Engine management light is on

[Welly]

Mt 110 HDi used to throw up the engine light now and again, there were two main reasons:

1) The throttle position sensor (TPS) giving duff values
2) The radiator fan pulling too much current (worn fan)

They were always kinda 'soft' faults and would not affect the car's running. The Code Read in the ECU was another can of worms as it wasn't exactly forthcoming about the problem the radiator fan problem flagged a 'Pre Heater' fault or something, had us all scratching our heads anyway.

[crackpotterpig]

the eml is def not part of the changes to the class 4 test from 20 th march see below:
Directive 2010/48/EU Testable Components
For Class 4, 5 & 7 vehicles

Headlamp levelling and cleaning devices when fitted for HID or LED headlamps

Main beam ‘tell-tale’

Battery (including batteries for electric or hybrid vehicles)

Electrical wiring and connectors

Trailer electrical socket security and damage

Operation of 13-pin trailer electrical sockets using an approved trailer socket tester

Operation of the steering lock (where fitted) including a malfunction

warning in respect of an electronic steering lock

Electronic power steering malfunction indicator lamp

Electronic parking brake control and malfunction indicator lamp

Electronic Stability Control (ESC) components, including the switch (if fitted) and malfunction indicator lamp

Brake fluid warning lamp illuminated or inoperative

Tyre Pressure Monitoring Systems (TPMS)

SRS components including airbags, seat belt pre-tensioners, seat belt load limiters and SRS malfunction indicator lamp

Engine mountings

Speedometer

Indirect vision devices (where they replace obligatory mirrors)

if you are a tester and your failing vehicles for management light on its a incorrect failure

[EdN]

Well, The AAman has just been. Unfortunately his diagnostic kit would not read any faults!
But his techie guys have diagnosed a faulty throtle potentiometer. He has left the Maf unplugged also and the car seems to run ok.
So we are going to chance the 500mile drive home on tuesday and hope for the best.

[EdN]

Where do I start.
Had to put the car in for MOT last week. It failed on various things, ball joints, seat belt light on, eml on etc.
There was no power supply to fault reader socket as well.
Estimate to investigate and cure electrical problems £350 ish + vat.
Estimate for mot repairs £150 ish +vat.
So £500 +ish +ish +vat meant repairs would cost more than what the car was worth.
Result sold for £200 as it stood.
Goodbye 406HDI, Hello Jaguar X type estate 2.2d.
Thanks to all you guys for help along the way, as now signing off from 406 oc and joining X Type forum.

So long all,

Ed

[Menophanes]

the eml is def not part of the changes to the class 4 test from 20th March . . .
if you are a tester and you're failing vehicles for management light on it's an incorrect failure

My experience with my 2001 2.0HDi (bought yesterday!) seems to confirm this. The light is permanently on, with a notation 'Antipollution fault', but the last test (done on 25th April, more than six weeks after the latest change to the regulations) does not mention this even as an advisory.

Moreover, the papers supplied with the car show that this has been happening (though perhaps not uninterruptedly) since at least 2007! In that year the engine-management system was checked (at a cost of £259) by Messrs Hawkins, major Peugeot dealers in Cornwall, for the very same problem; they could not find any actual fault but suggested replacing the high-pressure pump because of possible metal contamination in the fuel (the then owner duly had this done), along with a cautious note that there might be similar contamination elsewhere in the fuel system – which suggests to me that they had not succeeded in actually getting the warning light to go out, and were therefore covering themselves against any accusation of negligence.

Meanwhile, the car runs beautifully.

I do not know what 'MAF' actually means (can anyone explain?), but my private interpretation is 'Meddlesome Alarmist Fusspot'.

Oliver Mundy.

[jallan]

Mine passed MOT in March 2013 with the Engine Management Light on.
Technician said they had dropped all those proposals and that it was only ABS light that was now a fail.
-also displayed "antipollution Fault."

Diagnostics said Mass Air Flow fault but later also Low Turbo Pressure.
Advised to get Turbo Pipes checked for leaks.
Cost £150 for Check and replace pipe.
No faults since.
Got 61.4 MPG reading after 450 mls round trip Today. Half motorway. 25/05/13 (Calipers freed a few weeks ago)

2001 2.0 HDI Est. About 170K mls. (ODometer Bolloxed)