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Home >> Subaru >> 2018 >> WRX Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 4) (Except For STI) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0196: Engine Oil Temperature Sensor "A" Range/Performance >> Diagnostic Method

Diagnostic Method

Judge as NG when Diagnosis 1 or Diagnosis 2 becomes NG.

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Diagnosis 1 

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
|Oil temperature 30 sec. after engine start - Engine coolant temperature at engine start| > 10°C (18°F)
|Oil temperature 30 sec. after engine start - Intake air temperature 30 sec. after engine start| > Value of Map 1
AMBIENT TEMPERATURE SPECIFICATION - MAP 1

Ambient temperature
(°C (°F))
-30
(-22)
30
(86)
45
(113)
60
(140)
|Engine oil temperature at engine start - Intake air temperature 30 sec. after engine start|
(°C (°F))
10
(18)
10
(18)
22
(39.6)
22
(39.6)

Time needed for diagnosis:  Less than 1 second

Diagnosis 2 

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Engine oil temperature < 50°C (122°F)
Elapsed time after starting the engine = Value of Map 2
TEMPERATURE SPECIFICATION - MAP 2

Intake air temperature at engine start
(°C (°F))
-30
(-22)
-20
(-4)
-10
(14)
0
(32)
10
(50)
20
(68)
30
(86)
40
(104)
Elapsed time after starting the engine
(s)
3, 000 2, 100 1, 400 900 700 500 400 370

Time needed for diagnosis:  Less than 1 second

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.