DTC P0520-24: Engine Oil Pressure Sensor/Switch "A" Signal Stuck High; DTC P0520-2A: Engine Oil Pressure Sensor/Switch "A" Signal Stuck in Range [10/2022 - ]: Procedure

1. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   P0520-24 or P0520-2A and other DTCs are output	A
   P0520-24 or P0520-2A is output	B

   HINT: 

   If any DTCs other than P0520-24 or P0520-2A are output, troubleshoot those DTCs first.

Result: 

A 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 08/2023]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - 10/2024]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ] 

Result: 

B 

See step  2

Pre-procedure1

• Read the value displayed on the GTS.
  1. Disconnect the oil pressure control valve assembly connector.
  2. Start the engine.
  3. With the engine oil temperature at 75 to 85°C (167 to 185°F), read the "Engine Oil Pressure" with the engine speed at 2000 rpm.

     Powertrain > Engine > Data List 

     Tester Display
     Engine Speed
     Engine Oil Temperature Sensor
     Engine Oil Pressure

• Read the oil pressure using an oil pressure gauge with adapter.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  1. Install the oil pressure gauge with adapter.
     WARNING:

     Removing the oil pressure sender gauge assembly while the engine is hot could result in burns caused by contact with hot engine oil.

     NOTE:

     Clean the hose and adapter of the oil pressure gauge before and after measurement.

  2. Start the engine.
  3. With the engine oil temperature at 75 to 85°C (167 to 185°F), read the oil pressure gauge with the engine speed at 2000 rpm.

• Compare the Data List value and the oil pressure gauge reading.

  OK

  Data List value and gauge reading are within +/-50 kPa (7.3 psi) of each other

  HINT: 

  Be sure to clear the DTCs after reinstalling the oil pressure sensor (oil pressure sender gauge assembly) or reconnecting the oil pressure sensor (oil pressure sender gauge assembly) or oil pressure control valve assembly connector, as DTCs may be stored.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPLACE OIL PRESSURE SENSOR (OIL PRESSURE SENDER GAUGE ASSEMBLY). Refer to  REMOVAL [10/2022 - ]