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A170 Cdi fault code P1470

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by daddyscoob, Nov 12, 2012.

  1. daddyscoob

    daddyscoob Member

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    Further to the lack of power and not willing to rev over 3 k I have cleaned the egr valve, replaced a turbo pipe and changed the maf sensor.

    The problem is still there and having scanned the ecu I have the code P1470 charge pressure control.

    Can anyone help please !!!!!


    HELP !!!!!!!!!
     
  2. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

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    Your Mercedes:
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    too high or too low...??

    You have looked into the wrong areas from the start, this relates to turbo boost pressure. Have you had it on a STAR machine?
     
  3. OP
    daddyscoob

    daddyscoob Member

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    Hi Steve,
    It doesn't say high or low. It's an Àutoboss scanner. Would you have any idea of what could be wrong .
     
  4. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

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    Not without putting it on STAR.

    Charge pressure too high and its something like a blocked KAT and the engine cant breathe properly and too low means there is a leak on the charge pressure system from say a pipe or the intercooler.

    Either way STAR will be more definitive with its fault codes and there is lots of values you can check on live data along with turbo and charge pressure tests. A lot of the time its about having the right tools and knowledge to diagnose faults accurately.

    Making a stab at cleaning and replacing various components just makes it a longer and more expensive process.
     

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