Turbo Pressure Too High (Error Code Read As)

[guygamps]

Hi, car has gone in to limp home mode twice with an error which when read is "turbo pressure too high".  Each time it clears after about 20 mins, and next day enginer warning light goes out.  On this occasion I managed to get it to a mechanic who read the error code before it clear.

Engine is 2.2 HDi

 

Car is a 2009 model

 

Any ideas?  driving soon from London to Geneva so don't want the car giving any issues on a trip like that

 

Guy

[Rookie2]

Hi Guygamps

 

My frst port of call would be the turbo eletro control valve, You will probably have two of these one for the turbo and one for the egr, they are usually identical as on my C8 2.2.

 

The valves control the vacuum going to the turbo which increases/decreases the amount of boost to the engine.

If you follow the thin rubber tube fro the turbo back up the engine, you will eventually come to the electro valve. t usually sits right alongside the egr electro valve and it is possible, as a test, to swap the two electro valves over so the do each others jobs.

 

Check the small vacuum pipes for splits/leaks/perishing etc. Also make sure that the actuator rod from the solenoid to the turbo itself moves freel and is not sticking in or out.

 

This si the type of valve you are looking for http://www.ebay.co.uk/itm/TURBO-SOLENOID-ELECTRO-VALVE-FOR-PEUGEOT-307-407-CITROEN-C4-C5-2-0-HDI-161842-/331093325106?hash=item4d16b33532:g:gH8AAOSwirZTxVXL

Edited January 16, 2017 by Rookie2

[paul.h]

I would also check the MAP sensor which measures the turbo pressure - it might be bunged up with oil or be faulty giving a high reading. When the engine management light comes on a fault code is generated and stored on the ecu until it has been deleted using a code reader, so no need to hope the light is still on when you go to a garage. There will also be freeze frame data stored giving the sensor values at the time of the fault and these may give a clue what is wrong. It is a pity/surprising the garage did not do these checks for you whilst it was plugged in.

 

The MAP sensor might be part  1920LH, as well as the part you should check any connections/pipes are clean. As an example so you know what it looks like http://www.ebay.co.uk/itm/CITROEN-DS3-1-4-HDI-70-FROM-2010-AIR-MANIFOLD-PRESSURE-MAP-SENSOR-FACET-/171819159020