A 1999 vectra with the 2.0 di 16v low blow turbo lump. Ive had the fault code p1335 come up on the scanner which means the injector pump is receiving no rpm signal from the ecu. Just wondered if anyone else has had the same problem or knows what the actual problem is?? I was thinking a broken wire or a sensor playing up?! Any help appreciated! Many thanks in advance!

Sam.