Nissan Pathfinder R51 Factory Error Codes (DTC)

This guide provides a comprehensive overview of Diagnostic Trouble Codes (DTC) for the Nissan Pathfinder R51 (2005-2014). It covers how to accurately read and interpret error codes from the vehicle's onboard diagnostic system (OBD-II), pinpointing the exact nature of engine, transmission, ABS, airbag, and other electronic system malfunctions. With step-by-step instructions for diagnosing and troubleshooting common issues, this manual aids in the efficient identification and resolution of faults. Essential for both professional mechanics and DIY enthusiasts, it ensures a systematic approach to maintaining vehicle performance and reliability, helping you save time and avoid unnecessary repairs.

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• 1. P0420 - Catalytic Converter System Efficiency Below Threshold (Bank 1)

Causes:

Worn or damaged catalytic converter.

Oxygen sensor (lambda) problems.

Ignition or fuel system problems.

Solution:

Check and replace catalytic converter if necessary.

Check oxygen sensors and replace if necessary.

Diagnose ignition system and fuel injectors.

• 2. P0300 - Multiple Cylinder Misfires

Causes:

Faulty spark plugs or ignition coils.

Fuel delivery problems (clogged injectors, low fuel pressure).

Air intake system problems (vacuum leaks).

Solution:

Replace spark plugs and ignition coils.

Check fuel pressure and injectors, clean or replace them.

Check for vacuum leaks and repair them.

• 3. P0171 / P0174 - Mixture too lean (bank 1 / bank 2)

Causes:

Clogged or faulty injectors.

Problems with the mass air flow (MAF) sensor.

Leaks in the air intake system.

Solution:

Clean or replace injectors.

Check and, if necessary, replace the MAF sensor.

Diagnose and repair leaks in the intake system.

• 4. P0705 - Gear Selector Position Sensor Malfunction

Causes:

Incorrectly adjusted or faulty gear selector position sensor.

Problems with the sensor wiring.

Solution:

Check and, if necessary, replace the gear selector position sensor.

Check the wiring for damage or corrosion.

• 5. P1283 - Problem with the air injection system (mixture too rich)

Causes:

Faulty oxygen sensor.

Clogged or faulty injectors.

Fuel pressure regulator problems.

Solution:

Replace faulty oxygen sensors.

Clean or replace injectors.

Check fuel pressure regulator and replace if necessary.

• 6. P1446 - Evaporative Emission Control System (EVAP) Valve Problem

Causes:

Clogged or faulty EVAP valve.

EVAP system leaks.

Solution:

Check and clean or replace EVAP valve.

Check EVAP system for leaks and repair them.

• 7. ABS and stability control

Causes:

Faulty ABS sensors.

ABS wiring or control module problems.

Solution:

Check and replace faulty ABS sensors.

Diagnose wiring and control module, repair faults.

Regular diagnostics: Regularly perform diagnostics with an OBD-II scanner to detect and eliminate errors at an early stage.

Use of quality spare parts: Install original or quality analogs of spare parts, especially for the ignition system, fuel system and exhaust system.

Regular maintenance: Monitor the condition of the car systems, replace fluids and filters according to the regulations, perform preventive cleaning of components.