EVAP gross leak on Nissan — fuel cap and EVAP canister vent solenoid on Qashqai/Juke/Micra.
Nissan P0455 — EVAP gross leak on Nissan — fuel cap and EVAP canister vent solenoid on Qashqai/Juke/Micra. Typical UK independent garage cost: £25–£280.
What actually causes P0455 on a Nissan
Nissan P0455 — fuel cap, then vent solenoid (on canister, under rear of car). Rust on vent valve common in UK salted-road areas.
Nissan engines that log P0455
- Qashqai J10/J11 1.6 HR16/2.0
- Juke 1.6
- Micra K12/K13
How we diagnose P0455 on a Nissan
- Fuel cap test
- Inspect vent solenoid for corrosion
- Smoke-test EVAP
- Replace solenoid if corroded
The common misdiagnosis to avoid
Vent solenoid is exposed to road spray on Qashqai — corroded ones fail intermittently. Replace, don't repair.
Nissan P0455 repair cost in the UK
Expect £25–£280 including parts and labour at an independent garage. Main-dealer quotes on Nissan are usually higher for the same job, and the spread exists because the cheap cause and the expensive cause throw the same code — pay for the diagnosis before you pay for parts.
Bob's workshop tip
Qashqai P0455 — vent solenoid + fresh cap. Standard combo job.
Codes usually seen alongside P0455 on Nissan
- P0441
- P0456
Symptoms drivers report with P0455
- Engine warning light appears within a mile of filling up — sometimes the cap wasn't clicked shut
- Strong smell of petrol vapour around the car after parking on a hot day
- MPG barely affected — you'll only notice on the fuel receipts over a month
- MOT emissions test passes but the MIL means an MOT visual fail on any car registered 2018+
- Paired codes: P0440 (generic EVAP), P0441 (purge flow), P0446 (vent circuit), P0455 keeps returning
Repairs that clear P0455
- Refit fuel cap
- Inspect hoses
For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0455 guide.
Reading P0455 on a Nissan properly
A generic reader will show P0455 and nothing else. What matters is the freeze-frame data stored with it — engine speed, load, coolant temperature and fuel trims at the moment the fault was logged — plus whether any other module on the Nissan has logged something at the same time. Codes rarely arrive alone, and the order they were stored in usually points at which one is the cause and which are the consequences.
Clearing P0455 without fixing it
Erasing the code resets the Nissan's readiness monitors as well as the light. The fault returns on the next drive cycle if the cause is still there, and in the meantime the incomplete monitors can stop the car passing an emissions check. After a genuine repair, the car is driven until the relevant monitor completes before it is handed back.
Bob's Mechanical Repairs is an independent garage in Birnam, Dunkeld, Perthshire, with 32 years of Bob's experience on the tools. If P0455 is showing on your Nissan, bring any scan results with you — we will read the live data ourselves, confirm which cause it actually is, and price the repair before any work starts.