 | Home > Puma (Tdci) > MAF issue with a '09 2.4ltr Defender Puma 110 wgn... |
 
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 43   
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Gents...
I put my Puma in for a checkup/service and prior to going in for the service I had no issues with the Engine Check light coming on, but as we are planning a fairly big remote trip year into central Australian desert area, I wanted to have the cooling system checked out along with having to replace a cracked exhaust manifold. While in the shop I had them check the loudness of the injector rattle & check/clean the MAF sensor as well... They performed an Injector Pilot + Pump relearn but apparently it took a few goes before it seemed to work which according to the mechanic is a possible indication the injectors "may" be coming to their use by date (car has 175,000kms on the clock). I picked up my Defender and it sounded great with the loud injector rattle gone & I drove the 40min drive home w/o any problems and that's where the Defender stayed until I returned from holidays. Upon my return home from holidays, I took the Defender for a drive and this is when the Engine Check light came on. Checked the code via the Scan GaugeII and it came up as P0100 (MAF related). The ScanGauge was unable to reset the code, so it was a trip back down to the workshop where the mechanic checked it out. He had a quick look over the connections, hoses, etc and all looked good. He reset the code and I was off home again. About 6kms from home, the Engine Chk light came on again. Phoned the mechanic and rebooked the car in for a checkup next month. In the meantime, I reset the code via my recently purchased Nanocom and I've been driving it around since for a few hundred kms w/o the engine check light coming up again until today when it popped its head up again - same code P0100. My Question: With regards to replacement of the MAF - what is the better way to go? Genuine LR brand; OEM or aftermarket? I was quoted a BIG price from the LR mechanics and had a look online on LR Direct and the price for a good quality one was about $115AUD (part No: MHK501040A.M8 / Brand: Intermotor / Supplier: Bearmach) vs the LR brand at $290. Is the Intermotor a good reliable brand MAF sensor or should I spend the extra on the LR one? Also, regarding the MAF and MAP sensors... Do these 2 sensors depend on each other? I'm very much still learning about how all this works... I assume the MAF measures the Airflow/volume coming into the Turbo and the MAP should measure the Air Pressure/Volume into the Air Intake Manifold and if these figures don't correlate then a fault code is generated ?? Is this right/wrong? I was told by the mechanic that the code (P0100) will not affect the performance on my engine and to date it hasn't but as we are planning a remote trip into the Simpson Desert along the Madigan Line, I don't really want any electronic issues popping their heads up in the middle of the desert, especially with my family on board.... What are some of the common causes for the P0100 code to come up "other than" the MAF Sensor? Extra info on vehicle: No leaks in the IC Hoses as these are all Silicon hoses. The previous owner had a larger aftermarket Intercooler fitted + an Engine Remap done...Vehcile has about 175,000kms on the clock. Drives and performance is great. thanks in advance.... RobM Cheers..... Rob 1995 Defender Tdi 110Wgn 1996 LR Discovery Tdi300 (A) 2009 Defender PUMA 110Wgn My TRPS: Rob's WikiLoc Trips |
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24th Apr 2019 7:12am |
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| boxoftricks Member Since: 06 Feb 2019 Location: Home Counties Posts: 745  
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I had a similar problem with mine. I swapped the MAF for a new one but problem remained. I reverted back to original one. My warning light comes on when cruising on the motorway and I believe the cause is from the EGR value that recirculates the exhaust gasses. Iām planning on removing mine for a good clean based on other forum users experiences.
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24th Apr 2019 9:51am |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 43
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With the Remap that mine has, I believe the operation of the EGR Valve has been disabled...
I'm surprised that there is no performance issues when this comes up... rob Cheers..... Rob 1995 Defender Tdi 110Wgn 1996 LR Discovery Tdi300 (A) 2009 Defender PUMA 110Wgn My TRPS: Rob's WikiLoc Trips |
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24th Apr 2019 10:14am |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2262  
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Intermotor is ok. Some of the Hella on ebay are crap knockoff Puma 110" SW
............................................................. Earth first. Other planets later |
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24th Apr 2019 1:08pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7687 
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I had that code with sticky turbo vanes. Cheers
James 110 XS Utility 130 Puma Station wagon/camper (in the making) 90 Puma Hardtop |
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24th Apr 2019 10:16pm |
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| Badger110 Member Since: 06 Feb 2018 Location: South hams Posts: 1025 
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A MAF sensor error doesn't mean there is an issue with the sensor, it is more than likely an airflow issue.
Replacing the part that tells you there is an issue is like replacing a smoke alarm because it makes a noise... |
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24th Apr 2019 10:28pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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An EGR can can cause MAF issues, but won't if it's blanked and what sort of state is the filter?
