2007 Audia A4

Previously would have trouble starting after filling the gas tank and run rough, but then be fine.

Most recently would crank and not start.

Replaced: Vapor Canister Purge Valve and replaced camshaft position sensor

Now it starts. Ran fine for a test drive.

But now it has the EPC light on with more check engine codes.

Go them to clear and it ran fine, but then again today EPC light and codes.

Codes:

P0444 Evaporativ Emiss. System Purge Control Valve Circ. :Open No Signal/Communication



P0033 Turbo Charger Bypass Valve Control Circuit No Signal/Communication



P0243 Turbo/Super Charger Wastegate Solonoid A No Signal/Communication



P1573 Left Electro-Hydraulic Engine Mount Solenoid Valve:Open Circuit No Signal/Communication



P2295 Fuel Pressure Regulator 2 Control Circuit Low Lower Limit Exceeded



P2400 Evaporative Emission System Leak Detection Pump Control :Circuit/Open No Signal/Communication



Any thoughts on what to do? I think its related to the vapor canister purge value / electronics somehow....

 

It seems like you've encountered a series of challenging issues with your 2007 Audi A4, and your suspicion regarding the Printed Circuit Board (PCB) and the vapor canister purge valve might hold some merit.

Given the multitude of codes related to signal and communication issues, it's crucial to inspect the wiring and connections associated with the affected components, including the PCB. These codes often indicate a disruption in the electrical circuitry.

Additionally, consider having a professional technician perform a thorough diagnostic scan to identify the root cause precisely. With their expertise, they can pinpoint the source of these electrical anomalies and address them effectively.

By thoroughly examining the PCB connections and associated wiring, you may find the solution to these persistent issues. Please keep us updated on your progress.

Best regards,