Ford Transit 2009: Possible knock sensor defects and experiences with workshops

Hey, I know exactly what you mean. I had a similar problem with my 2006 Ford Focus and it was actually the cable/connector that was faulty. The symptoms were similar to yours, the engine light came on and the power was also affected. It took a few tries to figure it out because there could be so many possible causes. But after replacing the cable/plug, the car was running smoothly again. It was a serious issue, so I would suggest getting it checked as soon as possible. Hope this helps you!

(Translated from German)

Thanks for your reply. It seems like you had a similar problem to the one I'm having right now. It sounds like replacing the cable/plug solved your problem. Do you remember how much you had to pay for it? Has anything else come up since the repair? Thanks a lot!

(Translated from German)

Yes, exactly, after the cable/plug was replaced, everything worked like clockwork again. It cost me €95 to replace it, which seemed fair to me. And I can reassure you, since I've been to the mechanic and the knock sensor malfunction has been fixed, nothing else has cropped up. So, fingers crossed that it works the same for you!

(Translated from German)

Great, thank you for the information! I'm reassured to hear that nothing else has come up since your repair. I'll take my Transit to the garage as soon as possible and hope that it's just the cable/plug. Your experience has really helped me. Thanks again!

(Translated from German)