Cruze P0299: causes to check before replacing the turbo
The short answer
P0299P0299 means “Engine Underboost” in GM’s code list: the engine is producing less boost than expected.
For LUJ/LUV Cruze engines, GM lists faults in hoses, restrictions, control components and the turbo itself. The repair targets the component shown to have failed. The stored code starts the diagnosis; replacement of the turbo assembly rests on specific mechanical findings or the prescribed boost test.
| Model year | Model | Engine RPO | GM bulletin / pages | Revision |
|---|---|---|---|---|
| 2011–2016 | Cruze | 1.4L LUJ / LUV | PIP5495N · PDF 1–3, 7–9 | 2021 |
| 2011–2016 | Cruze | 1.4L LUJ / LUV | 19-NA-090 · PDF 1–2 | 2019-05 |
Does this reference cover your vehicle?
- Model year
- 2011–2016
- Model
- Cruze
- Engine RPO
- 1.4L LUJ / LUV
- GM bulletin / pages
- PIP5495N · PDF 1–3, 7–9
- Revision
- 2021
- Note
- —
- Model year
- 2011–2016
- Model
- Cruze
- Engine RPO
- 1.4L LUJ / LUV
- GM bulletin / pages
- 19-NA-090 · PDF 1–2
- Revision
- 2019-05
- Note
- —
In this guide
Where GM looks for the lost boost
PIP5495N starts with the control system and air path: broken solenoid ports, obstructed hoses, restrictions at the air filter or inlet duct, and the condition of the wastegate linkage. A broken solenoid port is repaired with a replacement solenoid; restrictions and hose faults receive their corresponding correction.
GM supports assembly replacement for findings such as a disconnected wastegate lever or pin, a seized linkage, and a turbo wheel that will not rotate. When inspection leaves the cause unresolved, GM’s professional boost-control test compares actual boost with the command. That test is reserved for the technician and is unsuitable as an owner road experiment.
Source: PIP5495N · PDF 1
Oil consumption with P0300 is a separate branch
19-NA-090 covers oil consumption or leakage with P0300, a misfire and low compression on listed LUJ/LUV engines. GM identifies possible piston ring-land damage and uses compression and cylinder-leakage testing to isolate it. The repair decision then depends on piston and cylinder-wall condition. Oil near the turbo, on its own, leaves the failed assembly unidentified.
Source: 19-NA-090 · PDF 1
What the quote should show
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A complete quote names the failed component, the test or inspection supporting it, and the planned verification after repair. Itemize the diagnostic charge, parts and labor separately so that two quotes describe comparable work. The explanation should name the finding that turns P0299 into a parts order.
The GM code label is cited from 22-NA-224. That bulletin supplies the definition here; its vehicle-specific repair procedure is outside this Cruze application.
Source: PIP5495N · PDF 1 · PIP5495N · PDF 7