Range Rover Sport 2.7 TDV6 - P0046-00 Error after changing MAF

dannyb13 · Sep 15, 2023

Hi All, new to the forum.

Any help appreciated. - just change the MAF due to a fault code showing the MAF had died, replaced with a cheap - very cheap ebay item (£30 new)

now I'm getting a P0046-00 - Turbo/supercharger boost control solenoid - circuit range/
performance

the car run okay with the bad maf, a bit of black smoke on hard acceleration, but otherwise was good.
after replacing the MAF I'm getting the above code, and car is in limp mode.

Any ideas, obviously the new maf is effecting something, i don't think its a bad solenoid as it boosts fine with the bad maf.
could it be a split pipe?

thanks in advance.

lynall · Sep 15, 2023

Refit old maf and try

dannyb13 · Sep 15, 2023

lynall said:
Refit old maf and try

yeah done that its back to "normal" as in i get the maf error back, but runs fine

Datatek · Sep 15, 2023

dannyb13 said:
yeah done that its back to "normal" as in i get the maf error back, but runs fine

So look for air leaks in the pipe work after the MAF. Not sure if this is the engine that suffers splits in the plastic inlet manifolds, worth a look.

Toyota Twonk · Sep 15, 2023

Tell it you fitted a new sensor with some harsh words
Or remove the sensor and bypass it through the plug with a paperclip ( metal type required)

Datatek · Sep 15, 2023

Toyota Twonk said:
Tell it you fitted a new sensor with some harsh words
Or remove the sensor and bypass it through the plug with a paperclip ( metal type required)

What a useful comment :gunner:

Toyota Twonk · Sep 15, 2023

Datatek said:
What a useful comment

You do most likely have to inform the ECU of the new part that has been fitted...
Or bypass it....so yep helpful

kermit_rr · Sep 15, 2023

if the error goes away with the old maf, then the new 'cheap' maf is junk?

1988smithy · Sep 15, 2023

Put a genuine or at least OEM MAF on it

kds · Sep 15, 2023

Know of someone that changed MAF on td6 for a cheap eBay one and had same sort of thing load of faults so old one back on fault's gone.

dannyb13 · Sep 15, 2023

thank guys,

as far as I can tell, there are no major leaks in the inlet system (i can put the intake hose over my mouth and "blow"

and it holds pressure to some degree, been reading on another forum, that a MAF can cause this error code.

I cleared all the error code via JLR SDD

DISCO3.CO.UK - View topic - Fault Code P0046?

Community site dedicated to Discovery 3, 4 LR3 and LR4 Owners and Enthusiasts. Totally free to join - message boards, galleries, wiki, off road events, social meetings.

www.disco3.co.uk

so my guess is being a "cheap" MAF.

Rubberknees · Sep 15, 2023

kermit_rr said:
if the error goes away with the old maf, then the new 'cheap' maf is junk?

Once bought a cheap china copy MAF for P38. Twas useless. Picked up 2nd hand original and voila

lynall · Sep 15, 2023

On the 2.7 d3 and I assume the rr 2.7 is the same set up? the pipe from maf runs behind top of rad then drops downwards, 8 inches form the top there is a rubber seal, top pipe is only held on with two screws and jub clip maf end, then it lifts off so you can check said seal.

Range Rover Sport 2.7 TDV6 - P0046-00 Error after changing MAF

dannyb13

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DISCO3.CO.UK - View topic - Fault Code P0046?

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