Possible Causes

WARNING: This page is about a different car, the 2002 Mazda Millenia and 2001 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.

Following items are possible causes for DTC P0705

TR switch malfunction.
Short to ground or power in circuit(s) between TR switch and PCM, or TR switch and instrument cluster.
Damaged connectors or wiring harness between TR switch and PCM.
PCM malfunction.