Nissan OBD Codes
decoded & explained
The codes Nissan owners actually see — MAF, PCM memory, speed sensors and catalysts — with clear causes and fixes.
Nissan check engine light codes
Nissan uses standard OBD-II engine codes, readable with any scanner. Deeper module work uses Consult/Consult3+, but the vast majority of engine faults are fully readable generically.
Here are the codes most reported on Qashqai, Sentra, Altima, Rogue, Leaf and Navara models.
OBD-II code decoder
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Most common Nissan
Classic Nissan faults behind these codes.
| Code | Description |
|---|---|
| P0101 | Mass Air Flow (MAF) Sensor Range/Performance |
| P0171 | System Too Lean (Bank 1) |
| P0300 | Random/Multiple Cylinder Misfire |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1) |
| P0442 | EVAP System Small Leak Detected |
| P0455 | EVAP System Large Leak |
| P0500 | Vehicle Speed Sensor Circuit Malfunction |
| P0605 | PCM Internal Read Only Memory Error |
Common Nissan faults
Classic Nissan faults behind these codes.
MAF range (P0101) — dirty or failing MAF sensor, common across Nissan models.
PCM memory (P0605) — battery/electrical related, sometimes needs PCM update.
Speed sensor (P0500) — faulty VSS or ABS sensor, common on older models.
EVAP leaks (P0442/P0455) — fuel cap or hoses.
Misfires (P0300) and lean mixture (P0171) — coils, plugs or vacuum leaks.
Nissan FAQ
What causes P0101 on a Nissan?
Is P0605 serious?
Why does my Nissan show P0500?
Are Nissan and Infiniti codes the same?
Can I read Nissan codes with a phone?
Codes vary slightly by model, year and engine. Always confirm with a proper diagnosis. Manufacturer-specific codes (P1xxx/P2xxx) may differ from generic descriptions.
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Use the free decoder below, or browse the most common Nissan codes.