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.