Code P132B (Turbocharger Boost Control A Underboost) on the 6.7L Power Stroke means the turbo boost control is under-delivering versus the commanded target. This guide covers what triggers P132B, how to diagnose it, and the parts that fix it.
What P132B means
P132B on the 6.7L Power Stroke points to the VGT boost-control system underperforming - commonly the turbo actuator or a sticking VGT.
Common causes
- A failing turbo actuator
- Soot-stuck VGT vanes
- Boost leaks in the plumbing
- Worn turbo
Symptoms you'll notice
- Underboost and lost power
- Limp mode in severe cases
- Excess smoke
How to diagnose it
Compare commanded vs actual VGT position and test the actuator. Check the charge-air plumbing for leaks and the turbo for bearing wear.
The fix
Replace or recalibrate a failed actuator, free or replace a soot-stuck VGT, and fix any boost leak. Match the part to your exact year and control soot and heat.
Frequently asked questions
Is P132B the actuator?
Frequently - the turbo actuator is a common cause, along with a sticking VGT. Diagnose vane position before buying a turbo.
Can I drive with P132B?
It may enter limp mode. Diagnose promptly to restore boost.
Need the part?
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