DTC P0134:00: Notes

DTC P0134:00	A/F sensor circuit no activity detected
DETECTION CONDITION	The PCM monitors the element impedance A/F sensor when the following conditions are met. Under the following monitoring conditions, the element impedance more than specified value, the PCM determines that the A/F sensor is not activated. MONITORING CONDITIONS EGR System, A/F sensor heater, HO2S heater, A/F sensor, HO2S and TWC Repair Verification Drive Mode Following conditions are met: A/F sensor heater is turned on for more than 35 s Battery voltage: 11-18 V 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 loose Leakage exhaust system A/F sensor connector or terminal malfunction A/F sensor heater malfunction A/F sensor heater deterioration Short to ground in wiring harness between A/F sensor terminal E and PCM terminal 2A Short to ground in wiring harness between A/F sensor terminal B and PCM terminal 2AD Short to ground in wiring harness between A/F sensor terminal D and PCM terminal 2AC Short to ground in wiring harness between A/F sensor terminal F and PCM terminal 2Z PCM connector or terminal malfunction Open circuit in wiring harness between A/F sensor terminal E and PCM terminal 2A Open circuit in wiring harness between A/F sensor terminal B and PCM terminal 2AD Open circuit in wiring harness between A/F sensor terminal D and PCM terminal 2AC Open circuit in wiring harness between A/F sensor terminal F and PCM terminal 2Z Engine malfunction Insufficient engine compression Engine coolant leakage PCM malfunction