Hope everyone's problems are so easily fixed!
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    5. #5
      Senior Member 850arrrsaylikepirate's Avatar
      Join Date
      Oct 2007
      Location
      Bay Area, CA
      Posts
      11,636
      Quote Originally Posted by Skot53 View Post
      Ended up being a soiled air filter. Yeah, flippin' random. Hope everyone's problems are so easily fixed!
      So was the MAF dirty too??
      2006 S60R - Black Sapphire~Nordkap~GT~iPd Track Spec Sways~TME Springs~TME DP-Exhaust~Bell FMIC~iMIV~E-Codes
      2009 XC90 3.2 AWD - aka the kiddo hauler
      1997 4x4 Nissan - Fook mi this thing is slow

    6. #6
      Nope. I think it was just non-laminar airflow across the MAF causing misfires during start up. Problem is gone. (OEM filter)
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    7. #7
      Senior Member 850arrrsaylikepirate's Avatar
      Join Date
      Oct 2007
      Location
      Bay Area, CA
      Posts
      11,636
      Cool and good to know.
      2006 S60R - Black Sapphire~Nordkap~GT~iPd Track Spec Sways~TME Springs~TME DP-Exhaust~Bell FMIC~iMIV~E-Codes
      2009 XC90 3.2 AWD - aka the kiddo hauler
      1997 4x4 Nissan - Fook mi this thing is slow

    8. #8
      Member VolvokidS60R's Avatar
      Join Date
      Dec 2007
      Location
      G-Burg MD
      Posts
      4,248
      Quote Originally Posted by Skot53 View Post
      Ended up being a soiled air filter. Yeah, flippin' random. Hope everyone's problems are so easily fixed!
      ok so...... Yea thats FLIPPING WEIRD!!!!!!!
      In all my years at volvo iv never herd of this, but hay there is a 1st for ever thing right..?
      No more R got a 1995 240sx converted to a Silvia in replacement... Can't say I miss the Volvo
      P.s no more am i Volvo tech... I now am a shop Forman at a high performance shop.
      Quote Originally Posted by Fitzy View Post
      Yeah right, he's all happy you called...then a yellow birdie flys by and oh here's a cupcake, btw what were we talking about...

    9. #9
      Could have been involved with the change of the seasons too. Weird electrical and building fitment issues come and go with the heat and freeze of the seasons at my work, too. I'll let you guys know if it comes back.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    10. #10
      Yep. Came back. Thinking it may be a fuel issue. Dunno when the last time the fuel filter was changed, so I'll start there, and work my way to injectors. Changed the spark plugs recently when this stuff first started, so that's not it.

      Also, going to check the MAF again to make sure it's clean.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    11. #11
      Make sure you do a leakdown test stone COLD!
      it may be time for valves? 04's were bad for those

    12. #12
      Thanks for the suggestion, but I think that's pretty far down the list. The car doesn't smoke or do anything else screwy (like a car with bad valves does). I'll start with sensors first.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    13. #13
      How many 04's with bad intake valves have you worked on? I have had quite a bit and never have seen one smoke or anything.

      Just a suggestion though...

    14. #14
      Again, thanks for the suggestion. I've only has experience with VWs and their valve stem seals that wear out, causing smoke. This is my first Volvo. I'll take it into a shop if I can't get to the root of the trouble. Thanks!

      Bought some LubroMoly fuel system cleaner and MAF cleaner... we'll see how it goes.
      Last edited by Skot53; 09-03-2010 at 08:59 PM.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    15. #15

      Cool

      After I cleaned the MAF, the car runs much smoother at idle now. I think that may have been the issue. (No CEL yet, either) When I replaced the air filter, I should have cleaned the MAF, I think hat would have taken care of the problem. It was a bit dusty in there (nothing too big, though). I guess there's a good reason to keep the foam sock on the stock air filter.

