What are the common causes of P226A?

An open or short in the water in fuel lamp driver wire. A burned out water in fuel lamp bulb. A corroded lamp socket or connector pin. A water in fuel sensor that will not trigger the lamp. A bad ground in the lamp circuit.

Command the water in fuel lamp on with a scan tool and watch it. Check the lamp bulb and socket. Test the lamp driver wire for opens and shorts. Inspect the lamp connector and ground for corrosion. Replace the lamp or sensor that fails the command test. Clear the code and retest.

P226A

Water in Fuel Lamp Control Circuit

System: Injector circuits (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P226A means Water in Fuel Lamp Control Circuit.

Check these first

An open or short in the water in fuel lamp driver wire
A burned out water in fuel lamp bulb
A corroded lamp socket or connector pin
A water in fuel sensor that will not trigger the lamp
A bad ground in the lamp circuit

What to do next

Command the water in fuel lamp on with a scan tool and watch it
Check the lamp bulb and socket
Test the lamp driver wire for opens and shorts
Inspect the lamp connector and ground for corrosion
Replace the lamp or sensor that fails the command test
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.