What are the common causes of P2BA7?

An empty or very low diesel exhaust fluid tank. A failed reductant level sensor. Crystallized or gelled diesel exhaust fluid blocking the level sensor. A dosing unit unable to draw reductant from the tank.

Check the diesel exhaust fluid level and top off the tank. Inspect the level sensor for crystallization or damage. Scan for reductant level and dosing related codes. Check diesel exhaust fluid quality and confirm it is not frozen or gelled. Clear the code and retest after the tank reads a valid level.

P2BA7 NOx Exceedance - Empty Reagent Tank

Category: Powertrain - Hybrid Propulsion
Severity: Check Engine Light
System: Powertrain control (P code)

What does P2BA7 mean?

P2BA7 stands for NOx Exceedance - Empty Reagent Tank. It is a powertrain control fault, so the computer saw a problem in the engine, transmission and emissions systems. Work through the cause list below, cheapest checks first.

Common causes of P2BA7

An empty or very low diesel exhaust fluid tank
A failed reductant level sensor
Crystallized or gelled diesel exhaust fluid blocking the level sensor
A dosing unit unable to draw reductant from the tank

How to fix P2BA7

Check the diesel exhaust fluid level and top off the tank
Inspect the level sensor for crystallization or damage
Scan for reductant level and dosing related codes
Check diesel exhaust fluid quality and confirm it is not frozen or gelled
Clear the code and retest after the tank reads a valid level