DTC P0340:00 [L5]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSES

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 not 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 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 is available. The DTC is stored in the PCM memory
POSSIBLE CAUSE	CMP sensor connector or terminal malfunction PCM connector or terminal malfunction Short to ground in wiring harness between CMP sensor terminal C and PCM terminal 2AM Short to ground in wiring harness between CMP sensor terminal B and PCM terminal 2S Short circuit in CMP sensor circuits 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 CMP sensor terminal C and PCM terminal 2AM Open circuit in wiring harness between CMP sensor terminal B and PCM terminal 2S Open circuit in wiring harness between CMP sensor terminal A and body ground CKP sensor connector or terminal 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 CMP sensor malfunction CMP sensor is dirty CMP sensor pulse wheel malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.

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 not 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 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 is available.
The DTC is stored in the PCM memory

POSSIBLE CAUSE

CMP sensor connector or terminal malfunction
PCM connector or terminal malfunction
Short to ground in wiring harness between CMP sensor terminal C and PCM terminal 2AM
Short to ground in wiring harness between CMP sensor terminal B and PCM terminal 2S
Short circuit in CMP sensor circuits 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 CMP sensor terminal C and PCM terminal 2AM
Open circuit in wiring harness between CMP sensor terminal B and PCM terminal 2S
Open circuit in wiring harness between CMP sensor terminal A and body ground
CKP sensor connector or terminal 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
CMP sensor malfunction
- CMP sensor is dirty
- CMP sensor pulse wheel malfunction
PCM malfunction

Courtesy of MAZDA MOTORS CORP.