Driving back to work this afternoon I get the Restricted Performance message and amber engine symbol light up, with associated low power levels. Plugging in my IID Tool the engine fault codes are P0033-00(2F), P010B-22(6C) and P010D-00(AF). For some reason I can only see the 1st word of the fault description on the dash (i have the original IID tool), but Googling the codes shows the following:
P0033 - Turbocharger bypass control valve open circuit
P010B - Mass or volume air flow B circuit - range/performance
P010D - Mass or volume air flow B circuit - high
I'm assuming the Turbo Bypass Control Valve is the one just behind the intercooler inside the front right wheel arch, in the pipework between the 2nd turbo and intercooler? This was removed and cleaned a few months ago so i doubt it's sticking.
The P010 codes refer to the secondary Mass Air Flow sensor I think??
What's confusing me is why would all 3 codes come up at the same time (the mileage they were recorded is exactly the same), when they seem to refer to 2 separate components?
Any ideas? Duff MAF sensor, or dodgy connection causing spurious fault codes on both components simultaneously? I'm 100 miles from home so not able to do much by way of crawling underneath wiggling things!
Any advice appreciated Previously:
2005 D3 2.7 TDV6 S
1984 90 2.25 Petrol CSW
1992 90 200TDi Hard Top
1995 Discovery ES 300TDi
2003 90 TD5 Truck Cab
P0033 cured - loose connector on the secondary turbo bypass valve
I purchased a new MAF sensor PHF500090 from Euro Car Parts (made by VDO, exactly same as LR fit) , fitted it as a replacement for the MAF sensor on the secondary turbo air feed (B circuit?) and the fault code P010D remains after clearing with the IID tool. So I swapped the 2 MAF sensors over , fitting the new one to the primary turbo side, and the fault code changes to P0103 which is the same fault as above (P010D), but for the primary air circuit. This would suggest the new MAF sensor has the same problem as the one I replaced, but that sounds like too much of a coincidence to me?
Some forums suggest a problem with the main turbo actuator sticking, but I'm thinking if that was the case the fault code wouldn't move from the main to secondary side as I swap the MAFs over. Also, I'm getting no turbo related fault codes.
Restricted Performance message on dash remains.
What's left of hair well and truly pulled out!Previously:
2005 D3 2.7 TDV6 S
1984 90 2.25 Petrol CSW
1992 90 200TDi Hard Top
1995 Discovery ES 300TDi
2003 90 TD5 Truck Cab
OK, for the benefit of anyone who stumbles across this thread in the future, I've finally been able to solve the MAF Fault code problem. Speaking to a very helpful parts guy and workshop tech at Roger Young Land Rover this morning, apparently the fault code can show up on the wrong MAF sensor (for vehicles with 2 like the 3.0 D4 & RRS). So by refitting the old MAF I removed yesterday, and keeping the new one in place (part number PHF500090) the fault code cleared and after letting the vehicle sleep, the Restricted Performance message also cleared. So with a fault code P010B or P010D referring to a problem on B circuit, this is actually a possible fault with primary turbo air supply MAF. Fault code P0103 refers to a problem on the secondary turbo MAF sensor (the back one on the air filter box).
Time for a pint 8)Previously:
2005 D3 2.7 TDV6 S
1984 90 2.25 Petrol CSW
1992 90 200TDi Hard Top
1995 Discovery ES 300TDi
2003 90 TD5 Truck Cab
23rd Jan 2016 3:10 pm
motolite
Member Since: 18 Mar 2013
Location: Sydney
Posts: 931
Quote:
Time for a pint
A well deserved one too.
24th Jan 2016 2:37 am
Mr Blingy
Member Since: 08 Nov 2013
Location: swindon
Posts: 2
Hi
We had the same problem and made a video of our findings today.
Hope this helps anyone with this problem.
I will try and check the resistance of a known good one and a known bad one.
13th Sep 2017 7:26 pm
dgardel
Member Since: 03 Nov 2009
Location: Greater Venice
Posts: 2025
Member Since: 03 Jun 2016
Location: ceredigion
Posts: 53
Hi just to add to this for future.
We had similar with restricted performance and p010d. I swapped to sensors around to see if fault moved or stayed I ended up with no fault code but still restricted performance. Swapped them back....p010d and restricted performance returned. So I replaced 'B' maf and all was well. So it maybe worthwhile noting that for a faulty maf in A I only got restricted performance, no code !
16th Oct 2017 7:57 am
couplands
Member Since: 26 Oct 2006
Location: Peak District & Cornwall
Posts: 230
Hi,
I'm getting the P010B & P010D codes and the "restricted Performance" error message. (Mine is a D4 SDV6 2011 model).
I get the error even before the engine is run, if I just turn the vehicle on - I've tried clearing the error codes but they return immediately.
I haven't had chance to swap anything over yet, but does the fact the error appears before the engine is running indicate a faulty wire rather than a dirty sensor..?
The fault will show up immediately prior to starting the engine, as this is part of the initial set up procedure for the car. If you swap the maf sensors and read the fault codes again, if you get a different codes then it most likely you B sensor as shown in the YouTube video above. I had the exact same problem last weekend. New maf sensor from landrover sorted it. You only get one lap, make it count !!
12th Apr 2018 9:23 pm
couplands
Member Since: 26 Oct 2006
Location: Peak District & Cornwall
Posts: 230
Thanks, will try swapping the sensors.
Do you actually need to swap the sensor or can you just swap the connectors, as they are identical sensors...?
I swaped my sensors as I tried to clean them to see if that would solve my issue. Plus I am not sure the plugs are long enough to swap over in place I would place my bet on the b sensor being faulty.You only get one lap, make it count !!
13th Apr 2018 7:19 am
tooslow964
Member Since: 03 Jun 2016
Location: ceredigion
Posts: 53
Sure that would work, but think my connector wouldn't easily reach ?
13th Apr 2018 7:45 am
couplands
Member Since: 26 Oct 2006
Location: Peak District & Cornwall
Posts: 230
^^^ You're right, the connectors wont reach.
Anyway, I bought a new sensor (from LRdirect) for £70 delivered - it was a VDO/Siemens version with 2 year warranty.
Take 5 mins to fit. Super pleased it fixed the issue.
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