CUSTOMER CONCERN The electric parking brake is stuck on or will not apply, with a parking-brake motor circuit fault. CAUSE The confirmed repair found the parking-brake motor connector terminals reversed, causing the motor to run in the wrong direction. CORRECTION Correct the parking-brake motor connector terminal positions, clear the parking-brake fault, and verify normal apply and release operation.

CUSTOMER CONCERN The hybrid system stores isolation-fault DTCs P0AA6-49 and P1C80-49 for the rear motor area. CAUSE Corrosion in the high-voltage floor under-wire harness caused the documented isolation fault. CORRECTION Remove and replace the corroded high-voltage floor under-wire harness, clear DTCs P0AA6-49 and P1C80-49, and verify high-voltage isolation and hybrid-system operation.

CUSTOMER CONCERN After collision repairs and replacement of the front bumper and steering rack, the intuitive park-assist warning remains on and the EPS system stores U023A-87. CAUSE The replacement steering rack/EPS and clearance-warning system had not been fully configured, and the front ultrasonic-sensor angles had not been registered. CORRECTION Configure the EPS and clearance-warning ECU, perform front ultrasonic-sensor angle registration, clear U023A-87 and related Repo

CUSTOMER CONCERN The engine control module stores DTC P2681-15 for the coolant-flow control circuit. CAUSE The confirmed repair identified a failed coolant flow control valve; Toyota's updated valve was specified for the condition. CORRECTION Remove and replace the failed coolant flow control valve with the updated Toyota unit, clear DTC P2681-15, and verify coolant-flow control operation.

CUSTOMER CONCERN The vehicle was towed in with a no-start condition and DTC P0AA6 for a high-voltage isolation fault. CAUSE The 12-volt auxiliary battery measured only 8.3 volts and would not retain a charge; the confirmed report also found sleep-current draw at approximately 0.03 mA. CORRECTION Remove and replace the failed 12-volt auxiliary battery, clear DTC P0AA6, and verify the vehicle enters READY mode normally.

CUSTOMER CONCERN DTC C051D54 sets after rear brake-pad service. CAUSE The multi-axis acceleration sensor zero-point calibration was missing after the rear brake service. CORRECTION Perform the acceleration-sensor zero-point calibration, clear DTC C051D54, and verify normal brake-system operation.

CUSTOMER CONCERN After collision damage and grille-shutter replacement, the system reports that initialization is incomplete; the original fault was P059F73 for a shutter stuck closed. CAUSE The replacement active grille shutter had not completed its required initialization. CORRECTION Place the grille-shutter system in normal run mode, cycle the ignition to complete active grille shutter initialization, clear the stored fault, and verify normal shutter operation.

CUSTOMER CONCERN Warning lights come on intermittently and DTC P261B sets because engine water-pump speed is below the commanded value. CAUSE A defective aftermarket electric engine water pump could not maintain the commanded pump speed. CORRECTION Remove and replace the defective aftermarket electric water pump with an OEM-quality pump, clear DTC P261B, and verify commanded and actual pump speed remain consistent.

CUSTOMER CONCERN A 12-volt battery warning appears, the vehicle will not drive, and DTC P300000 is stored for hybrid battery discharge control. CAUSE The confirmed repair identified a failed 12-volt auxiliary battery. CORRECTION Remove and replace the failed 12-volt auxiliary battery, clear DTC P300000, and verify the vehicle enters Ready mode and drives normally.

CUSTOMER CONCERN The check-engine light returns with DTC P05A074 for active grille shutter actuator slipping after body repairs. CAUSE The active grille shutter assembly was missing the cover cap that retains the actuator, allowing the actuator and louver mechanism to slip. CORRECTION Remove and replace the damaged active grille shutter assembly, clear DTC P05A074, and verify the shutter completes its active test without slipping.

CUSTOMER CONCERN The check-engine light is on with DTC P0441 for incorrect EVAP purge flow. CAUSE The confirmed repair identified a failed canister purge control solenoid valve. CORRECTION Remove and replace the failed canister purge control solenoid valve, clear DTC P0441, and verify the EVAP monitor completes without resetting the code.

CUSTOMER CONCERN The air conditioning blows cold with the gasoline engine off but stops cooling when the engine runs. CAUSE The confirmed repair identified lost air-conditioning servomotor initialization as the cause of the temperature-control problem. CORRECTION Perform the air-conditioning servomotor initialization with the scan tool and verify cold air is maintained with the gasoline engine both off and running.