DTC P0102-00: MAF Sensor Circuit Low Input: Notes

DTC P0102:00	MAF sensor circuit low input
DETECTION CONDITION	The PCM monitors input voltage from the MAF sensor when the engine is running. If the input voltage at the PCM terminal 2BC is below 0.2 V for 5 s , the PCM determines that the MAF sensor circuit has a malfunction. 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 (Mode 2)/Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Restricts the upper limit of the engine speed. Inhibits the evaporative purge control.
POSSIBLE CAUSE	MAF sensor/IAT sensor No. 1 connector or terminals malfunction Short to ground or open circuit in MAF sensor power supply circuit Short to ground in wiring harness between ENGINE1 15 A fuse and MAF sensor/IAT sensor No. 1 terminal E ENGINE1 15 A fuse malfunction Open circuit in wiring harness between main relay terminal C and MAF sensor/IAT sensor No. 1 terminal E Short to ground in wiring harness between the following terminals: MAF sensor/IAT sensor No. 1 terminal D-PCM terminal 2BB MAF sensor/IAT sensor No. 1 terminal C-PCM terminal 2BC PCM connector or terminals malfunction MAF sensor signal circuit and ground circuit are shorted to each other Open circuit in wiring harness between the following terminals: MAF sensor/IAT sensor No. 1 terminal D-PCM terminal 2BB MAF sensor/IAT sensor No. 1 terminal C-PCM terminal 2BC MAF sensor malfunction PCM malfunction

CAUTION:

Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.