I have just checked to connector to the sensor. Three wires, red, black(white stripes) and white (black stripes). They are all open ciruit (non was connected to ground and infinite resistance). I expect the black to be ground and red at +5V but they are not connected even with the ignition ON. Can anyone tell me where the other end of the cable is connected to? In the mean while I will check the other sensors on the throttle body as suggested. Thanks in advance.