K series misfire diagnosis
Posted: Wed Sep 24, 2025 7:21 pm
Hi All
I've got an 03 TF 1.8 135 as well as my Streetwise and its got a fault and well its a K series so thought i'd ask here.
Just its passed its MOT and drove there ok and passed the emissions test, but on the way home developed an obvious misfire I can feel and the engine light came on.
Got myself an OBD2 code reader and it’s come up with three codes, P0301, that’s a generic misfire code. Then the more important P0313 code which is misfire detected low fuel level, and P0313 with a P after it. The one with the P is not listed as a separate code and I have no idea what the extra P indicates, if anything.
Now I’m aware code P0301 can have multiple fuel related causes but one thing comes to mind. The car has not
been used this year, I taxed it to go for the MOT and to use it a little now so the fuel in the tank has been there for at least 10 months so I’m sure qualifies as old.
So anyone got any experience of old fuel causing misfires and codes and what’s the best way round it?
I assume I could fill the tank with new fuel but with limited use that’s likely to sit there until next spring.
Or are there any other common culprits for a K series and code P0313.
Cheer Bean.
I've got an 03 TF 1.8 135 as well as my Streetwise and its got a fault and well its a K series so thought i'd ask here.
Just its passed its MOT and drove there ok and passed the emissions test, but on the way home developed an obvious misfire I can feel and the engine light came on.
Got myself an OBD2 code reader and it’s come up with three codes, P0301, that’s a generic misfire code. Then the more important P0313 code which is misfire detected low fuel level, and P0313 with a P after it. The one with the P is not listed as a separate code and I have no idea what the extra P indicates, if anything.
Now I’m aware code P0301 can have multiple fuel related causes but one thing comes to mind. The car has not
been used this year, I taxed it to go for the MOT and to use it a little now so the fuel in the tank has been there for at least 10 months so I’m sure qualifies as old.
So anyone got any experience of old fuel causing misfires and codes and what’s the best way round it?
I assume I could fill the tank with new fuel but with limited use that’s likely to sit there until next spring.
Or are there any other common culprits for a K series and code P0313.
Cheer Bean.