P0299 on Kia
Turbo/Supercharger Underboost Condition
P0299 on Kia vehicles indicates turbo/supercharger underboost condition. Au7o has documented this code across 2 Kia models — most commonly on Sportage, Stinger. P0299 means the engine computer detected an underboost condition — the turbocharger or supercharger is producing less boost pressure than the PCM expects for the given conditions. The computer compares the manifold/boost pressure sensor reading to a target based on engine load, and when actual boost falls short, it sets this code. The most common real-world cause is a leak somewhere in the intake/charge-air path. You'll typically feel reduced power or sluggish acceleration, and the engine may go into a reduced-power mode. Typical repair costs on Kia range from $200 to $3,000, depending on the specific model and root cause.
Common Causes of P0299
- •Boost/intake leak (cracked or loose charge-air hose or intercooler)
- •Faulty or sticking turbo wastegate or actuator
- •Stuck or clogged variable-geometry turbo vanes (VGT)
- •Faulty boost pressure or MAP sensor
- •Leaking or disconnected vacuum/boost control lines
- •Restricted air intake or clogged air filter
- •Failed boost control solenoid
- •Worn or failing turbocharger
P0299 on Kia by Model
Kia Sportage(1 issue)
- Turbo Oil Feed Line Leak (1.6T)2017-2025
The 1.6L turbocharged engine in the Sportage develops oil leaks from the turbocharger oil feed line and its banjo bolt connection. The high heat environment around the turbo causes the oil line seals and crush washers to harden and leak. Oil drips onto the hot exhaust manifold and turbo housing, creating smoke and a burning oil smell. If the oil feed line is significantly restricted by carbon buildup, the turbo bearings can be starved of oil and fail.
Kia Stinger(1 issue)
- Left Turbocharger Oil Feed Pipe Leak / Fire Risk2018-2023
The left turbocharger oil feed pipe and hose assembly on the 3.3L twin-turbo V6 can deteriorate and leak oil onto hot engine components, creating a fire risk. NHTSA recall covers 2018-2023 Stinger GT models. The oil feed pipe material degrades over time from heat cycling. Kia replaces the left turbocharger oil feed pipe and hose assembly with an improved part.
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View P0299 across all makes →Frequently Asked Questions
What does P0299 mean on Kia?▼
P0299 stands for "Turbo/Supercharger Underboost Condition." P0299 means the engine computer detected an underboost condition — the turbocharger or supercharger is producing less boost pressure than the PCM expects for the given conditions. The computer compares the manifold/boost pressure sensor reading to a target based on engine load, and when actual boost falls short, it sets this code. The most common real-world cause is a leak somewhere in the intake/charge-air path. You'll typically feel reduced power or sluggish acceleration, and the engine may go into a reduced-power mode. On Kia specifically, this code is documented across 2 models.
What causes P0299 on Kia vehicles?▼
Common causes on Kia: Boost/intake leak (cracked or loose charge-air hose or intercooler), Faulty or sticking turbo wastegate or actuator, Stuck or clogged variable-geometry turbo vanes (VGT), Faulty boost pressure or MAP sensor, Leaking or disconnected vacuum/boost control lines. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0299 on a Kia?▼
Repair costs on Kia range from $200 to $3,000, depending on the specific model and root cause.
Which Kia models have P0299 documented?▼
Au7o has documented P0299 on 2 Kia models: Sportage, Stinger.