Error code 3185 injection fault ?

hello
my d2 td5 auto seems to have a problem ...

when i was driving it started to play up and i think it was miss-firing !

i got home and pluged the hawkeye in and it came up with a error

3185 INJECTOR 3 PEAK CHARGED LONG LOGGED

any ideas???????

i reset it with hawkeye and it was fine for around 2 miles and did the same pluged in hawkeye same fault.

any info would be great guys !!

i have checked the injec harness and seems to be fine 75000 on the clock and its a eu3 engine

Anthony