DTC P0340:00: Notes

DTC P0340:00 (LF, L5) DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0340:00	CMP sensor circuit problem
DETECTION CONDITION	The PCM monitors the input voltage from the CMP sensor when the engine is running. If the PCM does receive the input voltage from the CMP sensor while the PCM receives the input signal from the CKP sensor, the PCM determines that the CMP sensor circuit has a malfunction. Diagnostic support note This is a continuous monitor (CCM). The MIL illuminates if the PCM detects the above malfunction condition during first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	CMP sensor malfunction CMP sensor is dirty CMP sensor pulse wheel malfunction CMP sensor connector or terminals malfunction Open circuit in wiring harness between CMP sensor terminal A and body ground Short to ground in wiring harness between the following terminals: CMP sensor terminal C-PCM terminal 2AM CMP sensor terminal B-PCM terminal 2S PCM connector or terminals malfunction CMP sensor circuits are shorted to each other Short to the power supply in wiring harness between CMP sensor terminal B and PCM terminal 2S Open circuit in wiring harness between the following terminals: CMP sensor terminal C-PCM terminal 2AM CMP sensor terminal B-PCM terminal 2S CKP sensor connector or terminals malfunction Variable valve timing mechanism misinstallation Loose timing chain or improper valve timing Loose camshaft sprocket lock bolt Loose crankshaft pulley lock bolt Stopper pin mechanism malfunction Variable valve timing mechanism is stuck in advanced position PCM malfunction
Courtesy of MAZDA MOTORS CORP.