P0794 Intermediate Shaft Speed Sensor Circuit Intermittent

P0794 indicates an intermittent intermediate shaft speed sensor circuit fault. The speed signal drops out or becomes implausible only at times.

Code details

Generic OBD-II · P0

System: Transmission
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not clear intermittent speed-sensor faults without a heat, vibration, and connector check; they often return under load.

Symptoms of P0794

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 P0794

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

Monitor intermediate speed while repeating freeze-frame speed, load, temperature, and shift conditions.
Inspect internal harness movement, case connector terminals, sensor connector fit, fluid intrusion, and reluctor condition.
Check whether ratio or shift codes appear at the same time as the speed-signal dropout.

Related OBD-II codes

These nearby transmission entries can help compare wording and pin down the fault area.