Coolant Temperature Sensor/Switch (For Computer): Service and Repair

2003 Volkswagen Passat Sedan (3B3) V6-2.8L (ATQ)SECTION Service and Repair



Resistance values







The diagram applies to the Engine Coolant Temperature (ECT) sensor -G62- and for the Intake Air Temperature (IAT) sensor -G42-.

The diagram is divided into two temperature ranges:

A - from 0-50 °C
B - from 50-105 °C

Examples of how to read the diagram:
- 30 °C is in range A and corresponds to a resistance of 1.5-2.0 k Ohms
- 80 °C is in range B and corresponds to a resistance of 275-375 Ohms
RENDER: 1.0x

NO RELATED

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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.