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Home >> Subaru >> 2006 >> Outback R >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0181 Fuel Temperature Sensor "A" Circuit Range/Performance >> Diagnostic Method

Diagnostic Method

Abnormality Judgment 

Judge as NG when the continuous time of completing the malfunction criteria below becomes 120 seconds or more.

Judgment Value 

JUDGMENT VALUE CHART

Malfunction Criteria Threshold Value
Fuel level ≥ 9.0 (2.38 US gal, 1.98 Imp gal)
After engine starting 20 seconds or more
Engine coolant temperature - engine coolant temperature at engine start > 10°C (18°F)
Fuel temperature - Engine coolant temperature ≥ 10°C (18°F)
Battery voltage > 10.9 V

Time Needed for Diagnosis:  120 seconds

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.

Normality Judgment 

Judge as OK when the criteria below are met.

Judgment Value 

JUDGMENT VALUE CHART

Malfunction Criteria Threshold Value
Fuel level ≥ 9.0 (2.38 US gal, 1.98 Imp gal)
After engine starting 20 seconds or more
Engine coolant temperature - engine coolant temperature at engine start > 10°C (18°F)
Fuel temperature - Engine coolant temperature < 10°C (18°F)
Engine coolant temperature < 75°C (167°F)
Battery voltage > 10.9 V

Stuck Diagnosis 

As the engine warms up (cumulative amount of intake air after starting is large), if the fuel temperature which should rise does not, determine as being stuck and NG.



Abnormality Judgment 

Judge as NG when the malfunction criteria below are met.

Judgment Value 

JUDGMENT VALUE CHART

Malfunction Criteria Threshold Value
Accumulated amount of intake air ≥ 551 kg (1215 lb)
Fuel temperature difference between Max. and Min. < 2°C (3.6°F)

Time Needed for Diagnosis:  Undecided

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.

Normality Judgment 

Judge as OK when the criteria below are met.

Judgment Value 

JUDGMENT VALUE CHART

Malfunction Criteria Threshold Value
Accumulated amount of intake air ≥ 551 kg (1215 1b)
Fuel temperature difference between Max. and Min. ≥ 2°C (3.6°F)