P0204 issue

Evening all.
I have a 2003 1.4 petrol c3.
It appears to have an issue with P0204 keep appearing as a warning.
I can get this cleared once ive taken the fuel cap off and then restart the car.
It'll then disappear but reappear a few days later.
So without spending a fortune, does anyone have any ideas what to do first?
There doesn't appear to be leaking coming from the windscreen wiper jets so i feel i can count that problem out.
It has over half a tank of fuel and chucked some STP fuel stuff in as well, which doesn't seem to have done the trick.

Cheers in advance.

Browning_47 wrote: ↑Sun Dec 22, 2019 11:05 pm Evening all.
I have a 2003 1.4 petrol c3.
It appears to have an issue with P0204 keep appearing as a warning.
I can get this cleared once ive taken the fuel cap off and then restart the car.
It'll then disappear but reappear a few days later.
So without spending a fortune, does anyone have any ideas what to do first?
There doesn't appear to be leaking coming from the windscreen wiper jets so i feel i can count that problem out.
It has over half a tank of fuel and chucked some STP fuel stuff in as well, which doesn't seem to have done the trick.

Cheers in advance.

Hi

P0204 is Injector Circuit Malfunction - Cylinder 4

You have either a faulty injector, faulty wiring/connector to injector 4 or an ECU fault.

You can try swapping injectors around to see if the code moves to a different injector, this will prove/disprove a faulty injector.

Browning_47 wrote: ↑Sun Dec 22, 2019 11:05 pm Evening all.
I have a 2003 1.4 petrol c3.
It appears to have an issue with P0204 keep appearing as a warning.
I can get this cleared once ive taken the fuel cap off and then restart the car.
It'll then disappear but reappear a few days later.
So without spending a fortune, does anyone have any ideas what to do first?
There doesn't appear to be leaking coming from the windscreen wiper jets so i feel i can count that problem out.
It has over half a tank of fuel and chucked some STP fuel stuff in as well, which doesn't seem to have done the trick.

Cheers in advance.

You didn't say if there were any actual symptoms. Is the engine rough at idle? Or is just the light coming on?
Its possible the injectors coil is beginning to break down intermittently and not show as a physical fault? But I don't see how removing the fuel cap remedies that. Co-incidence?
The injectors on the TU3 are not that hard to change so I would suggest C3car's course of action and see what happens.
Tip: If the injectors are stuck take your time, they will (eventually) come out but don't be brutal. Get some red rubber grease or silicone dielectric grease (don't use ordinary grease) to lubricate the injector orings when you re insert them otherwise the oring could come off the injector during insertion and you will get an air leak.

After investigating the problem and swapping over the injectors. The problem moved from 4 to 1.
So assuming that the injector was at fault, I purchased a brand new injector today and installed.
Unfortunately the problem is still there and now claims that the fault lies somewhere with the new injector.
Im guessing that unless there is actually a fault with the brand new one which I doubt.
Does anyone have any other possible solutions to solve this issue?
The engine sounds rough when idling and shuts down unless you can give it some revs.

Did you change the correct injector?

Just put the new injector in the opposite end to where it is now and the one you previously removed and put to one side, in the empty space.

You should then have one faulty injector left over that is not fitted.

C3CAR wrote: ↑Fri Dec 27, 2019 5:03 pm Did you change the correct injector?

Just put the new injector in the opposite end to where it is now and the one you previously removed and put to one side, in the empty space.

You should then have one faulty injector left over that is not fitted.

Yes. So to start I had number 4 as the problem. To confirm if this was the case I swapped 1 and 4 over. This showed the fault had moved with the injector to number 1.

So i purchased a new injector and took the old (faulty) out.
But the fault now shows at the new injector.

Should I do something once all is put back together other than resetting the code? As the car is still had the issue.

Browning_47 wrote: ↑Fri Dec 27, 2019 5:20 pm

C3CAR wrote: ↑Fri Dec 27, 2019 5:03 pm Did you change the correct injector?

Just put the new injector in the opposite end to where it is now and the one you previously removed and put to one side, in the empty space.

You should then have one faulty injector left over that is not fitted.

Yes. So to start I had number 4 as the problem. To confirm if this was the case I swapped 1 and 4 over. This showed the fault had moved with the injector to number 1.

So i purchased a new injector and took the old (faulty) out.
But the fault now shows at the new injector.

Should I do something once all is put back together other than resetting the code? As the car is still had the issue.

Did you get the numbers right. Which end did you count as no 1. If you started from the wrong end and swapped, the fault would move. If you then changed the injector based on the incorrect numbering, you may have removed the working injector and replaced it with a working injector. Can I suggest you remove the other injector and replace it with the one you have removed, (Don't think I expressed that very well, but I hope you can figure it.)

routemaster1 wrote: ↑Fri Dec 27, 2019 6:26 pm

Browning_47 wrote: ↑Fri Dec 27, 2019 5:20 pm

C3CAR wrote: ↑Fri Dec 27, 2019 5:03 pm Did you change the correct injector?

Just put the new injector in the opposite end to where it is now and the one you previously removed and put to one side, in the empty space.

You should then have one faulty injector left over that is not fitted.

Yes. So to start I had number 4 as the problem. To confirm if this was the case I swapped 1 and 4 over. This showed the fault had moved with the injector to number 1.

So i purchased a new injector and took the old (faulty) out.
But the fault now shows at the new injector.

Should I do something once all is put back together other than resetting the code? As the car is still had the issue.

Did you get the numbers right. Which end did you count as no 1. If you started from the wrong end and swapped, the fault would move. If you then changed the injector based on the incorrect numbering, you may have removed the working injector and replaced it with a working injector. Can I suggest you remove the other injector and replace it with the one you have removed, (Don't think I expressed that very well, but I hope you can figure it.)

Yeah i had just been pondering this since i wrote my last comment.
A google search from a few other searches appears the show I have taken the wrong one on.
Hopefully I'll swap them over in the morning and it'll be alright.

After replacing would you just start the car normally or would you recommend a process to follow?

For you folks playing along at home and aren't sure what's going on, "normal" engine manufacturers number the cylinders from the accessory drive belt end but PSA number them from the flywheel end!