      Thanks for you help everyone! I'll keep you guys posted if it comes back.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    16. #16
      Member
      Join Date
      Sep 2009
      Location
      Camas WA
      Posts
      1,171
      Scott, What are you using to read your codes? My cheapy from Harbor Freight wont list them.... PIA!
      12 Dodge Challenger R/T (midlife crisis)
      11 Rav4 Limited V6
      05 SR GT Black Saphire - Gobi and proud of it. Also very proud of my Anthracite 18" Pegs, Blacked out grille, IPD upper mount, JRL mod. TRADED IN 1/21/12
      58 Ford F100 302 C4 9"

    17. #17
      Member inteller's Avatar
      Join Date
      Aug 2009
      Location
      Tulsa, OK
      Posts
      5,105
      because to get good codes you need DICE. Those are just generic mandatory codes.
      2008 Titanium Grey Metallic C30 R-Design
      2006 Passion Red S60R
      Packages: Premium, Climate Options: Sport Appearance Package, 18" Pegs, 6Spd Geartronic, Navigation
      Accessories: Sunglasses holder, Sirius Radio, Volvo Digital Jukebox Mods:SS DEM Mod

    18. #18
      Member VolvokidS60R's Avatar
      Join Date
      Dec 2007
      Location
      G-Burg MD
      Posts
      4,248
      Check all 5 coil packs for cracks. if find any crack of any kind replace. also you should be your head tested. i had a cust car with cold miss fire and come to find out it had a slow cooland leak into cy3.
      No more R got a 1995 240sx converted to a Silvia in replacement... Can't say I miss the Volvo
      P.s no more am i Volvo tech... I now am a shop Forman at a high performance shop.
      Quote Originally Posted by Fitzy View Post
      Yeah right, he's all happy you called...then a yellow birdie flys by and oh here's a cupcake, btw what were we talking about...

    19. #19

      Wink

      Quote Originally Posted by 58Ford2 View Post
      Scott, What are you using to read your codes? My cheapy from Harbor Freight wont list them.... PIA!
      Scangauge II. It was $170 from iPd, but it helped me find an evap fault (bad gas cap :rolleyes) within the first week of ownership. If you want me to scan some codes for you, I'm totally willing to pop over after work.

      Quote Originally Posted by VolvokidS60R View Post
      Check all 5 coil packs for cracks. if find any crack of any kind replace. also you should be your head tested. i had a cust car with cold miss fire and come to find out it had a slow cooland leak into cy3.
      Already checked the coils, they look fine. When the problems started, I swapped #1 for #3 to no avail, and inspected all of the coils closely (funny because I just posted about some cracked coils on VW and Audis). I'll keep an eye on things. Thanks again for the help guys!
      Last edited by Skot53; 09-07-2010 at 08:22 AM.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    20. #20
      Member VolvokidS60R's Avatar
      Join Date
      Dec 2007
      Location
      G-Burg MD
      Posts
      4,248
      well youy know any bernt spots fail coiles also.
      but if no fix id start lookin into a head gasket test like this
      http://www.matcotools.com/ProductImages/AC560000.jpg
      http://www.matcotools.com/Catalog/to...ype=T&cat=2477
      i bet if all else fails check head gasket
      No more R got a 1995 240sx converted to a Silvia in replacement... Can't say I miss the Volvo
      P.s no more am i Volvo tech... I now am a shop Forman at a high performance shop.
      Quote Originally Posted by Fitzy View Post
      Yeah right, he's all happy you called...then a yellow birdie flys by and oh here's a cupcake, btw what were we talking about...

    21. #21
      Quote Originally Posted by VolvokidS60Redited View Post
      well you know any burned spots indicate failed coils also.
      Yeah, I used to have a VW GTI and and Audi TT, i've heard all of the horror stories about "Coilpacks". Coilpack Failure Log

      Thanks for your help, Nick. I'll keep everyone posted. It's been a long Labor Day weekend with many hours of driving, and may hours of sitting (which tends to trip the code), with NO CODES! So, I think this may be resolved.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    22. #22
      Could just be a sticky fuel injector. Try a can or two of fuel injector cleaner. If that doesn't do anything for you and you feel up for it, pull the fuel rail and swap around the injectors to see if that moves the misfire. If it does then replace the bad injector.

