DTC P0843; Oil Pressure Switch No. 1 (Oil Pressure Switch B) Stuck Off: Notes
WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSE
| DTC P0843:00 |
Oil pressure switch No. 1 (Oil pressure switch B) stuck off |
| DETECTION CONDITION |
- Under the following conditions, oil pressure switch No. 1 stuck-off detected by combination of gear ratio malfunction and oil pressure switch pattern malfunction:
- Engine is running.
- ATF temperature is 20 °C {68 °F} or more.
- There is no difference between vehicle speed signal from DSC HU/CM and output shaft speed sensor signal.
- Turbine/input shaft speed sensor and output shaft speed sensor DTC is not recorded.
|
| FAIL-SAFE FUNCTION |
- Inhibits malfunctioning gear.
- Limits engine torque.
- Inhibits learning control.
- Inhibits manual mode.
- Inhibits neutral idle control.
- Inhibits AAS.
|
| POSSIBLE CAUSE |
- Oil pressure switch No. 1 malfunction
- TCM malfunction
|
| SYSTEM WIRING DIAGRAM |
Not applicable |