2008 VW Jetta P0299 Code: Turbocharger Underboost After N75 Valve Replacement

I've been troubleshooting my 2008 Volkswagen Jetta and am still encountering the P0299 diagnostic trouble code, which indicates a turbocharger underboost condition. I recently replaced the N75 solenoid valve—commonly cited as the primary cause of this issue—and cleared the code from the ECU. However, after driving around, the engine light returns with the same P0299 code. Despite the replacement, the problem persists. I'm looking for advice on potential next steps or other possible causes. Any insights would be greatly appreciated.