Hi. I have a 2002 range rover p38, it has 90400 miles on it.
I started getting check engine light around 89000 miles. It wasnt always on nor was blinking. So I thought it was a reminder for 90000 mile service. So kind of ignored because I didnt have money for service.

Anyhow I just bought a code reader and I am getting
P1300 unkown diagnostic trouble code
P0300 random/multiple cylunder misfire
P0304 cylinder 4 misfire
P0307 cylinder 7 misfire

Also I have the check engine light all the time but when I pass 40-50 mph it starts blinking.

What should I do, and can I do it my self. Can't really afford a technician these days.

Thank you
-Jeff Arkun

 

Time to change your spark plugs and wires.

 

if you change plugs and wires and still misfires put seafoam and good gas so your injectors are cleaned it worked on mine.I had misfires and p1300 code plus other put new o2 sensors in and seafoam now runs great

 

cylinders 4 and 7 spark off the same coil. you need to see if you have spark on both/either of those, and go from there. Could just be plugs and wires, may need a new coil pack.