Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMITSUBISHI2005LANCER EVOLUTION L4-2.0L DOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSFUEL LEVEL SENSORTECHNICAL SERVICE BULLETINSFUEL SYSTEM - DTC P0181 UPDATE
2005 Mitsubishi Lancer Evolution L4-2.0L DOHC Turbo
Fuel System - DTC P0181 Update
2005 Mitsubishi Lancer Evolution L4-2.0L DOHC TurboSECTION Fuel System - DTC P0181 Update
SOURCE: Mitsubishi Tech Talk Article April/May 2005
TITLE: DTC P0181 Update
APPLIES TO: 2003-05 Outlander, 2002-05 Lancer
SERVICE TIP:
DTC P0181 may set be due to incorrect resistance in the fuel level sending unit thermistor circuit. If possible, park the vehicle in the shop overnight so the temperature of the fuel in the tank is the same as the ambient temperature in the shop.
Lancer: Disconnect 3-pin connector D-10 under the rear seat and check for 5.0 V on the P wire at pin 3 and ground on the B wire at pin 2. Repair harness if voltage is not 5V. Reconnect the connector and measure voltage on the P wire. Replace the sending unit (p/n MR557168) if outside of these specs:
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
Outlander: Access the fuel temp sensor in the data list using the MUT-III. It should be within 5-10 degrees F of an accurate thermometer placed in the car. If the data list temp is incorrect, inspect the harness at connector D-14 under the rear seat for 5.0 V on the GR-G wire and a ground at the B wire on pin 2. Repair the harness if voltage is not 5V. If voltage is 5V at the harness, replace the sending unit (p/n MR978016 2WD; MR978024 AWD).
TITLE: DTC P0181 Update
APPLIES TO: 2003-05 Outlander, 2002-05 Lancer
SERVICE TIP:
DTC P0181 may set be due to incorrect resistance in the fuel level sending unit thermistor circuit. If possible, park the vehicle in the shop overnight so the temperature of the fuel in the tank is the same as the ambient temperature in the shop.
Lancer: Disconnect 3-pin connector D-10 under the rear seat and check for 5.0 V on the P wire at pin 3 and ground on the B wire at pin 2. Repair harness if voltage is not 5V. Reconnect the connector and measure voltage on the P wire. Replace the sending unit (p/n MR557168) if outside of these specs:
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
Outlander: Access the fuel temp sensor in the data list using the MUT-III. It should be within 5-10 degrees F of an accurate thermometer placed in the car. If the data list temp is incorrect, inspect the harness at connector D-14 under the rear seat for 5.0 V on the GR-G wire and a ground at the B wire on pin 2. Repair the harness if voltage is not 5V. If voltage is 5V at the harness, replace the sending unit (p/n MR978016 2WD; MR978024 AWD).
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.