Nissan B24bd-14 -

The Nissan code B24BD-14 is a diagnostic trouble code (DTC) indicating a specific fault in the HVAC system: a short or open circuit in the Right Air Mix Door Motor drive signal.

Maintenance Snapshot

• Oil capacity: 6.5 L with filter (recommend CI-4 or CK-4 15W-40 diesel oil)
• Valve adjustment: Intake 0.25 mm / Exhaust 0.30 mm (cold), every 500 hours
• Injection timing: 12° BTDC static (check with dial indicator on #1 injector line)
• Fuel filter: Cartridge type (Nissan 16405-43G00), change every 400 hours

Immediately press and hold the Recirculation, Rear Defrost, and A/C buttons for 5 seconds. nissan b24bd-14

• Verify all tires are at the correct PSI (found on the driver's door jamb).
• Use a TPMS scan tool to ensure all 4 sensors are transmitting. If a sensor is dead, replace it and re-register the ID. Sometimes clearing the sensor code clears the B24BD-14 lamp circuit code as well.

Environmental & Regulatory Notes (CARB/EPA)

If you are in California or any state following CARB (California Air Resources Board) rules, pay close attention. The Nissan B24BD-14 is often labeled as a "Large Spark Ignition (LSI) Engine." Before buying a used forklift with this engine, check the emissions label. The "-14" confirms it meets Executive Order U-S-XX for LPG. Without that label, you may not be able to bring the machine onto a regulated job site. The Nissan code B24BD-14 is a diagnostic trouble

Inspect Wiring: Look for damaged or loose connectors at the HVAC unit. Corroded wiring is a common cause for DTCs. Oil capacity: 6