P3400 - chevorlet

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OBDIITech · Answer 1 · 2018-02-22T00:01:41+0000

Are there any other symptoms or codes?

Usually that code is combine with other codes, but if no other codes are present you may have a faulty Cylinder Deactivation Solenoid.

P3400 CHEVROLET - Cylinder Deactivation System Performance