I have taken the inlet manifold off and examined if for damage.Note: Dismantled the old brake switch and found it to have been OK and probably not at fault.Reports suggest that this part often fails and, since it is part of the EPC logic, could cause this problem – despite replacing it the P0106 error still reoccurs. I replaced the brake switch above the brake pedal as suggested on the Skoda Fabia forums.The P0106 fault code continued to reoccur. All readings seemed reasonable and credible. The range of readings obtained was the same before and after. before and after the force sensor was replaced. I measured the manifold pressure, using the EngineCheckPro software, with the engine idling, accelerating and decelerating etc.I replaced the force (MAP) sensor on the inlet manifold as this is the sensor reads the manifold pressure.I measured the cylinder pressures in case there was a burnt valve creating some back pressure – no signs of that.This would effect the manifold pressure so I replaced the tube – better brakes but the P0106 error continued to reoccur. I found a crack in the tube between the throttle body and the brake servo.I also started examining simply everything and replacing the various parts and sensors that may be causing the P0106 code. Pulling the plug is not the ideal quick fix but this was the only way I could get out of LH mode and get home and then attempt a proper fix. At first I thought this may be due to a poor contact etc but it all checked out OK with a DVM. Oddly, the LH mode could be cleared if the wiring plug on the throttle body was disconnected and reconnected (with the engine off). The EPC light has come on many times but twice it has come on and the EMU immediately switched into the dreaded limp home (LH) mode. It has also occured whilst pulling out to overtake!!! - I rarely do that now in this car - I don't trust it!!

The fault seems to occur most often whilst negotiating small local roundabouts, usually just as pulling away from them. I find this strange, since having since bought a Ross-Tech and a Gendan 'Engine Check Pro' reader, a P0106 code is always written to the log after the EPC light has triggered. This begun whilst the car was still under warrentee but the Skoda garage said that no fault code had been written to the logs so they could not help.

The EPC warning light has been triggering fairly regularly for the past year+. I am one fed up Skoda owner (Fabia ’03, 1.4l, 16v).

Gendan Enginecheck