DTC P0840-24: Transmission Fluid Pressure Sensor/Switch "A" Signal Stuck High [09/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.

CLEAR DTC

Clear the DTCs.

Powertrain > Transmission > Clear DTCs

Result

Proceed to
NEXT

Result:

See step 2

CHECK DTC OUTPUT (DTC P0840-24)

Read the DTCs.

Powertrain > Transmission > Trouble Codes

Result

Result	Proceed to
Only P0840-24 is output	A
DTCs other than P0840-24 are also output	B
DTCs are not output	C

Result:

REPLACE TRANSAXLE ASSEMBLY WITH MOTOR. Refer to REMOVAL [09/2023 - ]

Result:

GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2023 - ]

Result:

CHECK FOR INTERMITTENT PROBLEMS

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2023 - ]

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [09/2023 - ]