Peugeot 307 2.0 16v: Fixed Permanent Error P0108, Idle Engine Jerking, MAP Sensor Swap

Check the MAP signal wire and the rest of the wiring first, because P0108 means the ECU sees the manifold pressure signal too high, which can be caused by a short to plus, an open circuit, bad wiring, or even a damaged ECU rather than a bad MAP sensor [#16308210][#16310629] With ignition on and engine off, the MAP should show atmospheric pressure; in the thread the value was 1080, and at that point the fault should normally be erasable, which again points to wiring or ECU if it is not [#16312864][#16314885] Measure the signal against ground and compare the scanner reading with a real vacuum gauge on the running engine, because the ECU may be reading atmospheric pressure instead of manifold vacuum [#16308210][#16314885] Also verify the sensor supply and connector installation, and inspect the intake system for false air or a hole in the manifold [#16308132] If the wiring and intake are correct and the reading still stays wrong, the ECU itself becomes a likely suspect [#16310629][#16314885]