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Discussion Starter #1
So bought a van around 6 month ago, all fine, then started to intermittently go into limp mode throwing up eml, spanner light and glow plug light. plugged it in and its showing the p0235 code, which is turbo boost sensor a circuit. iv seen a few people have had this problem but never seems to be any answers to as it got fixed and if it did how?

im currently in France and garages cost a fortune here so if I can help it id like to avoid that!

have checked vacuum pipes from turbo into boost solenoid, replaced boost pressure sensor.

is it worth me buying a new boost solenoid or would it be wasting more money?

Cheers in advance
 

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Could really do with ssome more info on what vehicle it is,..
If this is a Astra H van with the 1.9 cdti engine,.. if it is the check the plug on the boost control solenoid for corroded pins, they do suffer from this due to poor mounting position.,
 

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Could really do with ssome more info on what vehicle it is,..
If this is a Astra H van with the 1.9 cdti engine,.. if it is the check the plug on the boost control solenoid for corroded pins, they do suffer from this due to poor mounting position.,

sorry, I did post in a different section but looks like iy got moved. its vivaro.

took egr off a cleaned today, still no difference
 

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Do you have a diagnostic tool thats capable of live data, logging the boost is the best way to diagnose this fault. You could be suffering from over or underboost, there are ways to diagnose a faulty solenoid but your really need live data.
 

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Do you have a diagnostic tool thats capable of live data, logging the boost is the best way to diagnose this fault. You could be suffering from over or underboost, there are ways to diagnose a faulty solenoid but your really need live data.
Yes my obd reader can read live data, its just im not really sure what the numbers should be etc
 

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It should give you a Desired and Actual boost reading for you to compare as you drive.
 

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Do you still have the old sensor, if you do then see what that reads,.. if its the same then it sounds like wiring mate.
 

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Do you still have the old sensor, if you do then see what that reads,.. if its the same then it sounds like wiring mate.

Yeh its the same. After working on the van all day that's the conclusion iv come to today.
any idea of common spots where the wiring could rub or wear away??
 

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Ok, check what voltage you have at the sensor plug, you should have battery voltage on the Brown wire, the other wire which is Gray is the ground control from the ecu.
 

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Ok, check what voltage you have at the sensor plug, you should have battery voltage on the Brown wire, the other wire which is Gray is the ground control from the ecu.
Ok thanks, will check tomorrow. Thanks for your help, really appreciate it! will Let you know what its saying
 

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Ok, check what voltage you have at the sensor plug, you should have battery voltage on the Brown wire, the other wire which is Gray is the ground control from the ecu.
Theres 3 wires going into the plug, what would the third be?
 

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Sorry mate that was the wiring for the control solenoid o_O The wiring for the map sensor is Beige wire in terminal 1 is the 5v reference, White wire in Terminal 2 is the Signal wire and the Violet wire in Terminal 3 is the ground from the ecu
 

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Sorry mate that was the wiring for the control solenoid o_O The wiring for the map sensor is Beige wire in terminal 1 is the 5v reference, White wire in Terminal 2 is the Signal wire and the Violet wire in Terminal 3 is the ground from the ecu
have tested today and none of it seems to be getting any power, just need to find out where the problem in the loom is, any ideas where it runs? after the sensor it goes out of site
 

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Not sure mate is my honest answer, your going to need to remove the airbox and trace the loom around, its probably rubbed through on the gearbox.
 
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