Peugeot RCZ 2.0hdi turbine overboost

[Manokayote]

Good evening, I have a 2010 Peugeot RCZ with the 2.0 HDi 160 hp engine (engine code RHH). While dismantling components to access the valve lifters (which I needed to replace), I accidentally disconnected the hoses from the turbo control solenoid valves. I reassembled the engine and the car runs, but it’s throwing a fault because the turbo is overboosting. Most likely, one of the turbo control hoses or the hose leading to the turbo has been swapped with another one. I am looking for advice—ideally a diagram showing exactly where each hose should go—or photos of the back of the engine for comparison. The car ran quite well otherwise; using a diagnostic tool, I measured the required vs. actual airflow from the turbo to the engine, and it doesn't seem to cut the turbo off when it should—it's pushing nearly a bar over the target pressure. I would greatly appreciate any help. Best regards.

[mickthemaverick]

I'll have a look on my backup system tomorrow and see if I can find some info, not available to me at the moment !

[mickthemaverick]

There are two possible piping diagrams depending on your RPO number. Here are both options for pre and post RPO 12383: You can find your RPO on the door sticker with tyre pressures.

rcz pipes pre 12383.pdf

Up to RPO 12383

(160.75 KiB) Downloaded 3 times

rcz pipes since 12383.pdf

Since RPO 12383

(161.06 KiB) Downloaded 3 times