DTC P0340-00: Intake CMP Sensor Circuit Problem: Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0340:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Intake CMP sensor circuit problem
Detection condition	The intake CMP sensor input signal pattern, received while the crankshaft rotates 24 times, is incorrect.
Fail-safe	Sets the electric variable valve timing control to the maximum cam retard mode. Inhibits traction control.
Possible cause	Intake CMP sensor connector or terminals malfunction F8 15 A fuse malfunction Short to ground in intake CMP sensor power supply circuit Open circuit in intake CMP sensor power supply circuit Short to ground in intake CMP sensor signal circuit PCM connector or terminals malfunction Short to power supply in intake CMP sensor signal circuit Short circuit in intake CMP sensor signal circuit and ground circuit Open circuit in any of the following intake CMP sensor circuits. Signal circuit Ground circuit Intake CMP sensor malfunction Intake CMP sensor is dirty Intake CMP sensor pulse wheel malfunction Damage to the detection area of the intake CMP sensor CKP sensor connector or terminals malfunction Loose timing chain or improper valve timing PCM malfunction
Courtesy of MAZDA MOTORS CORP.