Subaru Fault Code

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P2764

AT Oil Temp Flashing / Hard Shudder

System

Transmission / CVT

Symptom

AT Oil Temp Flashing / Hard Shudder

Diagnosis & fix steps

LOGIC: Lockup Duty Solenoid Circuit Low (Open/Resistance High). ACTION: Drain CVT fluid, drop the valve body, and test the lockup duty solenoid resistance directly across its terminals (spec: 10–14Ω). Replace the solenoid or complete valve body assembly; perform a fluid level check at 35–45°C.

Red Seal field insights

Valve Body Resistance: Thermal cycling degrades the internal copper winding inside the lockup solenoid on top of the transmission, causing an open circuit without mechanical friction failure.

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.

Book an uptime review

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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