Check engine light and automatic transaxle warning light ON with one or more of these DTCs stored in the...
Mazda technical service bulletin 05-003-20-3725 for 2012-2018 Mazda MAZDA3, 2013-2019 Mazda CX-5 and 2014-2019 Mazda MAZDA6 and others.
- Bulletin number
- 05-003-20-3725
- Component
- Equipment adaptive/mobility
- Summary
- Some vehicles may experience the check engine light and automatic transaxle warning light ON with one or more of these DTCs stored in the TCM memory (P0842, P0847, P0872, P0877, P0780, P1738). This is caused by the oil pressure switch A and/or B at the control valve body temporarily or permanently getting stuck due to contamination entering the passage. To correct the problem, some mass production changes have been implemented to reduce contamination and improve the DTC diagnostic logic.
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