Symptoms of P0952
- Harsh, delayed, or slipping shifts, or being stuck in one gear.
- Check-engine light, sometimes with limp-home mode.
- Flaring RPM or a shudder under load.
Common causes of P0952
- Low or degraded transmission fluid.
- A failing speed sensor, shift solenoid, or pressure-control circuit.
- Wiring, connector, or internal hydraulic/mechanical faults.
Useful checks before replacing parts
- Measure manual control signal voltage, reference feed, ground, and continuity while operating upshift, downshift, and mode controls.
- Inspect switch contacts, connector terminals, short-to-ground faults, clock spring or shifter harness paths, and spilled-liquid damage.
- Compare low circuit status with manual mode entry, gear display, and related switch or range sensor data.
Related OBD-II codes
These nearby transmission entries can help compare wording and pin down the fault area.