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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission System (UA80F) - Diagnostic Codes (2 Of 2) & Symptom Tests >> Automatic Transaxle System >> DTC P08BA-7F: Pressure Control Solenoid "L" Actuator Stuck Off [12/2019 - 10/2022] >> Description

DTC P08BA-7F: Pressure Control Solenoid "L" Actuator Stuck Off [12/2019 - 10/2022]: Description

Based on signals from the transmission revolution sensors (NT and NC), the actual gear is detected.

The ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical malfunctions of the solenoid valves, transmission valve body assembly and automatic transaxle assembly (clutch, brake, gear, etc.).

HINT: 

ACTUAL GEAR WHEN SOLENOID (SL6) VALVE MALFUNCTION OCCURS (WITHOUT FAIL-SAFE CONTROL):

ECM commanded gear 1st 2nd 3rd 4th 5th 6th 7th 8th
Actual gear during SL6 stuck ON malfunction 1st N* 3rd 4th 5th 6th 7th N*
Actual gear during SL6 stuck OFF malfunction N* 2nd 3rd 4th 5th 6th 7th 8th

*: Neutral

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P08BA-7F Pressure Control Solenoid "L" Actuator Stuck Off All of the following conditions are met (2-trip detection logic):
  • Engine coolant temperature is 40°C (104°F) or higher.
  • ATF temperature is -10°C (14°F) or higher.
  • The vehicle is being driven with the shift lever in D.
  • No malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SL, SLU and SLT) valves, transmission revolution sensors (NT and NC), coolant temperature sensor, oil temperature sensor, knock sensor, crankshaft position sensor circuits, electronic throttle or CAN communication system.
  • Any of the following conditions are met:
    • When the ECM commands the transaxle to shift to 2nd or 8th gear, the engine overruns (neutral status)
    • When the ECM commands the transaxle to shift to 1st gear, the engine overruns (neutral status).
  • Solenoid (SL1) valve
  • Solenoid (SL2) valve
  • Solenoid (SL3) valve
  • Solenoid (SL4) valve
  • Solenoid (SL5) valve
  • Solenoid (SL6) valve
  • Solenoid (SL) valve
  • Solenoid (SLU) valve
  • Solenoid (SLT) valve
  • Transmission valve body assembly
  • Torque converter assembly
  • Automatic transaxle assembly (clutch, brake, gear, etc.)
 Comes on DTC stored SAE Code:
P08BB
DTC DETECTION CONDITION PATTERNS:

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnostic Condition Engine coolant temperature is 40°C (104°F) or higher. ◦ ◦ ◦
ATF temperature is -10°C (14°F) or higher. ◦ ◦ ◦
The vehicle is being driven with the shift lever in D. ◦ ◦ ◦
No malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SL, SLU and SLT) valves, transmission revolution sensors (NT and NC), coolant temperature sensor, oil temperature sensor, knock sensor, crankshaft position sensor circuits, electronic throttle or CAN communication system. ◦ ◦ ◦
Malfunction Condition When the ECM commands the transaxle to shift to 2nd gear, the engine overruns (neutral status). ◦ - -
When the ECM commands the transaxle to shift to 8th gear, the engine overruns (neutral status). - ◦ -
When the ECM commands the transaxle to shift to 1st gear, the engine overruns (neutral status). - - ◦
Duration - - -
Detection Logic 2-trip detection logic 2-trip detection logic 2-trip detection logic

HINT: 

This DTC is stored when any of the above detection patterns is met.

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