Turbo/super boost fault code, what does it mean?

[Spathodus77]

Hi,

The engine management light came on in my wifes 06 Citreon xsara picasso earlier this week. She drove it a couple more times and the light went out. I have now checked the ECU for fault codes and it has logged "P0238 Turbo/super boost sensor A circuit high input".

Please can someone enlighten me as to what could be wrong? Given that the light went out should I clear the code and see if the engine management light comes on again?

Thanks,

Ralph

[stevieturbo]

Possibly a minor overboost at one point.

Clear it and drive away. It could just be a one off, or a lead up to a potential problem.

[Spathodus77]

Cheers, code reset and a couple of drives undertaken with no issues yet (touch wood etc)...

[GVK]

Could be MAP sensor itself, faulty wastegate solenoid (common apparently) leaking pipework to said solenoid or at worst the turbo itself with sticking wastegate. I worked on one last year and it was the turbo.. very intermittent fault and awkward to diagnose!