Hello. Recently I bought a V70 2.4L from 1999. The engine warning light was on, and the buyer showed me a printed document from a workshop, in which they read out the error code as “P1671 injection valve voltage too low”. It could also be “voltage too high”, I did not have the document right here. However, if I look on the Internet, all the information I find refers to a control valve problem, not to an injection valve problem. Today I have the control valve changed (I bought it from eBay, not original from Volvo), but the engine warning light went on again. Now I wonder two things: – Could it be that I connected the two cables wrongly? In my original plug there were no numbers 1 and 2, only in the new plug I bought from Volvo. I think I connected the green/orange cable to the pin 1. – Could this error not be caused by the control valve, but by the camshaft I have found some forum threads on the Internet that suggest this as another possible cause. I would say I sometimes hear a click noise from the area in which this sensor is placed, but I don’t know if this could point to a problem with it. Apart from the fact that the engine warning light concerns, starts and runs the car very uniformly. It’s mainly a problem because I have to pass the TÜV and that can’t do so, solan the engine warning light is lit.