Landrover Discovery 4 (LR4) Mass Airflow Sensor Clean

[@valeriolancia]

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.

[@ilanlevin636]

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 .

[@schloemoe21]

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 :)

[@DipstickDave]

The error message never came back, so that must have been the problem. I wonder how much that would have cost at a dealer!

[@karimalameddine5092]

Does it affect fuel economy? Thanks,

[@davefrance3721]

@@DipstickDave 200 UK pounds for the part plus whatever they charge for diagnosing the fault and fitting the part. At jaguar you won't see much change from 500 quid after all that. They wont clean sensors just replace them. My son's jaguar Xf has the same issue but the sensor has failed. I bought an OEM part for 95 UK pounds.

[@darrylfranklin7490]

And what was the outcome

[@marktabaldwin]

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!

[@DipstickDave]

Good luck!

[@marktabaldwin]

@@DipstickDave I got them both off in about 20 mins, the 1st lower nut on the 2nd sensor took a lot of patience to get off, they hid that pretty well! The first sensor was pretty bad I’d say, 2nd spotless. They are now drying before putting them both back (hopefully! Lol).

[@marktabaldwin]

Put everything back together, the lubricant spray was a great tip, took the car for a spin and it’s fixed! THANK YOU! Genuinely made up! I’m following your other vid next about the DIY service!

[@DipstickDave]

@@marktabaldwin Thats brilliant! Time to get a good socket set! Oh and some overalls, the key is to look like you know what you are doing!! :-)

[@marktabaldwin]

@@DipstickDave lol! I received a socket set from my dad about 10 years ago, I remember saying ‘WHAT am I going to use that for?!’ So far this week I’ve fixed the car and a tumble dryer!

[@IanSRutter]

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.

[@johncooper5293]

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.

[@BoooSelecta]

Morning Nikos!

[@blackvulcan100]

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

[@bazzer606]

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.

[@DipstickDave]

Without the code you're shooting in the breeze. If not the mass air sensor, it could be crank position, cat, ox, turbo sensor or just a wiring problem somewhere. If you have AA home start then their reader will find the problem. Or just pop into a local landrover specialist, or good forbid a dealer if your feeling flush. If your on the landrover forums you could see if someone local has a nanocom or foxwell or some other reader proven with Landrover's. Good luck, sorry I couldn't be more help.

[@bazzer606]

Just an update it might be useful to anyone reading, went to an independent approved Landrover garage and there were 2 codes showing , 1 for a broken breather pipe apparently and 1 for water in fuel filter , both items renewed at a cost of £295 ! Car running perfectly again now.

[@ThunderStruck89]

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.

[@veloistist]

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?

[@veloistist]

Not an issue on flat/downhill

[@teranceracker3480]

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

[@DipstickDave]

It did work. And haven’t had the error since.

[@Gazzelle16]

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 ?

[@DipstickDave]

No my problem was in the spring/earlier summer. It was fine on startup and only happened when the wife gunned it out of the driveway and up the hill. I would check you hoses too. Just in case the cold weather is contracting a seal or a split somewhere.

[@Gazzelle16]

Dipstick Dave it’s odd that it’s only on start up, I would have thought the fault would throw whatever time if there was a leak?

[@DipstickDave]

If it’s a seal or even a turbo gasket, it could seal itself went it heats up. Bottom line it’s either a sensor (dirty/faulty) or air getting into the system somehow(split in pipe, seal or gasket). It’s one of things you have to do a bit of investigating, but start with the cheapest first!

[@vicbade9702]

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

[@neilk22]

You might know by now that your crankshaft is probably cracked. It’s a known issue with the lr4/disco4. The design flaw is in the lubricating of the shaft thru the crank bearings and the impeller on your oil pump, way under efficient. You will need to body off, engine rebuild. The labour alone is $$$

[@DipstickDave]

If that is the case, it’s a new second hand engine would be the cheapest/quickest way to sort it. Good luck!

[@bazzer606]

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 ?

[@DipstickDave]

Hi Barry, It's really odd that you're not getting any error codes. What readers are you using? I use the Foxwell NT510 and its very good. Does your code readers have Landrover specific software as basic code readers won't work. As for the error it's self, double check for air leaks on the pipes via cracks or loose connections. It could also be oxygen sensors, but again you should be getting error codes.

[@L3mod]

Which is bank 1 and bank 2?

[@guysion2550]

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

[@DipstickDave]

+Kingnlibger11 King Hi, P006a is the MAF sensor. If cleaning it hasn't solved it, check everywhere for air leaks. Check the clamps are nice and tight, and there are no cracks anywhere on the plastic pipes. They can crack when you force them out. If there is, duck tape them to get home. It's crappy breaking down on holiday it's happened so many time with me. Good luck on getting home. Luckily it's not the worst error to have, but still a pain.

[@lukek3953]

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

[@erf240g]

rubbish its got a turbo boost leak

[@truelyirish100]

You nevvr said if it fixed the problem? was it just the lights on your dash or was it actually power restricted? Its like watching a flm and leaving just b4 you fin out what happened???????// WTF. LOL

[@DipstickDave]

Yup, sorted the problem, reset the code never to be seen again.

[@richardsonbeaucejour4089]

Hablas españon

[@Ermelindofilipe]

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.

[@DipstickDave]

It could be faulty sensors or air might be getting into the pipes somewhere. Cracked plastic or a leak on the turbos.