P0203 error - Citroen Xsara Picasso SX 1.6 petrol 2001

[Moog]

Hi,

The engine management light popped on today for a couple of trips and then didn't reappear.

My OBD11 scanner is showing P0203 which I think is injector 3.

It does hunt a bit sometimes on overrun - going downhill on a light throttle. But always to some extent has when it's due a service.

I'm guessing it's just what the code says - injector?
It's overdue a service anyway with new plugs - I had to leave them in due to finances last year.

Could it be as simple as gammy plugs or realistically an injector? Car has 99k on the clock.

I've tried simple things like Redex.

I've cleared the code and the light has stayed off for now.

Thanks!