Toyota Camry: U250E Automatic Transmission Solenoid Pack Failure

The ACV40 Camry uses the Toyota U250E five-speed automatic transmission. The solenoid pack within the valve body controls hydraulic pressure routing for each gear clutch pack. The solenoids are vulnerable to varnish buildup from degraded transmission fluid, particularly in vehicles that have not had regular fluid changes. Failed or sticky solenoids cause erratic shift quality ranging from harsh engagements to slip, delayed upshift, or the transmission defaulting to a limp-home mode locked in third gear. Solenoid No.1 (S1) and the lock-up solenoid are the most frequently reported failures. Valve body removal is required for solenoid replacement; a full fluid flush and new filter are mandatory at the same service.

• Harsh or delayed engagement when selecting Drive or Reverse from Park, particularly when cold
• Transmission slipping or flaring between gears — engine RPM rises momentarily without a corresponding increase in vehicle speed
• Transmission entering limp mode (locked in 3rd gear) after a warm-up period, with the OD-off or sport indicator flashing
• Torque converter shudder felt as a high-frequency vibration through the floor at 60–80 km/h light throttle cruise

1. 1

   Drive the vehicle through all gears including kickdown from 100 km/h.

2. 2

   Note any flare (RPM rise without speed gain) between 2nd and 3rd, harsh clunk engaging Drive from Park, or torque converter shudder at highway cruise.

3. 3

   Scan for transmission fault codes P0750–P0760 series (shift solenoid faults).

4. 4

   Check transmission fluid condition — black, burnt-smelling fluid with metal particle contamination is a strong indicator of solenoid or clutch pack failure.

Parts involved: Mechatronic / valve body.

$1,400 to $4,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Has the automatic transmission fluid ever been changed and if so when and how many kilometres ago?”
• “Does the transmission ever flare between gears, enter limp mode, or engage harshly from Park?”
• “Have any transmission fault codes been stored or cleared?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.