[RWebb]

Be sure he is right. Run a separate wire from sensor to gauge input & see what happens. It can just be a long wire that runs outside the car.

If it works then, you will want to check the sensor wire itself.

If it does not work with an extra wire, then it has to be the sensor or the grounds.

Also, stick a multimeter on the sensor and to ground on the car. Check the resistance reading when the engine is hot & when it is cold. If they both give some resistance then the sensor is likely good.