Landrover Discovery 4 (LR4) Mass Airflow Sensor Clean 

Hey Dave, thanks for the video, very clear and good tip before going to a dealership. I had the same error but only intermittently and I cleaned yesterday both sensors. I hope that it will not appear again.

And what was the outcome

Second sensor is clean because its rarely used. Belongs to the second turbo which only kicks in above 3000 rpm. With so much torque the Disco rarely needs to venture beyond 3000 rpm .

I do this on all my cars with an MAF from time to time. It's amazing how much difference it makes if it's been neglected for awhile :)

Hopefully it worked, so you didn't have to go to the stealership. My brother needed a new battery for his Range Rover. Jag/LR quoted £400 for the battery, and £500 for the job, so I told him to get himself down to Halfords. Their selections are excellent. They made sure he got the right one. £219 for the battery and £27 for the job.

Just tried this on a 2011 RRS but Restricted problem came back at high speed. I also swapped the sensors over so expecting to show MAS 'B' in fault code now. interesting that MAS A is for 2nd turbo and is cleaner as less used. 'A' doesn't use the temp sensor hence only 3 wires in connector, 'B' (nearest from front) has 4 wires. Both sensors are identical so can be swapped over. Ordered a new one. If that doesn't fix it will check for cracks and leaks.

My name is Vic, please I need your help, my LR4 Discovery is not starting. It's been 2 weeks now my mechanic don't have a clue here in Africa. The system is detecting crankshaft sensor error. We tried fix another one but still it refusing to start. I am getting so frustrated with this. I need advice plsease

Hey, I’m actually trying this today! (This morning!) I’ve had the dreaded performance message appearing when I go over 60 - which is pretty annoying! This is my first time doing ANYTHING with mechanics of a car!

Any idea what the bolts are that hold them in place. I managed to drop one when removing them. Searched high and low for the thread type to no avail.

Are the sensors exactly the same ? if so you could swop the dirty one with the cleaner one ?

Thanks for the reply Iv had a good look round the engine at the hoses and all connections and all seem tight and clean , the scanner I have is a Konnwei KW808 OBD11/EOBD which seems to communicate with the car ok and apparently is ok for Landrover, the only clue is that when the car is stone cold in the morning the light is off and will normally come on when the engine has warmed up or bizarrely sometimes when I reverse , I did think was it linked to brake pad wear but I believe that would the red brake light on for that, what I might do is call the AA out sometime when the light is on and see what they make of it.

Hi Dave Iv got the yellow triangle coming up intermittently with Restricted Performance message although there don,t seem to be any lack of performance , Iv removed the MAF,s and cleaned them and hasn,t made any difference and Iv tried 2 handheld diagnostic devices and they say no code stored , Any ideas please Iv a 2010 Discovery 4 ?

I have the restricted performance and think it could be maf related. Out of interest was your problem only when cold enough to activate heated windscreen and did it disappear on restart ?

Dave had an irritating problem with my 2015 LR4. Going up a slope on motorway with just a light pressure on throttle I get Restricted performance. Stop, switch engine off and on again and fault clears. It’s okay uphill under load, and it an issue on flat or downhill. Garage have not been able to fix it although after Cam belt change it was good for about 400 miles despite best effort to replicate fault. Then started again - could it really just be a dirty MAF sensor?

Yes but you dont mention if this worked....

Which is bank 1 and bank 2?

Thanks mate you help me. Am in holiday with my family and I have the same problem but the code come out is P006A so I will try to do this just take 500 Miles to home And a mecanic want to open the engine ... to watch this video help me to do this first I stop him Thank if you can have any idea for this Code P006A

Under the front bumper, near the fog light. This little parking sensor got pushed in. Does anyone know how I can fix that?

Hello... my HSE LR4 2010 is giving Low engine performance. I have clened the both air mass flow, but the error folows!! Is there another thing to do? Nest regards.

Hablas españon

rubbish its got a turbo boost leak