MAP sensor range/performance on VW TSI/TDI — boost-pressure sensor failure is common, plus charge-pipe leaks on 1.4/2.0 TSI.
Volkswagen P0106 — MAP sensor range/performance on VW TSI/TDI — boost-pressure sensor failure is common, plus charge-pipe leaks on 1.4/2.0 TSI. Typical UK independent garage cost: £100–£320.
What actually causes P0106 on a Volkswagen
The combined MAP/IAT sensor (Bosch part) on 2.0 TSI EA888 engines is a famously short-lived component — fails consistently around 60k–80k miles. On 1.4 TSI EA111 the issue is more often a split charge pipe (the same plastic pipe that causes P0299) or a leaking PCV diaphragm. TDI engines fail the sensor too but at higher mileage.
Volkswagen engines that log P0106
- 1.4 TSI (Golf, Polo, Tiguan, Caddy)
- 1.8/2.0 TSI (Golf GTI, Passat, Tiguan)
- 1.6/2.0 TDI CR (Golf, Passat, Caddy, Tiguan)
How we diagnose P0106 on a Volkswagen
- VCDS — log MAP sensor voltage vs commanded boost during a road test
- Inspect charge pipes and intake hoses for splits (especially the plastic 'doughnut' pipe on 1.4 TSI)
- Check PCV valve diaphragm — common 1.8/2.0 TSI failure
- Replace MAP/IAT sensor as a starting point if EA888 over 50k miles
- Recheck logged readings post-fix
The common misdiagnosis to avoid
VW dealers sometimes quote a complete turbo system check (£300+ labour) when the £45 MAP sensor is the obvious culprit on a 60–80k mile EA888 — refuse and ask them to swap the sensor first.
Volkswagen P0106 repair cost in the UK
Expect £100–£320 including parts and labour at an independent garage. Main-dealer quotes on Volkswagen 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've got a 2.0 TSI over 60,000 miles, just replace the MAP/IAT sensor as a preventative when it's in for any other intake work — the sensor is £45, fits in 3 minutes, and almost every one will fail by 90k miles anyway.
Codes usually seen alongside P0106 on Volkswagen
- P0299
- P2279
- P00BD
Symptoms drivers report with P0106
- Sudden loss of power on a motorway slip road — car drops into limp mode at exactly the point you plant the throttle
- Full power returns after a key-off / key-on cycle, then disappears again 10–20 miles later
- Whistling, hissing or a chuff-chuff noise from the engine bay under acceleration
- Slight oil mist around intercooler pipework or a stain on the underside of the bonnet
- MPG drops 4–8 mpg within a tankful, sometimes with faint black smoke on hard acceleration
- Sometimes paired with P0299 (underboost), P0234 (overboost), or P0401 (EGR flow)
Repairs that clear P0106
- Clean or replace MAP sensor
- Smoke-test intake and boost pipes
- Check EGR isn't stuck open
For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0106 guide.
Reading P0106 on a Volkswagen properly
A generic reader will show P0106 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 Volkswagen 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 P0106 without fixing it
Erasing the code resets the Volkswagen'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 P0106 is showing on your Volkswagen, 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.