P00B0: Turbocharger/Supercharger Boost Control B Module Performance

Boost control B here is an electronic actuator with its own electronics (a "smart" actuator), usually on the variable turbine geometry, with its own position sensor and controlled over a data bus or a pulsed signal. It checks itself and reports internal faults to the engine control module; documented examples are pattern errors, overcurrent and checksum errors. The control module cannot narrow down a fault inside the actuator further. B denotes the second, separate actuator. P00B0 is set when actuator B reports an internal fault. No manufacturer description naming this exact code was found; the explanation follows its documented counterpart.

Symptoms

• Check engine light on
• Loss of power or limp mode with reduced boost

Most likely causes

• Electronics or motor inside the actuator faulty
• Sector gear or vane mechanism sticking (soot, coking), causing overcurrent
• Weak supply or ground, corroded connector
• Software of actuator or control module

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the hoses, clamps, and intercooler
2. Compare the reading with other engine data while varying the engine speed.
3. Compare commanded and actual pressure in live data
4. Check the actuator's movement
5. Check the vacuum hoses and the solenoid valve
6. Check the oil and the turbo shaft play before replacing it

Good to know

• Repair difficulty: hard
• It can trigger limp mode.
• It affects emissions.

What each character of P00B0 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• 0: Subsystem depends on the code range
• B0: Specific fault in that system

Frequently asked questions

Can I keep driving with code P00B0?

Drive without demanding power and go to a repair shop soon. If you see a lot of blue smoke or hear a metallic noise, shut off the engine.

What causes code P00B0?

The most common causes are: electronics or motor inside the actuator faulty; sector gear or vane mechanism sticking (soot, coking), causing overcurrent; weak supply or ground, corroded connector.

Related codes

• P00AFTurbocharger/Supercharger Boost Control A Module Performance
• P003BTurbocharger/Supercharger Boost Control B Position Exceeded Learning Limit
• P004BTurbocharger/Supercharger Boost Control B Circuit Range/Performance
• P0234Turbocharger/Supercharger A Overboost Condition
• P0299Turbocharger/Supercharger A Underboost Condition

Sources

• law.cornell.edu: 13 CCR 1968.2
• gsi.ext.gm.com: 18OBDG04 Engine Diagnostics

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.