IPD sale XeMODeX - Experts in Volvo Electronics Free shipping all USA - Experts in Brakes
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

P0300 Code "Cylinder misfire"

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

Mr. Detail
Posts: 351
Joined: Wed May 03, 2006 11:21 am
Year and Model: 2002 V70 N/A
Location: Newtown Square, Pennsylvania
Has thanked: 13 times
Been thanked: 2 times
United States of America
Mr. Detail

P0300 Code "Cylinder misfire"

Post by Mr. Detail » Thu Dec 19, 2019 11:05 am

Any opinions as to why I am getting this check engine light code especially after I have already changed out my spark plugs this past summer?
The plugs have only 2k miles on them and I bought the OE Volvo ones with the funky 3 pronged electrodes.

User avatar
vtl
Posts: 1717
Joined: Thu Aug 16, 2012 1:35 pm
Year and Model: 2005 XC70
Location: Boston
Has thanked: 3 times
Been thanked: 49 times
United States of America
vtl

Re: P0300 Code "Cylinder misfire"

Post by vtl » Thu Dec 19, 2019 11:18 am

Ignition coils.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

ignatz
Posts: 87
Joined: Mon May 07, 2007 6:23 pm
Year and Model: 2002 V70t
Location: Birdsboro Pa.
Has thanked: 0
Been thanked: 2 times
United States of America
ignatz

Re: P0300 Code "Cylinder misfire"

Post by ignatz » Thu Dec 19, 2019 12:56 pm

I had a broken wire.
98 S70 T-5

User avatar
vtl
Posts: 1717
Joined: Thu Aug 16, 2012 1:35 pm
Year and Model: 2005 XC70
Location: Boston
Has thanked: 3 times
Been thanked: 49 times
United States of America
vtl

Re: P0300 Code "Cylinder misfire"

Post by vtl » Thu Dec 19, 2019 1:51 pm

Yeah, check wire loom too. If you see anything disintegrated - replace it with a fresh loom right on spot. If any wire touches the metal - it may cause a misfire.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

Mr. Detail
Posts: 351
Joined: Wed May 03, 2006 11:21 am
Year and Model: 2002 V70 N/A
Location: Newtown Square, Pennsylvania
Has thanked: 13 times
Been thanked: 2 times
United States of America
Mr. Detail

Re: P0300 Code "Cylinder misfire"

Post by Mr. Detail » Thu Dec 19, 2019 1:55 pm

vtl, what does the "wire loom" look like? Is that the main cable bunch?
Also can I cheap this out by not having to buy Bosch coils at $40 a piece?

User avatar
vtl
Posts: 1717
Joined: Thu Aug 16, 2012 1:35 pm
Year and Model: 2005 XC70
Location: Boston
Has thanked: 3 times
Been thanked: 49 times
United States of America
vtl

Re: P0300 Code "Cylinder misfire"

Post by vtl » Thu Dec 19, 2019 2:02 pm

This: https://www.amazon.com/gp/product/B00KW9RHYG

Buy one coil, swap it with every coil one by one until a bad coil found. You can probably judge which cylinder is bad by looking at spark plugs.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

User avatar
volvolugnut
Posts: 247
Joined: Sun Jan 19, 2014 9:51 am
Year and Model: 2001 V70
Location: Midsouth USA
Has thanked: 2 times
Been thanked: 28 times
United States of America
volvolugnut

Re: P0300 Code "Cylinder misfire"

Post by volvolugnut » Thu Dec 19, 2019 6:17 pm

Try to get the high temperature wire loom. IPD has it is some sizes. Try to get at least 300F rating. The cheap, general duty stuff degrades under the hood and especially on top of the head.
volvolugnut
2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple parts cars.

User avatar
vtl
Posts: 1717
Joined: Thu Aug 16, 2012 1:35 pm
Year and Model: 2005 XC70
Location: Boston
Has thanked: 3 times
Been thanked: 49 times
United States of America
vtl

Re: P0300 Code "Cylinder misfire"

Post by vtl » Thu Dec 19, 2019 6:42 pm

I bought a replacement wire harness for the ignition coils and VVT solenoids. Just need to splice some wires...
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

chrism
Posts: 984
Joined: Wed Jan 28, 2009 9:38 am
Year and Model: S80 / 2005
Location: Atlanta, GA
Has thanked: 0
Been thanked: 22 times
chrism

Re: P0300 Code "Cylinder misfire"

Post by chrism » Thu Dec 19, 2019 8:44 pm

Mr. Detail wrote:
Thu Dec 19, 2019 11:05 am
The plugs have only 2k miles on them and I bought the OE Volvo ones with the funky 3 pronged electrodes.
Personally I'm not a big fan of those sort of plugs. If swapping coil(s) out doesn't fix it then you might consider a set of plain old copper core single electrodes like NGK BKR6ES. I've had great service from those and the price is right.

https://www.ngk.com/product.aspx?zpid=9345

User avatar
vtl
Posts: 1717
Joined: Thu Aug 16, 2012 1:35 pm
Year and Model: 2005 XC70
Location: Boston
Has thanked: 3 times
Been thanked: 49 times
United States of America
vtl

Re: P0300 Code "Cylinder misfire"

Post by vtl » Thu Dec 19, 2019 9:10 pm

chrism wrote:
Thu Dec 19, 2019 8:44 pm
Personally I'm not a big fan of those sort of plugs.
His plug are stock for B5244S. Made by Denso.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

Post Reply
  • Similar Topics
    Replies
    Views
    Last post