      I don't think it has anything to do with your maf or filter since there is no way those items would cause just one cylinder to fail on a power stroke.

    23. #23
      Quote Originally Posted by StealthyS60R View Post
      Could just be a sticky fuel injector. Try a can or two of fuel injector cleaner.
      I put in a can of LubroMoly Fuel System Cleaner when I cleaned the MAF, then filled up at Chevron.

      Quote Originally Posted by StealthyS60R View Post
      I don't think it has anything to do with your maf or filter since there is no way those items would cause just one cylinder to fail on a power stroke.
      Thanks for the input. I'm getting a variety of codes at the moment, mainly P0303- but also 0300 (multi) and 0301 (#1 misfire) as well.
      Last edited by Skot53; 10-02-2010 at 01:12 PM. Reason: clarity
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    24. #24
      Does it happen at lower fuel levels? If its not purely electronic I wonder if air is being sucked into the fuel pump intake and sending air bubbles down the fuel rail which could also cause a rash of misfires.

    25. #25
      It came back again the other day... Starting to get a bit annoying. It would help if I didn't work so much so I could bring it into a shop.
      Quote Originally Posted by StealthyS60R
      Does it happen at lower fuel levels?
      You know what... maybe it does!!! It does seem to go away for a few days, then come back when I'm at lower fuel level. Has that happened to you before? I did replace my fuel level sender, but I'm pretty sure I put it together correctly.

      edit: it happens at all fuel levels. Empty, full, half tank, doesn't matter.
      Last edited by Skot53; 01-25-2011 at 11:11 AM.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    26. #26
      Well Skot, that hasn't happened to me on my R, but I have ran another fuel injected car low on fuel before and experienced a flurry of misfires that occur when you start sucking air into the fuel pump.

      Just a scientific wild assed guess based on thinking about all the possible causes could be leading to your particular symptoms, lol.

    27. #27
      Drove 80 or so miles this weekend... Still no CEL . Called the local dealership asking about the Fuel Pump Recall. The Service Manager claims that the fuel pump problem will not cause a CEL, and I pretty much agree. All of the internet research that I've seen, it's just the fuel smell. Made an appt for a week from now to check on the fuel pump to make sure it isn't leaking... though I may cancel. I really don't like other people touching my car.


      edit: I did end up canceling. I hate dealerships. At this time, my car is no longer eligible for the recall due to mileage.
      Last edited by Skot53; 01-10-2011 at 06:05 PM.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    28. #28
      It hasn't gotten better or worse, but I figured that I would update.

      I've just been leaving the CEL on, not caring, due to other issues making the CEL come up just about every day. Search my name on these forums for more info.

      I took it into an independent Volvo mechanic to get a software update. I was having troubles with the Fuel Leak Diagnostic Pump, and I figured I'd take it in, since getting to the pump is such a PITA. When they updated the firmware, the service writer informed me that the P0303 code was possibly due to software as well, since I told him that I changed the spark plugs and moved the coil- which didn't help at that time. He did not mention anything about valves, though he WAS just a service writer, the mechanic didn't mention anything either... I'll update this thread in a week or so with a conclusion.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    29. #29
      Member Short Circuit's Avatar
      Join Date
      Mar 2005
      Location
      Baltimore, MD
      Posts
      2,964
      With 144K miles, your coils are toasted 2x over. Jeez man, get 5 new coils from IPD in your own back-yard and solve this problem once and for all!
      SOLD!!! 2005 S60R. Mods: IPD (Stage 2 ECU, Trak Spec F&R sways, 3" DP, HD-TCV, HD-coils, HD-endlinks, SS brake lines), HEICO (CATback, 18" Volution wheels), Phuz PhMIC, JRL resonator delete, RKelly CAI, PLX OLED Boost Gauge, VST roof spoiler, 35% 3M window tint, other littler things.

    30. #30
      Quote Originally Posted by Short Circuit View Post
      With 144K miles, your coils are toasted 2x over. Jeez man, get 5 new coils from IPD in your own back-yard and solve this problem once and for all!
      Would you say, perhaps, that they have a Short Circuit?

