P1300, P0308, P0303, P0305 AND P0300 - Need Help
#1
02-16-2013 | 01:35 PM
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P1300, P0308, P0303, P0305 AND P0300 - Need Help
I am new to this forum and have spent over an hour scouring Google to try and find out what might be wrong.
About 1 month ago, while driving, check engine light started blinking and car running really rough. This happened out of nowhere, almost as if someone flicked a light switch. There was no warning signs at all.
Anyhow, after searching various Range Rover websites, I was pretty sure that it was either bad coil/plug wires or spark plugs.
The codes at the time were: P0174, P0171, P0300, P0305, P1300, P1319, P0308, P0301, P0306, P0734, P0733.
I have a 2002 Range Rover 4.6 HSE with 115k on it.
As recommended on various RR websites, I replaced:
Spark Plugs with Bosch Platinums
Plug Wires - 8MM Kingsborne
Both Coil Packs
While I was at it, I also replaced the upper and lower plenum and intake manifold gaskets, injector "O" rings and valve cover gaskets as well as changed the oil.
Car ran fine for about 1+ month. I checked the codes and I was still getting PO174 AND P0171 as well as P0733. Doing some further research, I found out that this may be the codes for a bad MAF sensor.
Since I had already spent a nice chunk of change on the repairs mentioned above, I figured that since the car was still running good (except for the CEL being on) I would wait until the MAF failed before I replaced it as this is a rather expensive part.
I forgot to mention that I had also replaced the 2 O2 sensors that are located closest to the front of the car (I think they are called "pre" catalytic converter) back in November 2010.
Ok, car was running good for 30+ days, then out of nowhere, just like the first time, car started idling really rough and check engine light starts blinking when car picks up speed. Only drove car a few blocks before calling the tow truck to have it towed home.
So, at this point I am thinking I have to replace the MAF sensor (I had codes P0174, P0171 and P0733 after I changed coil pack, plugs, wires, etc.). However, when I ran the codes the following codes came up:
P1300, P0308, P0303, P0305, P0300
Mind you that I was fully expecting codes related to the MAF. Now I am really confused?
Not sure if these are coming from the MAF or perhaps I need to change the 2 "post" catalytic conveter O2 Sensors? Not sure what else it could be at this point.
Any help would be GREATLY appreciated.
About 1 month ago, while driving, check engine light started blinking and car running really rough. This happened out of nowhere, almost as if someone flicked a light switch. There was no warning signs at all.
Anyhow, after searching various Range Rover websites, I was pretty sure that it was either bad coil/plug wires or spark plugs.
The codes at the time were: P0174, P0171, P0300, P0305, P1300, P1319, P0308, P0301, P0306, P0734, P0733.
I have a 2002 Range Rover 4.6 HSE with 115k on it.
As recommended on various RR websites, I replaced:
Spark Plugs with Bosch Platinums
Plug Wires - 8MM Kingsborne
Both Coil Packs
While I was at it, I also replaced the upper and lower plenum and intake manifold gaskets, injector "O" rings and valve cover gaskets as well as changed the oil.
Car ran fine for about 1+ month. I checked the codes and I was still getting PO174 AND P0171 as well as P0733. Doing some further research, I found out that this may be the codes for a bad MAF sensor.
Since I had already spent a nice chunk of change on the repairs mentioned above, I figured that since the car was still running good (except for the CEL being on) I would wait until the MAF failed before I replaced it as this is a rather expensive part.
I forgot to mention that I had also replaced the 2 O2 sensors that are located closest to the front of the car (I think they are called "pre" catalytic converter) back in November 2010.
Ok, car was running good for 30+ days, then out of nowhere, just like the first time, car started idling really rough and check engine light starts blinking when car picks up speed. Only drove car a few blocks before calling the tow truck to have it towed home.
So, at this point I am thinking I have to replace the MAF sensor (I had codes P0174, P0171 and P0733 after I changed coil pack, plugs, wires, etc.). However, when I ran the codes the following codes came up:
P1300, P0308, P0303, P0305, P0300
Mind you that I was fully expecting codes related to the MAF. Now I am really confused?
Not sure if these are coming from the MAF or perhaps I need to change the 2 "post" catalytic conveter O2 Sensors? Not sure what else it could be at this point.
Any help would be GREATLY appreciated.
#2
02-16-2013 | 02:22 PM
Super Moderator
Joined: Jan 2011
Posts: 16,322
Likes: 84
From: Savannah Georgia
P1300 Random/multiple cylinder misfire detected Catalyst damaging level of misfire on more than one cylinder
That is what the code translates in the RAVE shop manual. A misfire above a certain percent is deemed Cat damage capable.
Normal first thing with misfires is replace plugs and old plug wires. You can also look under hood at idle in total darkeness for any arcing or light show.
That is what the code translates in the RAVE shop manual. A misfire above a certain percent is deemed Cat damage capable.
Normal first thing with misfires is replace plugs and old plug wires. You can also look under hood at idle in total darkeness for any arcing or light show.
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