SES Code P0404

[TFEnt]

Anyone know what the SES P0404 code means??

[SoMnDMAX]

EGR problem.

Snipit from the SES description, courtesy of the GM service CD-

"If the EGR vacuum sensor signal is lower than desired and the MAF rate is higher than expected, it is assumed that the EGR valve is not opening enough due to a vacuum problem and Diagnostic Trouble Code (DTC) P0404 sets."

[mdrag]

SSmokeybear,

From www.obdii.com

General Motors P0404 EGR System

Good luck.

[TFEnt]

Thank you Guys!