Possible Causes
WARNING: This page is about a different car, the 2003 Mazda MPV and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
- ECT sensor malfunction.
- Faulty connection at ECT sensor or PCM harness connector.
- Open circuit between ECT sensor and PCM harness connectors.
- PCM malfunction.
- Short to power between ECT sensor and PCM harness connectors.