Catalytic converter could be disintegrating and blocking the exhaust

'Could be' lots of things!

The Mondeo is renowned for the EGR valve getting gummed up, mine was bad and caused hesitation (but not power loss) and it had only done 60k. Dealer will just replace it, it is an easy but messy job to unbolt it and clean it with clutch cleaner and a toothbrush 🙂

There is probably a CMAX owners forum somewhere, they are usually pretty good. If not, I bet its the same engine in the S-Max/Mondeo etc, I know there is a couple of good Ford Mondeo forums.

We had the same thing with our mondeo, it turned out to be a little sensor of some sort.

Mine did that and it was a cracked intercooler pipe.

Return to Ford dealer for proper fault diagnosis, they can access the fault codes stored in the ECU. Then you'll know exactly what the issue is and can take things from there.

L.

but that costs money

MAF? Can you clean them on the TDCI?

Jump on a Ford forum or post on pistonheads. Could be alittle electrical contact cleaner bought from Halfords could be worth a try.

well just an update..........

light was still on when i went to work this morning.

had a nosey around at lunch to see if i couod se any loose wires but nothing spotted.

i gave the egr valve pipe a good bash though just in case.

the light has gone off on my way home??

This is a WIDE open guess but the ECU might have defaulted to a factory 'safe' programme and your faults been stored in the ECU history.

I'd still get it taken in for diagnostics.

Do you want to be in the middle of a 100mile riding trip upto Scotland and suddenly the light comes on again as your engines been running to lean and fuel has detonated in your Cat etc?

Get it taken in to a Ford specialist!

I've seen an engine light come on 3 times- once on a MX5 due to removing the passenger seat, another for changing the stereo and blowing a fuse and finally for a faulty fuel/air sensor that could have led to the above scenario.

Hora is talking sense

hora although the light was on the car wasnt running any different to normal apart from the one time it lost power and the slight hesitancy??

renton: have you checked my suggestion? I only ask because I'm talking about the same car which I still own which had the same symptoms.

It might not be a dramatic loss or noticeable difference in power to you. It might not be as dramatic as the limp-home settings that some cars have.

Take it in- better safe than sorry.

the car wasnt running any different to normal apart from[b] the one time it lost power and the slight hesitancy?? [/b]

So not normal ! I know you are trying to save money but probably better to spend some money now to get it fixed /checked than carry on and really break it IMHO

ok i will run it to work and back tomorrow and if it happens again i will call the rac as thats who my breakdown is with and they can plug it into their computer , that way i dont have to pay ford!!

Agree with Junkyard- you dont keep running something thinking it might have sorted itself out.

If I even get a whiff its in and sorted. I dont want my missus and hora jnr sat on a hardshoulder waiting for the RAC with a screwed engine!

if its not a company car - you will be the first one crying when you have to buy a new car or spend 5k dropping in a new engine ...

Suspect the ECU detected an error of some sort and it went into spack mode. If it went off after shutting down, it could be intermittant.
You could always disconnect the battery which will clear and reset the ECU to its default settings, but this often wipes any fault codes as well (not to mention restting the stereo settings).
If you dont want to do that, then get thy ass down the ford stealership.

I had a very similar problem with my FOcus TDCi, engine management light coming on, loss of power, car grinding to a halt then starting after being left alone for 30 minutes.

Turned out to be the camshaft sensor, cost £25 to replace and minutes to fit.

This is a common problem.

As mentioned above, it could be any one off a number of problems.

The engine management light on my C-Max TDCI came on, & when diagnosed, it was the DPF (Diesel Particulate Filter) that needed recharging.

Rentons approach to car mechanics 😆
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renton - where are you based? Anywhere near glasgow give me an email and I'll drop my diagnostics kit on it for you.

Without being able to reset the code theres no point waiting to see if it returns, often they're intermittent/wiring/connection related but you need to be able to clear it to be sure of that and you don't awnt to put many miles on it in that condition just in case it's one of the more serious faults and prolonged use may cause further damage.

garylake just out of interest which intercooler pipe cracked??

cheers

steve