What does code P1401 mean?

Q: What does code P1401 mean?

EGR Temperature Sensor. P1401 on Nissan vehicles indicates that the engine control module (ECM) has detected an abnormal signal from the exhaust gas recirculation (EGR) temperature sensor circuit. The ECM monitors this sensor to verify EGR flow and temperature, and it sets the code when the sensor voltage or resistance falls outside the expected range for the current operating conditions.

DTC codes / Nissan codes / P1401

P1401 · NissanEGR Temperature Sensor

P1401 on Nissan vehicles indicates that the engine control module (ECM) has detected an abnormal signal from the exhaust gas recirculation (EGR) temperature sensor circuit. The ECM monitors this sensor to verify EGR flow and temperature, and it sets the code when the sensor voltage or resistance falls outside the expected range for the current operating conditions.

SystemPowertrain

Code typeNissan specific

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for Nissan vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.