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Hi, are there any procedures on the Internet showing where to look or what to test to try and fix this fault code?
Thanks

Vehicle: 2007 Volkswagen T5 2.5L

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This code is the ECM reference shorted to power, The only fix is subsitute with a known working ECM.
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P0653 VOLKSWAGEN - Sensor Reference Voltage 'B' Circuit High

Read more: https://www.autocodes.com/p0653_volkswagen.html

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