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Discussion Starter · #1 ·
Drove my big turbo 1.8t for the first time today after storing for winter im now throwing a n75 boost pressure regulator valve code but I have a Aem boost controller any thoughts before I start diagnosing tomorrow? Havent looked into it too much just pulled the code tonight. Code is 17956
00 jetta 1.8t unitronic stage 3 630 file
 

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Yes it never threw a code last summer which is why it's weird I may chase some wires to check for mice damage or something
Let us know what you find. Could be mice damage. Check the N75 resistor ( Ohm meter ) and terminal of course to make sure that resistor hasn't failed or you have corrosion in the terminal.
 
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