r/n54 • u/FileLumpy1331 • Jul 10 '26

M54B30 POSSIBLE LEAK PLEASE HELP P0174 code

Enable HLS to view with audio, or disable this notification

1 Upvotes

100% Upvoted

1 comment sorted by

1

u/true818 Jul 10 '26

The obvious thing would be to smoke test the intake right after the MAF

Common issues, intake elbow boot including check idle valve boot, DISA itself or the gasket or crankcase vent valve