Hi all, new to the forum.

I have a 2017 RRS Autobiography and ive got this code -

P049B-00 Exhaust gas recirculation - B - Insufficient flow detected

Anyone share any diagnostics i can do to narrow it down to exact fault please?

Seized flap in the exhaust system, or cracked DPF/blocked LP EGR filter

Canny diagnostics advice that like 👎🏻

Can someone translate?

I want to know how to understand exactly what is causing the issue not just taking guesses at 3 possible failures 🤦🏻‍♂️

What diagnostics (read sensors etc) i can do to verify which of the 3 it actually is

Those are the possible causes of P049B fault being logged. There's only so much a person can do at the end of a keyboard. A fault code is only there to point you in the right direction (mostly) No diagnostic computer or sensors will tell you whats wrong 99% of the time

If you want to find out EXACTLY what's causing the issue, your going to have to get your hands dirty and check a few things, as have been suggested

But surely there are differential sensors that can tell me whats blocked??

Last edited by Maca83 on Mon May 19 2025 8:44am. Edited 1 time in total

I think Disco_Mikey has explained it very well, and you may not know that he is a very experienced Land Rover repairer. 2026 P460e Autobiography on order

2022 HSE Dynamic P400e

2017 Discovery 3.0 HSE Silicon Silver Nimbus interior and a few extra toys SOLD

2013 HSE Black, Orkney Grey, Ebony Seats and Ivory Interior SOLD

2006 HSE

Plus a few other cars inbetween!

Last edited by jimbg on Sun May 18 2025 8:56pm. Edited 1 time in total

No, there isn't. I've told you what you need to check. I'm out now

No problem, appreciate the advice 👍🏻