Code 15: Heated Oxygen Sensor - Inactivation

WARNING: This page is about a different car, the 1995 Mazda MX-3. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Trouble Code No. 15 Heated Oxygen Sensor - Inactivation

Fig 2: Trouble Code No. 15 Engine Coolant Temperature Sensor, Throttle Position Sensor, Mass Air Flow Sensor & Heated Oxygen Sensor Circuit Diagram