      BTW, the car now has 152,500 miles. She likes to be driven! I was waiting for the iPd R coil debacle to be over, and for them to be re-released on their website. The P0303 CEL came back on again this morning, shortly after start-up. Swede One Auto Werks treated me really good yesterday, so I may lean to them for further diagnoses. (cold leak down test, et al)
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    31. #31
      Junior Member ari951's Avatar
      Join Date
      Nov 2010
      Location
      Florence Kentucky
      Posts
      824
      Quote Originally Posted by Short Circuit View Post
      With 144K miles, your coils are toasted 2x over. Jeez man, get 5 new coils from IPD in your own back-yard and solve this problem once and for all!
      +1. Fixed my problem.

      Also, I cannot remember the code (P2303?), IDK, but the recall for replacement of fuel pump fixed this code.
      2004 S60R MT | Black Sapphire/ Gobi | factory aero body kit | painted grill | painted headlight bezels | custom R badge front grill | 18" two tone metallic grey/black pegs | smoked tail light lenses | 20% tint | USA spec ipod interface | integrated subwoofer system | EBD delete | DEM heatsheild |http://picasaweb.google.com/10580646...NevjZSB6N72mgE

    32. #32
      Quote Originally Posted by Skot53 View Post
      Always gentle warmups, waiting 20 seconds for idle to slow from 1500 before moving.
      Waste of fuel. Just drive gently (low boost and low RPM) until things start to warm up.
      The Car Talk guys got this one correct!
      2002 Volvo S60 T5 5M (SOLD) - ECU, intake, exhaust - 2:05 at BIR long course || 2006 Volvo S60R 6M Sonic Blue (RIP - saved my life) - 2:03.5 at BIR long course - 2:00 at BIR short course - Road Trip Pics - My HD Trackday Videos - Loud enough for ya? || 2007 Volvo S80 V8 (his), Barents Blue, 35% tint, Sport Package (4C), Heated and Cooled Seats, IPD Rear Sway Bar || 2011 Volvo XC70 T6 (hers), Oyster Grey, 35% tint, IPD Rear Sway Bar

    33. #33
      20 seconds isn't THAT long... Buckle seat belt, plug in iPod, turn on wipers. it's usually calming down by then. It's not like i let it run outside for half an hour.
      2004 Sapphire/Nordkap S60R traded in for a 2006 British Racing Green - Mini Cooper S - John Cooper Works

    34. #34
      The CEL has turned off as of yesterday after work. I've noticed that the car has a very slight stutter when it is doing the 20 second warmup in the morning and after work, which very well could be causing the code. I am waiting for iPd to reissue their HD R coils (due mid-february), and I will replace them all then, and move injector 3 to position 1, just incase that is the root problem. I am really stating to think that it is the coils and not the injectors. The car starts the same regardless of how long it has been sitting. If it WAS a stuck or leaky injector, it would cause rough, longer cold startups, right?

      BTW, the Volvo code that came up when I had my software update was "ECM-3533 (startup)".

    35. #35
      Quote Originally Posted by Skot53 View Post
      20 seconds isn't THAT long... Buckle seat belt, plug in iPod, turn on wipers. it's usually calming down by then. It's not like i let it run outside for half an hour.
      Still a small waste. I'd rather "waste" my gas enjoying WOT when the light turns green than sitting in my garage. I plug in my phone (Trapster), buckle up, tune the radio, hit the garage door button, then start the car.
      2002 Volvo S60 T5 5M (SOLD) - ECU, intake, exhaust - 2:05 at BIR long course || 2006 Volvo S60R 6M Sonic Blue (RIP - saved my life) - 2:03.5 at BIR long course - 2:00 at BIR short course - Road Trip Pics - My HD Trackday Videos - Loud enough for ya? || 2007 Volvo S80 V8 (his), Barents Blue, 35% tint, Sport Package (4C), Heated and Cooled Seats, IPD Rear Sway Bar || 2011 Volvo XC70 T6 (hers), Oyster Grey, 35% tint, IPD Rear Sway Bar

    Page 1 of 2 12 LastLast