2001 discovery 2, got around 150,600 miles with little to no maintenance. Just got new y pipe exhaust put on that's one thing fixed. Driving home the other day check engine light flashed multiple times. UG says p0134 p0135 p1300 p0300 p0303 p0305 and the codes on the B2s1 o2 codes I think it was p0150 or p0155. I tried to find the p1300 code but no definite answer. I have some new magnecor wires and Bosch +4 plugs. More than likely I will order the 2 new o2 sensors as well. My question is what is the p1300 code and what causes a misfire. I read that a bad o2 sensor can cause the miss, any help is appreciated.

 

P1300 is a multiple cylinder misfire i believe.

 

cause can be injectors, coil, wires, spark plug. In no particular order. I would check and make sure you got your plug wires seated in the coil all the way.

 

Ok when I get off today I'll remove all the plugs and see what they look like and double check that I have all my plug wires seated properly on both ends. Will also take a look at both pre cat o2 sensors and see if it's a good connection. Anything else I need to check while I'm under the truck?

 

1300 is random misfire, see if your crank position sensor nuts are loose. Take the cover off and snug the nuts, if they're loose it gives that erratic code.

 

2002 discovery 2 , 70 k , unable to get o2 sensors on both banks to read, replaced both sensors and I still get codes, and sometimes it says o2 sensor no activity. So I thought it has to be the wiring which there is no way to trace it. Fuse 2 is good. Anyone has suggestions pls let me know I really appreciate it. 72 old master mechanic on heavy duty trucks, it is so aggravating to work on these land rovers