I need some help with a Citroen Xantia 2.0 93-4. CO at idle is .9% rising to 12%+ at MOT fast idle. I haven't checked anything yet except slow fault codes and this only indicates that the Lambda sensor has gone over range trying to correct the fault. Any ideas?
Ithankyow.
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Andrew,
I nervously opened this thread hoping the query wasn't going to find me lacking in my chosen vehicle.
Well it does but I have a good excuse. From my point of view Xantia = Diesel. Every Citroen I look after apart from a 1.4 ZX and 1.9 carb BX are diesels.
Bet the boys on the Tech' Forum will know in a flash.
David
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Andrew,
Are you looking at a Mag Marelli 8P management system?
A little bit of research shows these are prone to.....
1. Faults needing upgraded ECU software from Citroen/ATP or similar. Gather there were about 8 updates and you need a version 124 or higher.
2. Mixture problems due to a fault with the fuel tank fume charcoal cannister system, test by removing/clamping hose from this to inlet manifold.
3. Failure of individual injector o-rings allowing fuel to leak into manifold. Also a fault with cracked manifolds in this area allowing mixture related faults.
All this advice is from other Citroen related sources but seems plausible.
David
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