KV6 Cylinder 6 misfire

brds · 26th February 2023, 09:58

Tickover is a bit rough so I checked with TOAF and getting P0306 - Cylinder 6 misfire detected - signal out of range.
At this stage I'm thinking it could be due to the plug, coil, ECU or a faulty valve.
Cylinder 6 is a bit awkward to get at so before I start, does anybody have prior experience of this?
Also, what do the diagnostics actually check to determine this code?
Thanks, Bob

SD1too · 26th February 2023, 12:02

Quote:

Originally Posted by brds

... does anybody have prior experience of this?

Yes I do Bob. I've had a misfire on two separate occasions and in both cases it was the ignition coil breaking down.

I don't know with certainty but I suspect that the diagnostics uses the signal from the knock sensors to detect a misfire.

It would be a rare occurrence and you'd be very unlucky to have a problem with a sparking plug, a valve or the ECM.

Simon

brds · 26th February 2023, 13:24

You were spot-on Simon. Coil changed and now all OK.
Many thanks,
Bob

26th February 2023, 09:58	#1
brds Regular poster Rover 75 Tourer Join Date: Jun 2010 Location: Haverhill Posts: 36 Thanks: 4 Thanked 6 Times in 4 Posts	KV6 Cylinder 6 misfire Tickover is a bit rough so I checked with TOAF and getting P0306 - Cylinder 6 misfire detected - signal out of range. At this stage I'm thinking it could be due to the plug, coil, ECU or a faulty valve. Cylinder 6 is a bit awkward to get at so before I start, does anybody have prior experience of this? Also, what do the diagnostics actually check to determine this code? Thanks, Bob

26th February 2023, 13:24	#3
brds Regular poster Rover 75 Tourer Join Date: Jun 2010 Location: Haverhill Posts: 36 Thanks: 4 Thanked 6 Times in 4 Posts	You were spot-on Simon. Coil changed and now all OK. Many thanks, Bob Last edited by brds; 28th February 2023 at 15:39..