Possible Causes

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Possible causes are:

Connector or terminal malfunction
Open circuit between right side CMP sensor harness connector terminal "A" (White/Black wire) and PCM 104-pin harness connector terminal No. 85 (Black wire)
Open circuit between right side CMP sensor harness connector terminal "B" (Brown/Yellow wire) and PCM 104-pin harness connector terminal No. 86 (White wire)
PCM malfunction
Right side CMP sensor is dirty
Right side CMP sensor malfunction
Short to ground circuit between right side CMP sensor 2-pin harness connector terminal "A" (White/Black wire) and PCM 104-pin harness connector terminal No. 85 (Black wire)
Short to ground circuit between right side CMP sensor harness connector terminal "B" (Brown/Yellow wire) and PCM 104-pin harness connector terminal No. 86 (White wire)
Short each harness right side CMP sensor harness connector terminal "A" (White/Black wire) and terminal "B" (Brown/Yellow wire)