P2BBF

Turbocharger/Supercharger Bypass Valve A Supply Voltage Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–167 (est.)

Symptoms

Loss of engine power
Unstable engine operation
Check engine light comes on
Reduced turbocharging efficiency
The engine goes into emergency mode

Causes

Open or short circuit in the wiring to the valve
Oxidation or damage to electrical connectors
Malfunction of the bypass valve (solenoid) itself
Problems with the relay or circuit fuse
Engine control unit (ECU) malfunction

How to Fix

Visual inspection of wiring and connectors for damage and corrosion
Checking the voltage and resistance in the valve circuit with a multimeter
Checking fuses and relays associated with the boost system
Replacing a faulty bypass valve if necessary
Diagnostics and flashing of the ECU if a software error is suspected

Related codes

P2BC0 P2BC1 P003A