DTC P0134:00: Notes

DTC P0134:00 (MZR 1.5) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0134:00	A/F sensor circuit no activity detected
DETECTION CONDITION	The PCM monitors the A/F sensor element impedance when the following conditions are met. If the A/F sensor element impedance is 40 ohms or more , the PCM determines that the A/F sensor is not activated. MONITORING CONDITIONS Drive Mode 03 (EGR System, A/F Sensor Heater, HO2S Heater, A/F Sensor, HO2S and TWC Repair Verification Drive Mode) The following conditions are met: Time from engine start: above 56 s (ECT when engine start is 20 °C {68 °F}) Diagnostic support note This is an intermittent monitor (A/F sensor, HO2S). The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. PENDING CODE is available 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	A/F sensor looseness Exhaust system leakage A/F sensor connector or terminals malfunction A/F sensor heater malfunction PCM connector or terminals malfunction Short to power supply in wiring harness between A/F sensor terminal A and PCM terminal 2Z Open circuit in wiring harness between A/F sensor terminal A and PCM terminal 2Z Engine internal malfunction Engine coolant leakage to combustion chamber Insufficient engine compression A/F sensor malfunction A/F sensor deterioration PCM malfunction