Is there any obstruction in the pipework and has the MAF been changed? Brand wise, if it was me I' only go for either Genuine which is expensive or likely Bosch as the Bosch logo and P/N I see on the actual MAF on mine in the first place. Diesel$ Live$ Matter. ā½ļøš¢ļøšØāš§š§°āļø RED, WHITE & BOOST! š¬š§ Last edited by custom90 on 25th Apr 2019 12:35am. Edited 1 time in total |
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24th Apr 2019 10:33pm |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 43
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Interesting.... but how would this be related? The last 2 times the code came up was at Idle.... Cheers..... Rob 1995 Defender Tdi 110Wgn 1996 LR Discovery Tdi300 (A) 2009 Defender PUMA 110Wgn My TRPS: Rob's WikiLoc Trips |
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25th Apr 2019 12:00am |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 43
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True.... but what makes me think it might be related to the sensor is that when I purchased the car last year, I remember talking to the previous owner about was there any electrical issues and he did mention that he had gone through a couple of MAF sensors over the years that he owned it. When I ask about cost he said about $80 or so. Now knowing what sort of cost the LR ones are I'm wondering if he was putting cheaper ones in and whether over time these tend to fail earlier... Cheers..... Rob 1995 Defender Tdi 110Wgn 1996 LR Discovery Tdi300 (A) 2009 Defender PUMA 110Wgn My TRPS: Rob's WikiLoc Trips |
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25th Apr 2019 12:08am |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2262
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Have you tried at a Ford dealer (in case the maf is stuffed)?
P/N 6C11-12B579-AA Puma 110" SW ............................................................. Earth first. Other planets later |
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25th Apr 2019 12:18am |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 43
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The filter is in a good condition but I'm not sure how this would affect the MAF unless u are referring to letting dust and crap through... This whole MAF related engine check light coming on only started after the mechanic cleaned it. Prior to that - no issues at all. From my very limited knowledge and understanding... the MAF measures the Air Flow (including Air Volume?) between Air Filter and Turbo and the MAP measures the Air Pressure(including Air Volume?) post turbo to Air Intake Manifold. So I assume that these 2 sensors work in conjunction with each other and if there is a difference, then a Fault Code would be generated - Would this be somewhat correct or am I totally off the mark?? The previous owner had changed the MAF a few times over the years that he had owned it and said that the cost of the MAF were only about $80 or so. From that I assume he wasn't putting the factory LR ones in.... Cheers..... Rob 1995 Defender Tdi 110Wgn 1996 LR Discovery Tdi300 (A) 2009 Defender PUMA 110Wgn My TRPS: Rob's WikiLoc Trips |
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25th Apr 2019 12:20am |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2262
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AFAIK maf also measures intake temperature and if the maf is faulty, then the map read some learned numbers......do not know more. Puma 110" SW
............................................................. Earth first. Other planets later |
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25th Apr 2019 12:24am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6482 
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Need the full fault code for more info - P0100 just means it's the MAF, there's a more specific code that will pinpoint things.
 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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25th Apr 2019 12:02pm |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 43
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Guys...
I've recently tried testing out the NEW Nanocom that I recently purchased on my Defender and I have a couple of questions... When scanning for any fault codes, there is 2 options: (1) READ TESTED and (2) READ NOT TESTED. I assume that (1) is when the fault code is there permanently &/or intermittently? I assume that (2) is when the fault code was present but then disappeared/cleared itself and is no longer present/current?? I performed a scan in each section and got the following: I'm currently having the Engine Check light coming up on my Dash and the following code on my ScanGauge (SGII) is only P0100, but the Nanocom also shows an intermittent P0403 (see below): (1)- FAULT 1 OF 2 ECU: Engine Management CODE:P0100 Mass or volume air flow circuit (PERMANENT) FREQUENCY MODULATION/PULSE WIDTH MODULATION FAILURE - SIGNAL FREQUENCY IS TOO LOW. FAULT 2 OF 2 ECU: Engine Management CODE:P0403 Exhaust gas recirculation control circuit (INTERMITTENT) GENERAL ELECTRICAL FAILURE - CIRCUIT RESISTANCE ABOVE THRESHOLD. =========================================== These CODES below only show up on the Nanocom (not on the SGII) and I "believe" that these are "old" codes that are no longer present... Is that correct? (2)- READ ā NOT TESTED FAULT 1 OF 2 ECU: Engine Management CODE:P0606 Engine control module/powertrain control module processor / Control module processor (NOT TESTED DTC, PERMANENT) SYSTEM INTERNAL FAILURE - INTERNAL ELECTRONIC FAILURE. FAULT 2 OF 2 ECU: Engine Management CODE:P0234 Turbo/supercharger overboost condition (NOT TESTED DTC, PERMANENT) GENERAL FAILURE INFORMATION - NO SUBTYPE INFORMATION. Looking for Comments/ideas? I'm assuming that my MAF might be up for replacement as I've had a look at the Silicon Hoses/clamps/ MAF connection and it all "looks" normal... Cheers..... Rob 1995 Defender Tdi 110Wgn 1996 LR Discovery Tdi300 (A) 2009 Defender PUMA 110Wgn My TRPS: Rob's WikiLoc Trips |
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26th Apr 2019 7:10am |
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