P0299 on Chevrolet: Turbocharger or Supercharger Underboost
Severity: 2 of 4
Drive gently to a shop. Many vehicles go into reduced power mode, which can be unsafe when merging. If you see blue smoke, hear grinding from the turbo, or the oil warning comes on, park it, because turbo failure can damage the engine.
Estimate range covers the repairs listed below; see the cost breakdown. A flashing check engine light, a hot temperature gauge, or brakes that feel different mean stop driving and get help.
What P0299 usually means on a Chevrolet
GM issued guidance on 1.4 liter turbo engines for oil consumption and PCV system faults, and owners and shops connect PCV problems on this engine with lean and boost codes. Cracked intake hoses and wastegate problems are also seen.
Most likely causes on Chevrolet vehicles
- Boost hose or intake leak
- PCV or valve cover issue
- Wastegate
- Turbocharger
Order reflects cost and likelihood in general; your vehicle may differ. Confirm with testing before buying parts.
Chevrolet specific tips
- Inspect the intake path between the turbo and throttle body.
Estimated repair cost
This is an estimate, built from typical parts price ranges plus labor hours times an assumed shop rate of $110 to $190 per hour. Actual prices vary by vehicle, region, and shop. Diagnosis fees are often extra.
| Repair | Parts | Labor | Estimate (low / high) |
|---|---|---|---|
| Intercooler hose or clamp | $20 to $200 | 0.5 to 2.0 h | $20 + 0.5 × $110 = $75 $200 + 2.0 × $190 = $580 |
| Boost control valve | $40 to $250 | 0.5 to 1.5 h | $40 + 0.5 × $110 = $95 $250 + 1.5 × $190 = $535 |
| Turbocharger | $600 to $2,500 | 3.0 to 8.0 h | $600 + 3.0 × $110 = $930 $2,500 + 8.0 × $190 = $4,020 |
Costs are generic for this code; parts and labor on some Chevrolet models may run higher.
Watch a repair video
Search YouTube for “P0299 Chevrolet fix” videos. Pick a recent video that matches your engine, and confirm the diagnosis before buying parts.
Repair manuals
Step-by-step service manuals for Chevrolet with torque specs and wiring diagrams:
Haynes manuals for Chevrolet Chilton manuals
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Check Chevrolet recalls
Enter your VIN at the NHTSA recall lookup before paying for repairs.
FAQ
Is P0299 serious on a Cruze?
Not usually immediately, but reduced power can be unsafe in traffic.
Read the full P0299 guide or more Chevrolet check engine notes.