Circuit/System Description
The engine control module (ECM) tests the exhaust gas recirculation (EGR) flow when the EGR is In operation. EGR desired flow is compared to EGR actual flow. If EGR flow deviation is detected, DTC P0401 or P0402 will set.
The engine control module (ECM) tests the exhaust gas recirculation (EGR) flow when the EGR is In operation. EGR desired flow is compared to EGR actual flow. If EGR flow deviation is detected, DTC P0401 or P0402 will set.