jrdnodd said:

I'm back and still suffering from my car running in limp mode...

I've just ran a diagnostics test and received the following codes-

P0401 - Exhaust Gas Recirculation "A" Flow Insufficient Detected

P0234 - Turbocharger "A" Overbost Condition

I haven't been able to use my car to it's full potential since purchasing and was wondering whether anyone had any experience with these problems and found a solution.

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Bernievarian said:

Hi Mattyo,

should have told us, you probably have your wastegate not opening, generating an overboost situation that pops-up the P0234 and put the engine in safe (limp) mode.

Verify all (small) pipings near the turbo:

- there is a 3 way valve controled by the ECU
- when boost is too high, this valve opens the wastegate with turbo's high pressure output
- when boost back to normal, the valve return the pressure from wastegate actuator to turbo's low pressure inlet
- a broken or disconnected pipe will cause the wastegate not opening, thus overboosting
- a bad menbrane in the actuator would have the same effect
- a seized wastegate also ...
- and finally, an obstructed pipe aswell ...


Regards, Bernie

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