DTC P0134:00 [L5]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSES

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 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. 10-18 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 is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	A/F sensor connector or terminal malfunction PCM connector or terminal malfunction 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 A/F sensor heater malfunction A/F sensor heater deterioration 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 Leakage exhaust system Engine malfunction Engine coolant leakage Insufficient compression PCM malfunction
Courtesy of MAZDA MOTORS CORP.

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
- 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. 10-18 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 is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

A/F sensor connector or terminal malfunction
PCM connector or terminal malfunction
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
A/F sensor heater malfunction
- A/F sensor heater deterioration
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
Leakage exhaust system
Engine malfunction
- Engine coolant leakage
- Insufficient compression
PCM malfunction

Courtesy of MAZDA MOTORS CORP.