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I'm running out of ideas and solutions online to resolve my daughter's check engine light. The code scanner detects the following problems:

1. 17833 – Evap purge valve short to ground
2. 17525 - Oxygen sensor heating circuit short to ground
3. 17843 – secondary air pump relay short to ground
4. 17881 – evap leak detection pump open
5. 16486 - mass air flow sensor signal too low

In addition to the check engine light, the letters "EPC" are illuminated (which I believe is a separate issue).

Changed the Evap purge valve but didn’t resolve that code.
Looked for a more systemic problem hoping that the fuel pump relay was causing all of these. Changed the fuel pump relay and the codes are still there.

(I'm using a vGate Scan VS450 scanner for VW/Audi to read the codes)

Does anyone have any suggestions?

Thanks,

Bob
Beaver, PA
2002 VW Beetle, 2.0L, AVH (engine code), 117,000 miles.
2001 Eurovan MV Weekender
2014 Passat SE, TDI
 

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