P2BB2

Alternative Fuel Tank Empty

Severity

✅ Low

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–89 (est.)

Symptoms

Switching to alternative fuel is not possible
Check Engine Light Is On
Lack of alternative fuel supply
Unstable operation on alternative fuels

Causes

A truly empty alternative fuel tank
Alternate fuel level sensor malfunction
Level sensor wiring problems
Alternate system fuel pump malfunction
Error in the control unit software

How to Fix

Fill the alternative fuel tank
Check the fuel level sensor readings
Diagnose the alternative fuel level sensor circuit
Test the fuel pump of the alternative system
Reboot or update ECU software

Related codes

P2BB0 P2BB1 P2BB3