DTC P0134: Notes
DTC P0134 [L3] DETECTION CONDITIONS AND POSSIBLE CAUSES
| DTC P0134 |
A/F sensor 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
- 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 the first drive cycle.
- FREEZE FRAME DATA (Mode 2/Mode 12) is available.
- DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- A/F sensor looseness
- Leakage exhaust system
- Open or short circuit in wiring harness between A/F sensor terminal D and PCM terminal 2AC
- Open or short circuit in wiring harness between A/F sensor terminal B and PCM terminal 2AD
- Open or short circuit in wiring harness between A/F sensor terminal F and PCM terminal 2Z
- Open or short circuit in wiring harness between A/F sensor terminal E and PCM terminal 2A
- A/F sensor malfunction
- Engine malfunction (Leakage engine coolant)
- Insufficient compression
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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