DTC P007B-00: Boost Air Temperature Sensor Circuit Range/Performance Problem: Notes

DTC P007B:00 DETECTION CONDITION AND POSSIBLE CAUSE

DTC P007B:00	Boost air temperature sensor circuit range/performance problem
DETECTION CONDITION	The condition has continued for 2 s in which difference in intake air temperature measured by the boost air temperature sensor and IAT sensor No. 1 or No. 2 is 17°C {31°F} or more or -26°C {-47°F} or less MONITORING CONDITIONS Period vehicle being left: 6 h or more Battery voltage: 8 V or more Within 20 s after engine start The following DTCs are not detected: Boost air temperature sensor: P007C:00, P007D:00 IAT sensor No. 1: P0112:00, P0113:00 IAT sensor No. 2: P0097:00, P0098:00 Diagnostic support note This is a continuous monitor (CCM). The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA/Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	Boost pressure sensor/boost air temperature sensor connector or terminals malfunction Boost air temperature sensor malfunction Short to ground in wiring harness between boost pressure sensor/boost air temperature sensor terminal B and PCM terminal 2U PCM connector or terminals malfunction Boost air temperature sensor signal circuit and ground circuit are shorted to each other PCM malfunction
Courtesy of MAZDA MOTORS CORP.