P1235: Positive boost pressure governor deviation
Had a few issues with my facelift 156 1.9 JTDm since it was parked up for the most part of 6 months. I have fixed the immobliser issue with a Inj. relay clean, a P1238 error with an EGR clean. Battery has been removed for a very long recharge.
The only issue to resolve is a P1235:
Failed Component Code: Positive boost pressure governor deviation
Fault Symptom: Positive governor deviation above limit
Warning Lamp Status: Warning Lamp Illuminated
Fault Test State: Test not complete for this Error.
Fault Code Storage State: Error Present at time of request
Event Count: 40 count
Environmental Condition One: Engine Speed: 3435.38 rpm
Environmental Condition Two: Fuel Quantity: 60.54 mm3/str
Environmental Condition Three: Accelerator Pedal: 71.76 %
Environmental Condition Four: Rail Pressure: 1521.54 Bar
Environmental Condition Five: Turbo Pressure: 1764.75 mBar
Environmental Condition Six: Engine Temperature: 91.63 °C
The car drives fine, but if you go for some heavy pedal you get the P1235 error. This then put the car into safety mode, and I have to reconnect AlfaDiag to clear this (only) error code. Now, I find it hard to believe the Turbo is dead. It has been idle, not thrashed. My other remedies were to do with cleaning something. Is there something to clean for a P1235 error ? I have read on the forum that it could be a split hose, but I have no idea where to look. Can somone please shed some light on this problem for me.