Car starts 10 seconds anti pollution light appears and then

Hi I have a c3 1.4 desire recently I had the engine management light come on with anti pollution fault appeared and car would cut out I gave the car a good service while waiting for a code reader to be delivered so it's had new spark plugs coil pack it's had a new crank shaft sensor also well the reader came today read the codes which are p0107 and p0106 which I believe was the map sensor so cleared the codes car started and stayed started cut it off went in the house got ready to go get this map sensor fitted car ran like a dream with the old one still fitted and no faults at all on the dash so fitted the new sensor turned car over great all still running left the car for around half an hour went to start it and just would not start at all replaced the old sensor to get it home it was fine for a while then started with the cutting out again any ideas as it is throwing no codes up at all now and spent so much trying to fix the problem

Hi I had a problem with the anti pollution fault the car would start run for about 10 seconds the fault came up and it cut out well while waiting for a reader to come I changed the coil pack spark plugs and a new crank shaft sensor the reader came and showed codes p0106 and p0107 which was the Map sensor I believe so cleared the codes and went to get a sensor it ran perfect got there changed the sensor fired it up started ok turned it off came back around 30 mins later and it just turned over would not start at all put the old sensor back on and it started tried to get it back home with the old sensor only got part of the way then the cutting out came back any ideas as I'm out of them now

Hi Jojo2012

Jojo2012 wrote:the reader came today read the codes which are p0107 and p0106 which I believe was the map sensor

The codes do refer to the readings seen by the ECU that are referenced to the Manifold Air Pressure sensor.

But, the presence of the codes do not necessarily point the finger at the MAP unit.

The errors are 'readings out of range' and this can be cause by a wiring fault to the sensor, a leak or blockage to the air flow that is measured or a problem with the ECU.

The C3 is known for problems with electrical connectors and just removing and refitting the plug/socket can clear faults.

If you want to dig a bit deeper, they way I would go is to look at 'live data' from the sensor (if your OBD reader can do that). You will get an idea of how the sensor is performing.

Jojo2012 wrote:went to start it and just would not start at all replaced the old sensor to get it home it was fine for a while then started with the cutting out again any ideas as it is throwing no codes up at all now

Not start?

Does it turn over?

No codes? Got fuel?

Hi thank for that I appreciate it and with the new sensor it will not start at all but replace it with the old one and it will then start again and do the usual 10 seconds and cuts out it's got half a tank of petrol but a bit in as I put some redex in to clear it all out

Jojo2012 wrote:Hi thank for that I appreciate it and with the new sensor it will not start at all

If you want to diagnose this, check you have the right part, check it not damaged and then read the codes with it in.

Jojo2012 wrote: replace it with the old one and it will then start again and do the usual 10 seconds and cuts out

If you want to diagnose this, read the codes that are stored for cutting out.

If your code reader doesn't cut it, try the proper lexia tool on it.

citroen-c3-tips/lexia-and-obd-diagnosti ... -t655.html



You may have introduced an extra fault with

new spark plugs coil pack it's had a new crank shaft sensor

can you put the old ones back in?