[IainG]

Hi
On my V50 one of the flexible pipes had perished inside the protective sleeving.(down near the hot exhaust) It was still giving a reading but very low. As it was a low reading Vida couldn't diagnose the fault and was suggesting it was an electronic (CEM)issue. Changed the pipes and all well. Worth checking the pipes for damage first as it is a cheap option. Also check the pipes are not blocked. Once you have proved they are intact it is easy to blow down each tube from the sensor end to check they are clear. I also tested mine by taking both pipes off at the sensor and putting the ends of the pipes in a glass of water. With the engine running you should get bubbles from the pipes. Higher the revs more bubbles. The deeper you can submerge the ends with bubbles still coming the higher the pressure. The pipe from the front of the DPF should have the higher pressure.