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Richard, ASE Certified Technician
Category: Car
Satisfied Customers: 15555
Experience:  12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
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Check engine light-po181 fuel temperature circuit sensor a out

Customer Question

check engine light-po181 fuel temperature circuit sensor a out of range what does that mean--is it something to repair?
Submitted: 8 years ago.
Category: Car
Expert:  Richard replied 8 years ago.

Hello and welcome to


What is the year, make, model and engine size of your vehicle?

Customer: replied 8 years ago.

2003 Mitsubishi outlander 2.4
Customer: replied 8 years ago.

2003 mitsubishi outlander 2.4

60182 miles

Expert:  Richard replied 8 years ago.

DTC P0181 may set be due to incorrect resistance in the fuel level sending unit thermistor circuit. If your scan tool that you used can read pids or live data park the vehicle in a garage if possible overnight so the temperature of the fuel in the tank is the same as the ambient temperature inside. These are the readings you should get.

0 C (32 F) = 2.7 - 3.1 V
20 C (68 F) = 2.1 - 2.5 V
40 C (104F) = 1.6 - 2.0V


If the data list temp is incorrect, inspect the harness at connector D-14 under the rear seat for 5.0 V on the grey/green wire and a ground at the black wire on pin 2. Repair the harness if voltage is not 5V. If voltage is 5V at the harness, replace the sending unit.