C3 Engine Management Light

[zony]

The engine management light has been annoying my for the last 3 months. I have had it diagnosed as Air Flow meter Low or no output. I don't remember the code.

 

So about 10 weeks ago I changed the air flow meter - no change.

 

I then noticed that the rubber moulded loom for the injectors and air flow meter was cracked where it turns at 90 degrees near injector no 4. If you opened the crack up bare wires were exposed. The rubber moulding prevented me from making a proper repair. Since then I have been looking out for a replacement loom. No joy on ebay, but one turned up on 1st Choice Spares from a scrap car.

 

The car is a 1.4 16v HDi XTR. Citroen wanted close on 400 pound for a new loom without guarantee that would be the cure.

 

I fitted the replacement loom . I must add that I have worked on many cars in my time and fitting this tiny loom almost broke me. So difficult, due to poor design. In the process I snapped a leak back nozzle on one of the injectors. New set ordered.

 

Just letting you know the MIL light has finally gone out. It took about 20 miles over three trips. I have also noticed a small diesel leak above cylinder no 2. I am suspecting the leak back connector as this broke easily. So the moral of the story is don't trust Citroen diagnostics. They couldn't pin point the fault and just wanted to replace parts until it disappeared.

 

Tony

Edited May 17, 2015 by zony

[paul.h]

Thankyou for the post. This highlights that a fault code indicating a sensor fault could be its connector or wiring and these should be checked before the part is replaced. I will add it to the Common Problems topic since most people would just replace the air flow meter and not look any further.

 

What year and mileage is your car ?

[zony]

Thanks Paul. car is an 06 XTR model and has just turned 80k miles. The small 2 wire connector that goes from the round large connector is all but impossible to get to .  You need the fingers of a two year old to get at it. Eventually made a small hook out of a metal coat hanger and fished around till it finally landed on the connector release latch. This was the connector for the electronic EGR valve.