DTC P0030:00, P0050:00: Notes
WARNING: This page is about a different variant/trim than selected.
| DTC P0030:00 |
A/F sensor (RH) heater control circuit |
| DTC P0050:00 |
A/F sensor (LH) heater control circuit |
| DETECTION CONDITION |
- P0030:00 indicates that A/F sensor (RH) heater circuit has a malfunction
- P0050:00 indicates that A/F sensor (LH) heater circuit has a malfunction
- The PCM monitors the heater in the air fuel ratio (A/F) sensor (RH/LH) for correct operation. The PCM controls the heater on/off duty cycle to maintain a temperature of 780 °C (1, 436 °F). The test fails when the sensor does not warm up to the required temperature in the calibrated amount of time. The test also fails when the PCM is not able to maintain the required temperature after the sensor is warm.
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| POSSIBLE CAUSE |
- P0030:00: Short to power supply in wiring harness between PCM terminal 2J and A/F sensor (RH) terminal E
- P0050:00: Short to power supply in wiring harness between PCM terminal 2E and A/F sensor (LH) terminal E
- P0030:00: Open circuit in wiring harness between PCM terminal 2AC and A/F sensor (RH) terminal H
- P0050:00: Open circuit in wiring harness between PCM terminal 2AE and A/F sensor (LH) terminal H
- P0030:00: Open circuit in wiring harness between PCM terminal 2AG and A/F sensor (RH) terminal F
- P0050:00: Open circuit in wiring harness between PCM terminal 2AK and A/F sensor (LH) terminal F
- P0030:00: Open circuit in wiring harness between PCM terminal 2J and A/F sensor (RH) terminal E
- P0050:00: Open circuit in wiring harness between PCM terminal 2E and A/F sensor (LH) terminal E
- A/F sensor loose connection, and damaged or corroded terminals
- Exhaust temperature significantly higher than expected
- Damaged A/F sensor (RH/LH)
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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