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Home >> Subaru >> 2007 >> Outback XT Limited, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0181 Fuel Temperature Sensor "A" Circuit Range/Performance >> Diagnostic Method
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Diagnostic Method

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

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Fuel level ≥ 9.6 (2.54 US gal, 2.11 lmp gal)
After engine starting 20 seconds or more
Engine coolant temperature - engine coolant temperature at engine starting ≥ 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.

Judge as OK if the criteria below are met.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Fuel level ≥ 9.6 (2.54 US gal, 2.11 lmp gal)
After engine starting 20 seconds or more
Engine coolant temperature - engine coolant temperature at engine starting ≥ 10°C (18°F)
Fuel temperature - Engine coolant temperature < 10°C (18°F)
Battery voltage > 10.9 V
Engine coolant temperature < 70°C (158°F)

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.



Judge as NG if the criteria below are met.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Accumulated amount of intake air ≥ 550 kg (1212.5 lb)
Fuel temperature difference between Max. and Min. < 2°C (3.6°F)

Time Needed for Diagnosis:  Undetermined

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

Judge as OK if the criteria below are met.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Accumulated amount of intake air ≥ 550 kg (1212.5 lb)
Fuel temperature difference between Max. and Min. ≥ 2°C (3.6°F)