DTC P0404: EGR Open Position Performance: Description

Powertrain Control Module (PCM) monitors Exhaust Gas Recirculation (EGR) valve pintle position input to ensure that valve responds properly to commands from PCM. PCM compares EGR position sensor with desired EGR position when valve is commanded open. DTC sets when difference between EGR position sensor and desired EGR position is more than 15 percent.