Underboost or boost pressure lower than commanded. This page groups every component report connected with P0299, so a mechanic can move from the error code to the relevant OEM numbers, defect symptoms and fitment checks.
A fault code alone is not a parts order. Confirm with live data, VIN, installed OEM number, connector and part photos before quoting or fitting.
The same code can appear with different root causes. Use the OEM number and symptom pattern to choose the right branch.
Early HE400VG variable-geometry turbo used on DAF XF/CF MX engines. The repeated reports point to hot-side vane binding, actuator travel errors, oil-coked bearings and underboost complaints.
Later HE400VG turbo group for DAF XF/CF MX-13 and selected MX-11 Euro 6 applications. Main search intent is OEM replacement matching plus diagnosis of underboost, VGT actuator errors and bearing wear.
HE500VG turbo group for high-output DAF MX-13 Euro 6 trucks. The reports repeatedly connect these OEM numbers with VGT actuator mismatch, soot-bound vanes, bearing wear and smoke complaints.
High-output MX-13 530 hp HE500VG turbo group. Useful for exact OEM searches around 2117463, 2301181, 2353021 and 2403671.
Electric VGT actuator used with Holset HE400VG and HE500VG turbochargers on DAF MX Euro 6 engines. It is often blamed for boost faults, but the source reports stress that the turbo vane mechanism must be checked first.
HY35W wastegated turbo group for DAF LF and CF with Cummins ISBe 5.9L engines. Failure patterns are mainly shaft play, oil starvation and sticky wastegates.
HX35W turbo group for DAF LF with Cummins ISBe6 6.7L engines. The repeated reports focus on bearing and seal failure, oil in charge pipes and underboost on motorway grades.
Use these links when the workshop note only contains an OE number instead of the exact part family.
| Model | Engine | Years |
|---|---|---|
| XF 106 | MX-13 Euro 6 | 2013-2017 |
| CF 85 | MX-13 Euro 6 | 2013-2017 |
| XF 106 | MX-11 Euro 6 | 2013-2023 |
| CF 430 | MX-11 Euro 6 | 2013-2023 |
| XF 106 | MX-13 Euro 6 / EPA17 | 2017-2023 |
| CF 85 | MX-13 Euro 6 | 2017-2022 |
| CF 480 | MX-13 Euro 6 | 2017-2023 |
| CF 530 | MX-13 Euro 6 | 2017-2023 |
| XF 106 | MX-11 Euro 6 | 2017-2023 |
| XF 106 | MX-13 Euro 6 | 2013-2018 |
| CF 85 | MX-13 Euro 6 | 2013-2017 |
| CF 480 | MX-13 Euro 6 | 2013-2023 |
| XF 106 | MX-13 Euro 5/6 | 2014-2023 |
| XF 106 | MX-11 / MX-13 Euro 6 | 2013-2023 |
| CF 85 | MX-11 / MX-13 Euro 6 | 2013-2022 |
| CF 430 | MX-11 Euro 6 | 2017-2023 |
| LF 45 | Cummins ISBe 5.9L Euro 3/4/5 | 2001-2012 |
| LF 55 | Cummins ISBe 5.9L Euro 3/4/5 | 2001-2012 |
| CF 65 | Cummins ISBe 5.9L Euro 4/5 | 2001-2012 |
| LF 55 | Cummins ISBe6 6.7L Euro 4/5 | 2005-2013 |
| LF 45 | Cummins ISBe 6.7L Euro 4/5 | 2006-2013 |
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Direct references from fleet operators in your country — available on request.
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