ENGINE MISFIRE - HAVE ERROR CODES

[stevra]

I need some help please!
I have a 2004 (54 plate) 206cc 2.0 petrol with 55k miles, which had a MIL on and the 'anti-pollution fault' warning displayed. The original symptoms were the engine 'hunting' at idle and a misfire. I borrowed a diagnostics code reader and initially came up with an EGR fault code & P0204 (see below). I've replaced the EGR and although the hunting at idle has been cured, it still sounds like its running on 3 (and a bit) cylinders. It seems to run fine for a few miles,then begins to misfire and although the idle is fine, there is a strong smell of fuel when idling for more than a few minutes.
I've checked the codes again and have now got the following: -
P1340 - Camshaft position sensor B circuit malfunction
P0401 - Exhaust gas recirculation flow insufficient detected
P0204 - Injector circuit open cylinder 4
I've had a chat with a knowledgable guy and he has suggested that although the code reader has not detected an oxygen (lambda) sensor fault, he thinks it could be related to it...possibly a pre-cat sensor fault. Before I start shelling out for new sensors, I'm wondering if anybody has experienced similar issues and could point me in the right direction....This is my 1st visit to the forum, so hi everybody!
Regards, Steve

[Capncol]

Hi Steve. I would start with P1204 as that would give a misfire. Have you got access to a set of "noid lights" or a digital meter?

(ps. Deleted your duplicate post)

[rfman]

I agree with the captain, the injector misfire has to be adressed first.

[stevra]

Thanks for the replies....
I can borrow a set of noid lights from the same guy that I borrowed the fault code reader from, so I'll have a go....I assume I should see the LED flashing as the engine is cranked? I suppose it would be best to compare it with a 'good' injector? Also, if the signal is comparable, how easy is it to change an injector....and, is there anywhere/anybody you would recommend to take the car to in Essex (I live near Chelmsford, in a town called Maldon). I know I should try to 'DIY', but I'm not particulalry good at repairs...always seem to go wrong - and that is not very good for a Environmental Systems Homologation Engineer, who's job involves emissions & fuel economy testing to confess!! Never mind :-(
Regards, Steve

[Capncol]

Thanks for the replies....
I can borrow a set of noid lights from the same guy that I borrowed the fault code reader from, so I'll have a go....I assume I should see the LED flashing as the engine is cranked? Yes. Exactly that. Also check with it running. The noid plugs into the wiring loom instead of, or in series with the injector. If it flashes, you need to check the impedance of the injector with a meter

I suppose it would be best to compare it with a 'good' injector? Also, if the signal is comparable, how easy is it to change an injector Quite easy to change with a reasonable toolkit. I can give you some pointers

....and, is there anywhere/anybody you would recommend to take the car to in Essex (I live near Chelmsford, in a town called Maldon) What about the guy you borrowed the code reader from?

I know I should try to 'DIY', but I'm not particulalry good at repairs...always seem to go wrong - and that is not very good for a Environmental Systems Homologation Engineer, who's job involves emissions & fuel economy testing to confess!! Never mind :-( As said. If you want to have a go, I can guide you, but tell us what you find with the noids and meter first
Regards, Steve

[stevra]

Thanks for all your help & advice Col,
The guy who I've borrowed the reader/noid from is another engineer in my office....I haven't got the cheek to ask him to come and fix the wife's car! I'll have a go myself and will come back to the forum once I've carried out the noid light test.
Once again - thanks for the help,
Regards, Steve

[96morris]

Hi
If I were you I would use the PP2000 Software as it would allow you to reset faults , i beleave software is available but you will need to obtain the leads etc . these can be found on Ebay for less then 100.00pounds very often software is also given. When Working on the front drive of a 206cc I some how put 2 faults on the system. a cheap fault reader would not reset only the correct software. I am aware if I were to leave the battery disconnected for long time it would reset the ecu ,however this is not practical.
I have not had the software that long ,but can tell you that without it you are likely to put more faults on it when looking for the fault . re the Lamda sensor , the dc heater supply is pulsed so you can not read it , however if you put a digital meter cross the signal pair you should be able to read voltage changes as you rev up , you could compare this with upper or lower sensor for comparrison. my money is on the spark ingition module . hope this helps( you may find leaving battery off over night may clear some of the faults codes.

[Capncol]

A good pro scanner will read and clear engine faults just as good as pp2000, and he has already got the codes read