Posted by Craig Hayes on November 2, 2009, 8:28 am
Had trouble with this vehicle for a few weeks now. Customer complains that vehicle will drive ok but then will lose all power and drive flat with no turbo boost. He then pulls over switches off/on & vehicle then drives ok again. On scanning over vehicle with KTS we pulled out fault code p0033 - Boost Pressure Control-open cicuit. We have checked all vacuum lines, tried new EGR Valve, Boost Pressure Sensor & Turbo Control Solenoid Valve. Checked turbo actuator with mityvac which seemed to be moving quite freely, checked Air Mass Sensor signal which shows good range. Vehicle coming back to us today with the same complaint but annoying because it can drive fine for anything up to 4 days before fault appears. We are starting to think that we will need to remove turbo for testing of wastegate (had this problem with Vag group but not with Renault)
Any ideas or help would be greatly appreciated Craig