C4 Grand Picasso - P0262 Error - New Injector 1 needed?

[findmak]

Hi guys,

I was driving on the motorway with my 2014 C4 Grand Picasso HDI when all of a sudden the engine management light came on and the ESR lights.
The car went into Limp Mode.
I have plugged in the Diagbox and after clearing all the errors the following error comes back after 30 seconds of the car being on:
P0262. - Injector 1 Control - Intermittent short circuit between 2 wires.
Mileage is 64000 miles.

Is it a faulty Injector 1 that I need to replace?

[wheeler]

In all probability it is likely a faulty injector, all that fault code means though is there is a fault on that injector circuit, could in theory be a wiring or ECU issue. To confirm you could swap injector 1 with one of the other injectors to see if the fault moves to a different cylinder.
Just incase you are not aware Cylinder 1 is at the flywheel side of the engine.

[Paul-R]

You could try to narrow down the fault to the injector by measuring the resistance of the injector with a meter. As the fault is a short this should work regardless of whether the injector is a piezo type or an electromagnetic type. Compare the reading with one of the good injectors.

[findmak]

Replaced injector 1 and reprogrammed it, but the same error remains as above: P0262.
It's weird that if I don't start the car for a few days, the car doesn't go into limp mode for the first 20 seconds, but once I have started it, regardless of if I clear the errors it comes up with the errors and goes into limp mode straight away.

[Paul-R]

Are you sure you replaced injector 1? PSA numbers its engines from the gearbox end so the injector that's closest to to the water pump and auxiliary belt is not injector 1, it's injector 4.

[findmak]

Are you sure you replaced injector 1? PSA numbers its engines from the gearbox end so the injector that's closest to to the water pump and auxiliary belt is not injector 1, it's injector 4.

You know what I ended up doing, I changed the injector from the wrong side despite reading your notes.

Now I have flipped Injector 4 to 1, and put the replacement one in 4.

I have done stage 1 for the reprogramming via diagbox.
For stage 2 where you need to have a coolant temp of 80C and drive between 2600 to 1600 rpm. How long do each of the cycles take to complete?
I need to get 3 cycles for it to complete programming the injectors.

[Paul-R]

I'm sorry but I don't know how long the cycles take. I was just responding with general advice.

[findmak]

Hi guys,

So it was a pain to get the programming done.
Been driving the car since, and today I had the same errors lights come back on in the car, and the car went into limp mode.

Managed to drive it back home and checked it on the diagbox and it had the same error code: P0262. - Injector 1 Control - Intermittent short circuit between 2 wires.

I checked the Number of programming cycles for the injector it has incremented to 1 for the injector I installed and moved from 4 to 1.
I cleared the error and it has not come back.

Any ideas what could be causing that error to popup, or was it due to the injector just getting programmed?

[findmak]

Just an update, so I think injector 1 is gone, it is when the injector cools down the rod must re-join but when I drive the car for 1 mile when hot the error comes back.

Is it just a coincidence that the injector in injector 1 failed or is it something else causing that specific injector to fail?