P0181 Fuel Temperature Sensor Circuit Range/Performance
Check Conditions
The engine coolant temperature − intake air temperature is 5°C (9°F) or less when the engine is started. The engine coolant temperature is between −10°C(14°F) and 36°C (96.8°F) when the engine is started. Engine coolant temperature is higher than 60°C (140°F). Maximum vehicle speed is higher than 30 km/h (17 mph) after the starting sequence has been completed.
Judgement Criteria
The fuel tank temperature − engine coolant temperature is 15°C (27°F) or more when the engine is started.
- Fuel tank temperature sensor failed.
- Open or shorted fuel tank temperature sensor circuit, or loose connector.
- PCM failed.
NOTE: A diagnostic trouble code (DTC) could be output if the engine coolant is changed as indicated below. Because this is not a failure, the DTC must be erased.
Make sure to test drive the vehicle in accordance with the drive cycle pattern in order to verify that a DTC will not be output.
The engine and the radiator have been flushed repeatedly when the engine coolant temperature was high (or the fuel tank temperature was high).
Check Conditions
The engine coolant temperature − intake air temperature is 5°C (9°F) or less when the engine is started. The engine coolant temperature is between −10°C(14°F) and 36°C (96.8°F) when the engine is started. Engine coolant temperature is higher than 60°C (140°F). Maximum vehicle speed is higher than 30 km/h (17 mph) after the starting sequence has been completed.
Judgement Criteria
The fuel tank temperature − engine coolant temperature is 15°C (27°F) or more when the engine is started.
- Fuel tank temperature sensor failed.
- Open or shorted fuel tank temperature sensor circuit, or loose connector.
- PCM failed.
NOTE: A diagnostic trouble code (DTC) could be output if the engine coolant is changed as indicated below. Because this is not a failure, the DTC must be erased.
Make sure to test drive the vehicle in accordance with the drive cycle pattern in order to verify that a DTC will not be output.
The engine and the radiator have been flushed repeatedly when the engine coolant temperature was high (or the fuel tank temperature was high).