Member Since: 15 May 2013
Location: Chester
Posts: 7633
Re-occurring fault code p0101-00
Engine TDV6
P0101-00 (6C) Mass or volume air flow - circuit range/performanc
I noticed this fault has been re-occurring since my intercooler hose split. I replaced the hose with a silicon one and everything seems fine although the car does seem to be lacking a little power. Every time I read my fault codes this pops up and clears successfully .. Until I next read the codes a couple of days later. Can anybody shed a little light,? maf sensor replacement ?
30th Jan 2015 5:41 pm
tayaste
Member Since: 15 May 2013
Location: Chester
Posts: 7633
Maybe should have mentioned . Egr emulators fitted last year. I'm not sure if this helps
30th Jan 2015 6:13 pm
robbo770
Member Since: 29 Jan 2013
Location: Aberdeenshire
Posts: 2294
Member Since: 15 May 2013
Location: Chester
Posts: 7633
Ok. Will give it a go in the morning. is the maf a nogo for cleaning ?
30th Jan 2015 6:34 pm
Barn1e D3 Decade
Member Since: 28 Aug 2006
Location: Mid-sussex
Posts: 2021
If it really is the MAF sensor, I would checkt:
- did you disturb the connector above the big silicon intercooler hose?
- check that fuse 17 in the box beside the battery is in place and not fused
I know the last point seems odd, but I drove mine for years without that fuse!2005, TDV6 S, Auto, 190k miles, owned from new, V8 Brake Upgrade, Nancom Evo, RLD protector, BAS EGR blanking & Remap, separate ATF cooler, changing all the fluids ahead of time.
30th Jan 2015 7:14 pm
tayaste
Member Since: 15 May 2013
Location: Chester
Posts: 7633
Thanks barn1e . plenty for me to be checking tomorrow. I did struggle getting the hose to seat on, so I'm not ruling out disturbing the sensor.
30th Jan 2015 7:22 pm
tayaste
Member Since: 15 May 2013
Location: Chester
Posts: 7633
Ok, I'm carrying on in this thread so iguana can sort his battery issues. Without me getting in the way.
Looking into the readings for maf but I'm not sure what usual standard should be. Can anybody help / or maybe check what reading they are getting from there's ?
Looking through the forum it seems 21g/s is far too high, but no definite answer, can anybody confirm
Last edited by tayaste on 17th Apr 2016 12:42 pm. Edited 1 time in total
Yes, that's high, but not what I would call far too high. About 16g/s is normal.
Edit: Having said that, I think 834rpm would be towards the upper end for a normal idle speed (which, obviously, does vary).Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
Actually, that 16 might need revising down a little to 14 or 15 - I can never quite remember. Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
18th Feb 2015 6:42 pm
tayaste
Member Since: 15 May 2013
Location: Chester
Posts: 7633
thanks,
Hopefully somebody can confirm this, then I can try to understand why it's high.
18th Feb 2015 6:48 pm
Allan_T
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
The MSV2 help section for module SM129 has the following values -
Mass Air Flow : The mass air flow sensor measures the mass of air being drawn into the engine. The air flow rate will alter with the engine load and engine speed. Expected values are between 2g/s and 10g/s, normal 6.35g/s
I've checked mine and it's reading 21g/s at idle; however, I don't have a P0101 fault code.GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
18th Feb 2015 6:50 pm
tayaste
Member Since: 15 May 2013
Location: Chester
Posts: 7633
Allan, thank you for checking
Back to the drawing board
18th Feb 2015 7:16 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20740
The MAF generally sees 15-16 g/s
Same for EU3/4, but when the EGR's open, the expected airflow drops to 9-10 g/s
As you have the emulators fitted, this should not drop. But it may be worth comparing to other members who have the emulators fitted
Does the fault return immediately, or after driving?
It may be an intermittent issue with the MAF, or associated wiring. Try plugging it in, and having someone monitor the MAF readings, to see if they drop to 0 g/s at any point. Graphing it here helps massively, as you can see any spikes/troughs that normally would be seen with a digital output
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oops
Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
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