Nissan P1800 is a diagnostic trouble code for the Variable Induction Air System (VIAS) solenoid valve circuit. The code points to a problem in the circuit that controls the VIAS system. However, P1800 does not automatically mean that the solenoid has failed. A wiring fault or damaged electrical connector can also trigger the code. A … Read more
Nissan P0171 means the engine control system has detected a lean air fuel condition on Bank 1. In practical terms, the engine is receiving too much air, too little fuel, or incorrect airflow information compared with the amount of fuel the engine control module expects. The code does not identify one specific failed part, so … Read more
Nissan P1614 indicates a problem with the key recognition process in the Nissan Anti Theft System, also known as NATS. Nissan describes this code as “Chain of IMMU KEY.” The immobilizer uses this process to identify the ignition key and authorize engine operation. A communication or recognition problem can interrupt this process. As a result, … Read more
The Nissan P1421 code indicates that the Engine Control Module has detected an emissions related fault. Nissan uses this manufacturer specific code for certain models and engine configurations. Therefore, drivers should check the correct service information before replacing any component. The Check Engine Light may turn on when the ECM detects the fault. However, the … Read more
Nissan U1001 is a network communication code that indicates a problem within the vehicle’s Controller Area Network, or CAN system. This network allows electronic control modules to exchange data with each other. These modules include the Engine Control Module, Transmission Control Module, Body Control Module, and ABS control module. A communication failure between these modules … Read more
The Nissan B1049 code indicates a fault that requires attention to the Supplemental Restraint System. This system controls important safety functions, including the airbags. The control unit monitors its electrical circuits and records a fault when it detects an abnormal condition. B1049 may also trigger the airbag warning light on the dashboard. Several electrical problems … Read more
Nissan P0744 indicates a problem with the torque converter clutch lock up function. However, the code does not automatically mean that the transmission needs replacement. Several faults can cause this code. These include a faulty TCC solenoid, damaged wiring, or a faulty electrical connector. A control valve problem can also cause P0744. In some cases, … Read more
Nissan P1610 is a NATS “LOCK MODE” diagnostic trouble code. It can prevent the engine from starting. Nissan service information identifies P1610 with the vehicle’s anti theft system. The exact trigger depends on the Nissan model and NATS configuration. Some Nissan service manuals link P1610 to repeated starting attempts with an unregistered key. Other cases … Read more
Nissan P0101 is a diagnostic trouble code related to the Mass Air Flow sensor system. The MAF sensor measures the air that enters the engine. The Engine Control Module uses this data to control engine operation. When the system detects an abnormal air flow signal, it can trigger the P0101 code. A P0101 code does … Read more
Nissan P0335 is a diagnostic trouble code related to the crankshaft position sensor circuit. The code indicates that the engine control system has detected a problem with the crankshaft position signal during engine operation or starting. However, P0335 does not automatically mean that the crankshaft position sensor itself has failed. The fault can also involve … Read more