DTC P2BF7-00: Exhaust Shutter Valve Position Sensor Circuit High Input: Notes

DTC P2BF7-00: (PCM, VIN M) DETECTION CONDITION AND POSSIBLE CAUSE

DTC P2BF7-00:	Exhaust shutter valve position sensor circuit high input
DETECTION CONDITION	If the input voltage at the PCM terminal 1AL is more than 4.94 V for 5 s, the PCM determines that the exhaust shutter valve position sensor circuit has a malfunction. MONITORING CONDITIONS Battery voltage: 8 V or more Diagnostic support note This is a continuous monitor (other). The master warning light illuminates if the PCM detects the above malfunction condition during the first drive cycle. The check engine light does not illuminate. FREEZE FRAME DATA/Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	PCM restricts engine torque.
POSSIBLE CAUSE	Exhaust shutter valve/exhaust shutter valve position sensor connector or terminals malfunction PCM connector or terminals malfunction Short to power supply in wiring harness between exhaust shutter valve terminal C and PCM terminal 1D Exhaust shutter valve position sensor power supply circuit and signal circuit are shorted to each other Open circuit in wiring harness between exhaust shutter valve terminal D and PCM terminal 1BG Exhaust shutter valve position sensor (built-into exhaust shutter valve) malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.