Turbo Underboost
Can I Drive?
Short Distances Only
DIY Difficulty
advanced
Estimated Cost
$900-$7,500
What does MAXXFORCE-P0299-13 mean?
The MAXXFORCE-P0299-13 (MaxxForce) diesel fault code means: Turbo Underboost. This is a serious severity code.
Common Symptoms
- Derate
- Low power
- Black smoke
Probable Causes (Ranked by Likelihood)
- VGT vane failure Very Likely
- High-pressure turbo failure Likely
- DPF restriction Possible
Step-by-Step Diagnostic Procedure
Read turbo actuator feedback.
Replace VGT actuator cartridge.
Frequently Asked Questions
What is P0299 on a MaxxForce 13 (12.4L)?
P0299 on a MaxxForce 13 (12.4L) (2008-2014) indicates: Turbo Underboost. This is a known fault code on the MaxxForce engine family and typically points to the causes listed above.
Can I drive with P0299 on my MaxxForce?
Only drive short distances to reach a repair facility. Continued operation may cause further damage or progressive derate.
How much does it cost to fix MaxxForce P0299?
Repair cost is typically $900-$7,500 depending on the underlying cause and shop rate. Many MaxxForce faults (especially EGR cooler, head bolt, and VGT repairs) are major expenses that drove fleet owners to repower with Cummins or retire these trucks early.