DTC code

P0401: Exhaust Gas Recirculation Flow Insufficient

Vehicle-specific published guides for this diagnostic trouble code.

Exhaust Gas Recirculation Flow Insufficient

P0401 means the engine computer may be seeing less EGR flow response than expected when it commands EGR operation.

Article vehicle: 2020 25 Chevrolet Silverado 2500 6.6 diesel

P0401 may mean the PCM is seeing less EGR flow than expected during an EGR flow monitor.

Article vehicle: 2011-2025 Ford F250 Superduty 6.7 Power Stroke Diesel

P0401 means the PCM may be detecting less exhaust gas recirculation flow than expected.

Article vehicle: 2015-2025 Ford F150 2.7 EcoBoost

P0401 may mean the PCM is seeing less EGR flow than expected when the EGR system is commanded on.

Article vehicle: 2015-2025 Ford F150 3.5 EcoBoost

P0401 may mean the PCM is commanding EGR flow but is not seeing the expected engine response.

Article vehicle: 2019-2025 Ram 1500DT 3.6PentastarGas

P0401 may mean the PCM commanded EGR operation but did not see the expected system response.

Article vehicle: 2019-2025 Ram 2500HD 6.4HEMIGas