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Misfire (P1300, P0304, P0303): be happy it didn't happen again or...?

2003 Range Rover, 100,800miles

Yesterday morning it was 50F, I had been driving the RR for about 3 minutes and the engine temp gauge was at ~1/4. The vehicle was at ~40 mph and 2500rpm and I was accelerating slowly and all of a sudden I felt a hesitation and then noticed the SES (Service Engine Soon) light flashing. I immediately released the gas pedal to pull over and the vehicle began running fine and SES stayed off.

Got to work and checked my codes which were P1300, P0304, P0303. I cleared the codes and the vehicle sat all day.


I have since put another 20-25 miles on the vehicle with no issues whatsoever. I even accelerated aggressively a few times (I normally drive very gingerly) and everything is still fine.

Should I count my lucky stars it went away and forget about it?

Is there something I should investigate ASAP?
 

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2002-2005 Range Rover MkIII / L322
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Re: Misfire (P1300, P0304, P0303): be happy it didn't happen again or...?

remove the center covers on the cam covers and inspect the plug wells for oil if you have oil then you need to swap out the cam cover gaskets.
If no oil then PVC system needs to be checked
 
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