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.
Engine Oil Level Sensor
The function of the sensor is to provide the Engine Control Module (ECM) with information regarding the level of engine oil in the oil sump.
The engine oil level sensor is of the passive level sensor type, which measures the oil level both statically (ignition on) and dynamically (when driving).
The sensor is supplied with 12 V from the Engine Control Module (ECM) and generates a pulse width modulated (PWM) signal to the Engine Control Module (ECM).
The lower the oil level the longer the pulse width of signal.
HINT: On vehicles with structure week 201420- the sensor is of the longer type compared with previous versions. This is to improve the level signal's reliability in all relevant level areas.
The sensor is diagnosed by the Engine Control Module (ECM). The signal from the sensor can be read out.
Use the Manual With the Right Hardware
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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.
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