P0794Intermediate Shaft Speed Sensor A Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The intermediate shaft speed sensor measures a shaft between input and output – a countershaft on Toyota's U760 six-speed, the intermediate shaft behind the overdrive set on Ford's 5R110W. Together with turbine and output speed it lets the module check each gear stage and control clutch slip. P0794 means the intermediate shaft signal drops out or jumps briefly – not long enough for P0793 – typically a loose contact or a wire breaking under movement. No manufacturer document available to us uses this code; the expected logic counts unrealistic jumps like Ford's P0718 for the turbine sensor (200 spikes within 1.5 s each). Occasional harsh shifts follow, and limp mode after several events.
- What you may notice
- Occasional transmission warning
- Harsh shift now and then
- Limp mode, gone after restart
- Likely causes
- LikelyLoose contact at the connector or broken wire
- PossibleSensor thermally unstable
- RareInterference (ground, shielding)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.