After the warning light first appeared, I followed the forum members’ advice and cleaned both MAF sensors, then replaced all four O2 sensors, but the issue still hasn’t gone away. I also bought one brand-new DENSO MAF sensor and replaced it test, but the warning light is still there. Now it seems like only very expensive work is left, so I’d appreciate some advice. The workshop is suggesting replacing the injectors, but I don’t think that’s the real cause.

 

Vacuum leaks can cause these too, you might want to review this post in the LR3 section https://landroverforums.com/forum/lr...-p0175-114974/

 

Thank you I will do

 

Had same 2 codes on my 2015 LR4 HSE SCV6 engine. Took the dealer a month (long story) to figure out it was the 2 High Pressure fuel pumps. Replaced those and seems to have fixed the issue.

 

Wow that can be expensive business !!

 

I did the exact same thing. I also have a 2015 LR4 HSE.

 

Yes it was!

 

BTW - dont know how long mine had been bad as it started thtowing the CEL/codes within a couple weeks after purchase. And once the LR dealer did the HP fuel pumps, it didn't take too long before I started getting a code that the right bank CAT was bad. Reset the code & it came back within a few more weeks. Took it to an LR shop and they verified that O2 sensors were OK, and that if it had been running too rich for too long a time the CATs will get clogged and go bad! So best to get it figured out & fixed sooner than later.