Maxus Fault Code
Free · no signupP2264
Water-in-Fuel Warning Stuck On
System
Fuel / Sensor
Symptom
Water-in-Fuel Warning Stuck On
Diagnosis & fix steps
LOGIC: Water-in-Fuel (WIF) Sensor Self-Test Circuit Malfunction.
ACTION: Drain filter bowl. If water is absent, remove sensor probe from base of filter and clean conductive probe tips. Check sensor ground return wire for chassis oxidation.
Red Seal field insights
Electrolysis Corrosion: Water and road salt/brackish mud create high-resistance bridge shorting across the bottom sensor pins, locking the warning light on even after draining.
Same code keeps coming back?
That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.
Read before you touch anything
- This is general reference information, not a repair manual. It is for trained, qualified technicians.
- Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
- Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
- You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
- Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.
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