Turbo underboost on Kia — 1.6 CRDi U2 and 1.0/1.4 T-GDi VGT actuator or split charge pipes.
Kia P0299 — Turbo underboost on Kia — 1.6 CRDi U2 and 1.0/1.4 T-GDi VGT actuator or split charge pipes. Typical UK independent garage cost: £180–£1200.
What actually causes P0299 on a Kia
Kia U2 diesel P0299 is the same actuator-failure story as the Hyundai sister engine. Always check Kia's 7-year warranty cover before chargeable work.
Kia engines that log P0299
- 1.6 CRDi U2 (Ceed/Sportage)
- 1.0 T-GDi (Picanto/Stonic)
- 1.4 T-GDi (Ceed/Stonic)
How we diagnose P0299 on a Kia
- Verify Kia warranty cover by VIN
- Smoke-test charge air
- Sweep VGT actuator
- Read commanded vs actual boost
The common misdiagnosis to avoid
Kia dealers default to full turbo under warranty — out of warranty, indie can fit the actuator alone.
Kia P0299 repair cost in the UK
Expect £180–£1200 including parts and labour at an independent garage. Main-dealer quotes on Kia 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
Kia 1.6 CRDi P0299 — warranty check first. If in cover, refer to main dealer; if out, actuator-only fix.
Codes usually seen alongside P0299 on Kia
- P0234
- P2563
Symptoms drivers report with P0299
- Loss of power above 2,000–2,500 RPM — car feels flat overtaking on the motorway
- Limp mode kicks in at 3,000 RPM, resets after a key cycle, then returns within 10 miles
- Whistling from engine bay under load — split intercooler pipe or Y-piece
- Black smoke or fuel smell from the exhaust on diesels — VNT stuck open, over-fuelling
- Paired codes: P0234 (overboost, VNT stuck closed), P0299 with P0401 (EGR + boost overlap), P0299 with P132B (turbo boost control)
Repairs that clear P0299
- Smoke-test the boost system first (cheap and finds most causes)
- Clean VNT vanes with rocker-arm actuation
- Replace boost sensor
- Replace turbo as last resort
For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0299 guide.