DTC P0140 - Rear Oxygen Sensor Activity Not Detected: Notes

WARNING: This page is about a different car, the 1997 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For connector identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article. Always perform applicable drive cycle test after repair is performed to verify DTC does not reset.