Nissan 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.

Nissan 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 independent garage cost: £100–£320.

What actually causes P0100 on a Nissan

Nissan Qashqai 2.0 petrol MAF is a known weak spot — fails reliably around 70k miles, often after a customer fits a non-OE air filter that lets dust through. Juke 1.6 petrol shares the issue. 1.5 dCi MAF (Renault-shared) suffers from EGR contamination as elsewhere. Always check the airbox lid clips on Juke — they pop loose and let unfiltered air past the MAF.

Nissan engines that log P0100

• MR20DE 2.0 petrol (Qashqai, X-Trail, Note)
• HR16DE 1.6 petrol (Note, Juke)
• 1.5 dCi K9K (Qashqai, Juke, Note)
• 1.6 dCi R9M (Qashqai, X-Trail)

How we diagnose P0100 on a Nissan

1. Consult / CLIP — read MAF live data
2. Inspect airbox seal, lid clips, and filter brand
3. Check intake pipework
4. Replace MAF with OE Hitachi (Qashqai 2.0) or Bosch (dCi)
5. Reset ECU adaptations

The common misdiagnosis to avoid

On Qashqai 2.0 petrol with P0100, check the air filter type — pattern (non-OE) filters with poor sealing cause repeat MAF failure. Sell a proper OE filter alongside the MAF replacement.

Nissan P0100 repair cost in the UK

Expect £100–£320 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

If you see a Qashqai or X-Trail with K&N or similar oiled air filter and P0100, that's almost always the cause — oil from the filter coats the MAF wire and skews readings. Educate the customer and fit a paper filter.

Codes usually seen alongside P0100 on Nissan

• P0101
• P0102
• P0299
• P0171

Symptoms drivers report with P0100

• Black smoke on diesel acceleration (over-fuelling because ECU can't trust the airflow reading)
• Rough or 'hunting' idle at traffic lights — RPM wanders between 700 and 950
• Hesitation off the mark, then a sudden shove of power as the ECU falls back to a default air-map
• MPG drops 5–10 in mixed driving — the ECU can't run closed-loop trims without valid MAF data
• Engine surges at steady 50–60 mph motorway cruise
• Sometimes resets itself after key-off / key-on and drives normally for a day
• Often stored alongside P0101 (range) or P0102 (low input) — same root cause

Repairs that clear P0100

• Clean MAF with dedicated cleaner spray
• Replace MAF sensor
• Inspect wiring and connector
• Replace air filter

For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0100 guide.