Toyota Fault Code
Free · no signupP1264
Engine misfire; Rough running; White smoke; Loss of power.
System
Not specified
Symptom
Engine misfire; Rough running; White smoke; Loss of power.
Diagnosis & fix steps
Injector Circuit Malfunction (Cylinder Specific).
LOGIC: The EDU (Electronic Driving Unit) detects an electrical fault in the injector solenoid.
ACTION: 1. Check the EDU box (usually on the fender).
2. Inspect the injector harness under the valve cover for heat damage.
FIX: Replace the Injector EDU or the specific fuel injector.
Red Seal field insights
The EDU converts battery voltage to high voltage to fire the injectors. If the mounting bolts are loose, the EDU loses its "case ground" and can throw false injector codes.
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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