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hoover



Member Since: 18 Jun 2021
Location: North Wales
Posts: 18

United Kingdom 
P0100 error wiring tracing
Hi I have the MAF error modulation error, I have swapped for a new maf, no change eml still on, reset, drive, back on. It drives fine.
Have stripped the loom back to the large plug by the air cleaner and found no issues.

Any help appreciated. Wires look ok.
I have another error that is in not tested, suggesting issue with ecu, but other posts on here suggest that is to do with it having a remap.

Do I keep going with the loom back to ecu, or any other suggestions.

Thank you Freelander 2 Flora
200tdi 90 (Not Defender) Rhubarb
Puma 110 5 door Twinkle
Post #947974 4th Apr 2022 11:33am
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X4SKP



Member Since: 29 Nov 2013
Location: Berkshire
Posts: 2284

United Kingdom 2010 Defender 90 Puma 2.4 SW Stornoway Grey
Hello hoover

Can't add much...
P0100 is indeed the MAF... and will (should) reset itself after around 6 engine cycles (or a forced reset).


Click image to enlarge


MAF Sensor
Cleaned or Swapped for New and NO further P0100 Fault Codes would indicate a fix but are you getting
a repeated P0100 Fault Code... Question

What's the other Fault Code... Question SKIP
https://www.defender2.net/forum/topic83242.html
Post #947983 4th Apr 2022 12:54pm
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hoover



Member Since: 18 Jun 2021
Location: North Wales
Posts: 18

United Kingdom 
Hi so the error started after long drive.

The error is now P0100 MAF Permanent Modulation/pulse width signal frequency is too low.

The other error that Im pretty sure has always been there is ECU Instrament pack Code U3000 System internal failure Calibration/parameter memory failure.

The car has a stage one remap and does the chugga chugga when its switched off.

No performance issues, but the EML keeps coming back on after reset, starting run for a bit, switched off, then when I start it again the MIL light comes back on. Freelander 2 Flora
200tdi 90 (Not Defender) Rhubarb
Puma 110 5 door Twinkle
Post #948012 4th Apr 2022 3:24pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
Take note of the codes, then clear them.

Do they both come back at once or just one?

Is the MAF a Genuine / OEM correct part and relatively new and clean?

The ECU data sounds like specifications set in the tune is outside of allowable parameters so something isn’t right there.

Did it start relatively soon after the time or have you had it a while?

Regards the MAF some people have had nuisance codes caused simply by having a RAI or Snorkel.
I haven’t had this with mine but some have.

Can you put it back to factory tune? If so, go with that and then you maybe able to tell if it’s a software map issue or hardware issue.

If you need help I’d contact the top two tuners that are most used BAS or Alive and ask advice.

If the MAF is new then it should be fine, but if isn’t I’d try a new one.

Also though repeating myself all the time on here, check battery terminals are tightand main grounding points are clean, and secure.
The grounding points, if they are bad can cause a plethora of bizarre issues with the electrics.

Hope some of the suggestions help. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #948036 4th Apr 2022 6:03pm
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hoover



Member Since: 18 Jun 2021
Location: North Wales
Posts: 18

United Kingdom 
Hi gents thank you for your assistance.

The vehicle has an Alive remap, I changed the MAF for a genuine one.

However as part of that they fit an oil soaked pipercross filter and the MAF in it was absolutely caked in oil and filth, replaced that for a paper unit while I was at it and cleaned all the oil from the pipes, also cleaned the MAP sensor.

Turns out the problem was a blown fuse!

One of the engine management fuses ,had blown, the moment I replaced it and reset the error and restarted it, I could see in live data there was no error, also it brought up a load of old errors that were not showing before.

Took it for a drive, switched it on an off a few times, checked DTC's nothing logged, hopefully thats it!

Good news is at least I took the harness apart, checked it and reassembled it, with no kinks, tight spots and all the factory rubbing chafing points, removed. Freelander 2 Flora
200tdi 90 (Not Defender) Rhubarb
Puma 110 5 door Twinkle
Post #948046 4th Apr 2022 7:46pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
Good news, mine is Alives too. I’ve never had a problem at all.

I agree, I’m no fan of oiled filters due to the filter oil migration and contamination from it down the line such as the MAF.

I’ve always used Genuine LR standard air filters. Thumbs Up Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #948060 4th Apr 2022 8:14pm
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