p0299
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Volkswagen · SUVs
Turbocharger/Supercharger A Underboost Condition
Quick Answer
Error code P0299 on your Volkswagen SUVs means: Turbocharger/Supercharger A Underboost Condition. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
CAID4ID6B25N5N-LWBCRAtlas Cross Sport SE 2024Atlas Cross Sport SEL 2024Atlas Cross Sport SEL R-Line 2024Atlas SE 2024Atlas SEL 2024Atlas SEL Premium R-Line 2024ID.4 Pro 2024ID.4 Pro S 2024ID.4 Pro S Plus 2024ID.4 Standard 2024Taos S 2024Taos SE 2024Taos SEL 2024Tiguan S 2024Tiguan SE 2024Tiguan SEL 2024Tiguan SEL R-Line 2024
Likely Causes
How to Fix It
1
Inspect all charge pipes, intercooler connections, and boost hoses for leaks or loose clamps
2
Pressurize the intake system with a boost leak tester and spray soapy water to identify leaks
3
Check the wastegate actuator for free movement and proper vacuum/pressure response
4
Monitor actual vs. requested boost pressure during a road test with a scan tool
5
Inspect the turbocharger for shaft play, oil leaks, and compressor or turbine wheel damage
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
Parts You May Need
Charge pipes and intercooler hoses
Turbocharger wastegate actuator
Turbocharger assembly
Boost pressure sensor
Intercooler
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