Hello UKATSearched archive on C3 and couldn't find anything on this one and I apologise in advance if there is? So just in case you get one in the future.
On the C3 the offside washer jet is situated directly over Injector No.1 and over time, due to a very loose fitting washer jet in the bonnet, rain water and screenwash alike runs back and seeps under the jet and drips on Injector 1 causing it to short out.
Replacement is £66.00 + vat (Retail) and £61.00 + vat (Trade)
This part can be replaced without any configuration procedure required. Obviously it would be advisable to seal washer jet to avoid repetition.
This vehicle was on a 52 plate and I understand this may have been modified on later models.
Kind regards
Andy Amor