Subaru Crosstrek Service Manual: Dtc p0196 engine oil temperature sensor "a" range/performance
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC P0196 ENGINE OIL TEMPERATURE SENSOR "A" RANGE/PERFORMANCE
DTC DETECTING CONDITION:
Detected when two consecutive driving cycles with fault occur.
TROUBLE SYMPTOM:
• Hard to start
• Improper idling
• Poor driving performance
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">
, and Inspection Mode Inspection Mode > PROCEDURE">.
| STEP | CHECK | YES | NO |
1.CHECK FOR ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
Check the appropriate DTC using the “List of Diagnostic Trouble Code (DTC)”. List of Diagnostic Trouble Code (DTC)">
Replace the engine oil temperature sensor. Engine Oil Temperature Sensor">
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of the engine oil temperature sensor output properties. Using the following two diagnoses, judge as NG when either is NG.
• Diagnosis 1 (correlation diagnosis): After the engine starts after the specified period of soaking time has elapsed, diagnose by correlation between engine oil temperature sensor value, engine coolant temperature sensor value and intake air temperature sensor value. Judge as NG when the differences are both above the specified value by comparing between engine oil temperature and engine coolant temperature, engine oil temperature and intake air temperature.
• Diagnosis 2 (function diagnosis): Judge as NG when engine oil temperature does not rise to the specified value regardless of an engine running condition that clears certain conditions.
2. COMPONENT DESCRIPTION
(A) | Resistance value (k?) | (B) | Temperature °C (°F) | ||
(1) | Connector | (2) | Thermistor element |
3. EXECUTION CONDITION
Secondary parameters | Execution condition |
Battery voltage | ≥ 10.9 V |
Soaking time | ≥ 21600 s |
Block heater judgment | Completed |
Block heater operation | Not in operation |
Secondary parameters | Execution condition |
Battery voltage | ≥ 10.9 V |
Engine oil temperature at engine starting | < 50 °C (122 °F) |
Engine speed | ≥ 500 rpm |
Percentage of idling | ≤ 0.5 ? 100 |
4. GENERAL DRIVING CYCLE
• Diagnosis 1: Perform the diagnosis only once after the engine starts after a certain period of soaking time.
• Diagnosis 2: Perform the diagnosis only once after starting the engine from cold condition.
5. 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
Malfunction Criteria | Threshold Value |
Absolute value | |
Engine oil temperature at engine start − Engine coolant temperature at engine start | > 10 °C (18°F) |
Absolute value | |
Engine oil temperature at engine start − Intake air temperature 30 sec. after engine start | > Value of 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
Malfunction Criteria | Threshold Value |
Engine oil temperature | < 50 °C (122 °F) |
Elapsed time after starting the engine | ≥ Value from Map 2 |
Intake air temperature at engine start °C (°F) | |||||||||
−40 (−40) | −30 (−22) | −20 (−4) | −10 (14) | 0 (32) | 10 (50) | 20 (68) | 30 (86) | ||
Percentage of time when engine is at stop against time elapsed since engine start | 0.0 | 3300000 | 2730000 | 2200000 | 1740000 | 1400000 | 1120000 | 800000 | 500000 |
0.3 | 3300000 | 2730000 | 2200000 | 1740000 | 1400000 | 1120000 | 800000 | 500000 | |
0.6 | 3300000 | 2730000 | 2200000 | 1740000 | 1400000 | 1120000 | 800000 | 500000 | |
1.0 | 3300000 | 2730000 | 2200000 | 1740000 | 1400000 | 1120000 | 800000 | 500000 | |
ms | |||||||||
Time needed for diagnosis: Less than 1 second
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
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