Crank/cam correlation on Mini Cooper S — Prince N14/N18 timing chain stretch is one of the best-known faults in the trade.
Mini P0016 — Crank/cam correlation on Mini Cooper S — Prince N14/N18 timing chain stretch is one of the best-known faults in the trade. Typical UK independent garage cost: £900–£1900.
What actually causes P0016 on a Mini
Prince engine timing chain stretch is so common that 'death rattle' is a recognised term in Mini circles. P0016 confirms what your ears already know — the chain has slipped enough that crank and cam are no longer in correct phase. Left untreated, the chain skips teeth and bends valves. Symptoms: 5+ second cold-start rattle, lumpy idle, eventual P0014/P0017 partners.
Mini engines that log P0016
- N14 1.6 turbo (Cooper S R56 2007–2010)
- N18 1.6 turbo (Cooper S 2010–2014)
- N12/N16 1.6 (Cooper non-S)
How we diagnose P0016 on a Mini
- Cold-start engine and time the rattle — under 2 seconds is borderline, 5+ seconds is a definite chain replacement
- Scan tool: confirm P0016 and check for partner codes P0011/P0014/P0017
- Inspect the upper chain guide via oil filler with a borescope if available — broken guide debris is a giveaway
- Plan full chain kit + guides + tensioner + VANOS as a single job
- After replacement, fresh LL-04 oil and reset all adaptations
The common misdiagnosis to avoid
Avoid garages quoting 'chain replacement' without listing guides, tensioner, sprockets and a fresh VANOS unit — half-jobs come back within a year. Insist on the genuine BMW/Mini chain kit, not pattern parts.
Mini P0016 repair cost in the UK
Expect £900–£1900 including parts and labour at an independent garage. Main-dealer quotes on Mini 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 a customer brings in a Mini with chain rattle but no codes yet, that's the sweet spot — replace now (£900–£1,200) before it skips a tooth and bends valves (£2,500+).
Codes usually seen alongside P0016 on Mini
- P0011
- P0014
- P0017
Symptoms drivers report with P0016
- Loud metallic rattle for the first 2–4 seconds of a cold start — the classic 'death rattle'
- Long cranking before the engine catches, especially after standing overnight
- Rough lumpy idle at traffic lights, occasionally stalls
- Stop/Start stops working (ECU disables it once cam correlation drifts)
- Turbo feels lazy or flat below 2,000 RPM — timing is retarded to protect the valvetrain
- MPG drops 4–8 mpg with no other obvious cause
- Code P0011, P0014, P0017 or P0341 stored alongside P0016
Repairs that clear P0016
- Measure cam-to-crank deviation with manufacturer-aware scan tool
- Plan full timing chain kit if stretched
- Replace cam phaser if mechanically faulty
For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0016 guide.
Reading P0016 on a Mini properly
A generic reader will show P0016 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 Mini 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 P0016 without fixing it
Erasing the code resets the Mini'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 P0016 is showing on your Mini, 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.