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.
2001 Mercedes Benz ML430FACTORY OEM SERVICE PROCEDURE
Engine Coolant Temperature Sensor
ENGINE COOLANT TEMPERATURE SENSOR VOLTAGE SPECIFICATIONS (4.3L, 5.0L & 5.5L)
| Engine Coolant Temperature °F (°C) | (1) Volts | ||
|---|---|---|---|
| 68 (20) | 3.4 | ||
| 86 (30) | 2.9 | ||
| 104 (40) | 2.4 | ||
| 122 (50) | 1.9 | ||
| 140 (60) | 1.5 | ||
| 158 (70) | 1.2 | ||
| 176 (80) | 0.9 | ||
| 194 (90) | 0.7 | ||
| 212 (100) | 0.5 | ||
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ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE SPECIFICATIONS (4.3L, 5.0L & 5.5L)
| Engine Coolant Temperature °F (°C) | (1) Ohms | ||
|---|---|---|---|
| 68 (20) | 3090 | ||
| 86 (30) | 2000 | ||
| 104 (40) | 1330 | ||
| 122 (50) | 900 | ||
| 140 (60) | 630 | ||
| 158 (70) | 440 | ||
| 176 (80) | 320 | ||
| 194 (90) | 230 | ||
| 212 (100) | 170 | ||
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Factory Service Tools
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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.