I searched and didn't see a thread on this yet so hopefully someone is savvy about the L494 diesel model. I'm receiving the following codes:
P2BAE00 - NOx exceedance
P2BAE02 - NOx exceedance
P2BAF-00 - NOx driver inducement active

So far I've taken these steps:
1. Replaced the DEF injector
2. Physically inspected/cleaned the exhaust port for the injector (no crystal buildup)
3. Checked the DEF tank, within 1.6L of full
4. Ran a dosing test successfully. Spray pattern is correct
5. Forced a DPF regen

Nothing is eliminating the codes and I'm down to 113 miles before no-start. The nearest LR dealer has no openings for a couple weeks and my other ride is a BMW 645 6 speed. With performance tires. In the upper Midwest. You guys can do that math. I'm getting a bit desperate. Mechanically I'm capable of performing whatever repair needs to be done, but I must be missing something. Anyone got tips where to turn next?

TIA

 

Hi
how did you resolve this issue. I am in exactly the same situation at the moment! 66 miles and counting!!
cheers

 

I never solved it completely. It seems I have buildup in my EGR valves that cause soot accumulation and eventually throw those codes. I still get them but have figured out how to work around:
1. You need a scanner tool capable of forcing a DPF regen. I use an Autel 800 series
2. Force a regeneration. It only takes about 15 minutes and a few miles of driving to get under the 6gpm threshold
3. After you’ve dropped the soot level below 6, there’s a function to reset the DEF quality monitor. Reset that and the countdown timer goes away.

I’ve been running this procedure once a month regardless of whether I have a countdown or not. The EGR valves are a pain to reach so I’m going to try a chemical cleaning to see if that helps.

 

It’s quite possible that the root of your problem is a faulty NOx sensor rather than the DEF injector or the DPF. These sensors are responsible for measuring nitrogen oxide levels in the exhaust, and when they start to fail, they often send false readings to the ECU. The ECU then interprets those readings as an emissions exceedance, which explains why you’re getting the “NOx exceedance” and “driver inducement” codes, even though you’ve already addressed the injector and dosing system.

I came across a replacement NOx sensor that’s listed as a direct fit for the L494 Range Rover Sport and other JLR diesels: xenons4u.co.uk/fpla-5j299-bb-nox-sensor.html

Before jumping into replacement, I’d suggest a couple of checks:

• Inspect the wiring harness and connectors – corrosion, bent pins, or heat damage are common and can mimic sensor failure.
  
• Verify part numbers – remove your old NOx sensor and confirm the stamped part number matches the replacement listing.
  
• Check both sensors – there are usually two (upstream and downstream of the SCR). Sometimes only one fails, but the symptoms are very similar.
  

If the numbers line up, fitting a new sensor is generally straightforward and much less costly than chasing an SCR catalyst fault. After installation, you’ll need access to a proper diagnostic tool to clear the stored fault codes and reset the “no-start” countdown; otherwise, the car may still refuse to restart once the miles run out.