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Fault code - P0301

Posted: Wed Oct 14, 2020 12:34 pm
by CDAW
Has anyone had experience with this fault code.

The car is idling rough (the rev counter is stable), pull off is rough and lack of power.

I have seen something about spark plugs and ignition coil - both are on order (due tomorrow).

Is there anything else that could be an issue?

Re: Fault code - P0301

Posted: Wed Oct 14, 2020 2:05 pm
by chemistman
Most likely coil pack / plugs. Whats the age/mileage of your car? Please come back to the forum if a new coil pack and plugs don't cure the problem.

Re: Fault code - P0301

Posted: Wed Oct 14, 2020 3:24 pm
by CDAW
Mileage is around 29200 - most of it has been motorway driving

Re: Fault code - P0301

Posted: Thu Oct 15, 2020 12:46 pm
by Rickardo
P0301 is Engine Misfire Cylinder 1

It will be the spark plug probably corrosion

I had similar on mine with Cylinder 4 and when i took the spark plug out there was surface rust on it

As advised would put a new coil pack on as well

The issue is VX recommend changing spark plugs every 4 years which is too long in my book

Re: Fault code - P0301

Posted: Thu Oct 15, 2020 3:56 pm
by CDAW
Plug 1 has better days. Replaced all 4 and ignition coil. All seems ok. Will see how the 56 mile journey to work goes tomorrow.

Re: Fault code - P0301

Posted: Thu Oct 15, 2020 7:43 pm
by CDAW
Here's some pics

Re: Fault code - P0301

Posted: Thu Oct 15, 2020 7:49 pm
by CDAW
Based on the rust showing on the spark plug, someone suggested I get a compression test done of the cylinder as there may be water getting in.

Any thoughts?

Re: Fault code - P0301

Posted: Fri Oct 16, 2020 12:32 pm
by Rickardo
tell tales signs are

Coolant level dropping
Continuious white smoke coming from Exhaust
White substance on underneath of oil cap

You should only do a compression test if engine is still running rough or is lacking power

If everything is fine then I would not worry

Re: Fault code - P0301

Posted: Sun Oct 18, 2020 12:35 pm
by CDAW
No smoke, oil cap is fine and coolant levels are good.
The car seems to be running smotothly now - will see how my trip to work goes tomorrow.

Re: Fault code - P0301

Posted: Mon Oct 19, 2020 6:25 am
by john002
CDAW wrote:
Thu Oct 15, 2020 7:49 pm
Based on the rust showing on the spark plug, someone suggested I get a compression test done of the cylinder as there may be water getting in.

Any thoughts?
If the car is pressured washed is there a chance water has overflowed from top of bonnet/windscreen onto coil pack, just a thought.