P226A OBD-II: Water in Fuel Lamp Control Circuit

OBD II Fault Code

• OBD II P226A

OBD-II Code Powertrain Control Module (PCM) failure is defined as a Water in Fuel Lamp Control Circuit

Diesel vehicles have a sensor built into the fuel system to detect excessive water contamination in the fuel. There is a separate warning light "Water in Fuel" that should illuminated for the first few seconds when the engine is started and then go out. If the engine control module (PCM) cannot control the warning light, it will set code P226A.

Powertrain Control Module (PCM) failure Symptoms

• Water in fuel warning light doesn't illuminate on initial startup

Common Problems That Trigger the P226A Code

• Powertrain Control Module (PCM) failure
• Water in fuel bulb failure
• Wiring issue