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P0411 Diagnostic and Fix for 2006 Pontiac Grand Prix - Air Injection System Issue

Model: Pontiac Grand Prix Fault Code: P0411 Posted: 2015-06-11 15:51

Hello. I have a 2006 Pontiac Grand Prix and am experiencing recurring P0411 diagnostic trouble code. I recently replaced the vacuum pump relay, but the code has returned. After further research, I believe the P0411 code relates to the air injection system, not the vacuum pump. I would like to confirm whether there may be issues with air injection components such as hoses or a faulty diverter valve. Any advice on how to properly diagnose and repair this issue would be greatly appreciated.

Related fault codes
P0411
Comments (1)
Anonymous 2015-06-14 12:25

The P0411 code specifically refers to the air injection system, not the vacuum pump. Please inspect all air injection hoses and ensure the diverter valve is functioning properly. A clogged or faulty component in this system is a common cause of this code.