What are the Possible Causes of the DTC P1401 Nissan?
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Faulty EGR Temperature Sensor
EGR Temperature Sensor harness is open or shorted
EGR Temperature Sensor circuit poor electrical connection
Malfunction of EGR function, EGRC-BPT valve or EGRC-solenoid valve
Blocked EGR passages
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How to Fix the DTC P1401 Nissan?
Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1401 Nissan code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
When is the Code Detected?
An excessively low voltage from the Exhaust Gas Recirculation (EGR) temperature sensor is sent to Engine Control Module (ECM) even when engine coolant temperature is low, or an excessively high voltage from the EGR temperature sensor is sent to ECM even when engine coolant temperature is high.
What are Code Possible Symptoms?
Engine Light ON (or Service Engine Soon Warning Light)
Code P1401 Nissan Description
The Exhaust Gas Recirculation (EGR) temperature sensor detects temperature changes in the EGR passage way. When the EGR valve opens, hot exhaust gases flow, and the temperature in the passage way changes. The EGR temperature sensor is a thermistor that modifies a voltage signal sent from the Engine Control Module (ECM). This modified signal then returns to the ECM as an input signal. As the temperature increases, EGR temperature sensor resistance decreases.
This sensor is not used to control the engine system. It is used only for the on board diagnosis.
P1401 Nissan Code - EGR Temperature Sensor
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