What Nissan codes (P1212, P0420, P0299, P0401, P0106, P0100) actually mean on Nissan engines — the real cause, the common misdiagnosis, and the honest UK repair cost.
These are the OBD fault codes we see most often on Nissan vehicles in the workshop, with the real cause on Nissan engines rather than the generic textbook definition, plus the honest independent-garage cost.
Nissan fault codes explained
- P1212 — ABS / VDC / TCS warning — on Nissan Qashqai and Juke this often pairs with brake servo / vacuum pump failures. Typical UK cost £140–£600.
- P0420 — Catalyst efficiency on Nissan petrol — the front cat-back O2 sensor is the weakness on Micra K12, Note E11 and Qashqai J10. Typical UK cost £180–£700.
- P0299 — Turbo underboost on Nissan — 1.5 dCi (shared with Renault) suffers turbo oil starvation. 1.6 dCi has known turbo failures. Typical UK cost £400–£1800.
- P0401 — EGR flow insufficient on Nissan 1.5/1.6 dCi (Renault-derived) — Qashqai, Juke and Note all suffer the same EGR carbon as their Renault siblings. Typical UK cost £150–£680.
- P0106 — MAP sensor performance on Nissan 1.5 dCi, 1.2/1.6 DIG-T, and 2.0 petrol — sensor failure on Qashqai/Juke common, plus charge-pipe leaks. Typical UK cost £100–£360.
- P0100 — MAF circuit malfunction on Nissan — 2.0 petrol Qashqai and 1.5/1.6 dCi MAF sensor failures plus airbox seal issues on Juke. Typical UK cost £100–£320.
- P0011 — Intake cam over-advanced on Nissan — MR20DE/QR25DE/VQ35DE timing chain stretch and OCV faults are the headline causes. Typical UK cost £140–£1800.
- P0171 — System lean on Nissan — Qashqai/Juke 1.6 HR16 and 1.2 DIG-T MAF and intake leaks. Typical UK cost £25–£450.
- P0455 — EVAP gross leak on Nissan — fuel cap and EVAP canister vent solenoid on Qashqai/Juke/Micra. Typical UK cost £25–£280.
- P2002 — DPF efficiency below threshold on Nissan — 1.5/1.6 dCi K9K (Qashqai/Juke) DPF clogging. Typical UK cost £180–£1600.
Codes are generic across manufacturers, but the fix is not. The same code on a Nissan usually points at a different component than it would on another make, which is why a make-specific diagnosis saves money before any parts are bought.