P00300-P0306 fault codes

[David Shimmel]

2012 LR4 142K miles.
Normal freeway driving when CEL came on. I used my ODB scanner and came up with these 4 faults.
P0300, P0302, P0304, P0306. Engine was running smoothly and I noticed no difference after the CEL came on. I cleared the codes and drove another 100 miles and the CEL did not come on.
Timing chains, guides/tensioners replaced at 67K miles. Oil changed at dealer every 5k.
Thoughts?

Thanks
Dave

 

[jlach993]

i got these misfire codes when driving from NYC to Tampa Florida. I stopped out at a shady gas station somewhere in Georgia off the highway and they only had one grade of gasoline. I was desperate as i only had 8 miles left and had the entire truck filled with luggage and family. I was not going to push my luck any further. Anyways after filling up i got those misfire codes approx 150 miles or so of driving. I blame it on bad quality of gasoline. I ran the fuel down and filled up with shell and threw in a bottle of chevron cleaner. The code went away after i reset the battery. Its been 3 years since that trip and all is fine.

 

[David Shimmel]

Thank you

 

[jlach993]

Thank you

You’re welcome, i hope thats the issue in your case. Where did you fill gas up last?

 

[David Shimmel]

Almost always premium at Costco. I was concerned about 4 faults simultaneously.

 

[jlach993]

So weird costco gas is pretty good. The four faults are all related so it’s not like its different codes. It’s all caused by one issue. If it doesn’t come back then i’d blame it on the gas.

 

[David Shimmel]

Fingers crossed. Thanks for your input.

 

[jpjp]

Timing chains, guides/tensioners replaced at 67K miles.
Thanks
Dave

May I ask why you changed the timing chains, guides/tensioners at such an early milage? Just preventative maintenance?

 

[David Shimmel]

Previous owner did it. It appears to have been a lease vehicle. This information showed up on the carfax. It's one of the reasons I bought it. It is in excellent condition. Obviously well cared for.

 

[fatboyone]

could it be the
Diesel Particulate Filter (dpf)