P0791: Intermediate Shaft Speed Sensor Circuit
MediumPowertrainTransmission
What does P0791 mean?
P0791 is a diagnostic trouble code indicating "Intermediate Shaft Speed Sensor Circuit". A sensor in the transmission is reporting abnormal data or has lost communication with the ECU. Sensors can fail due to age, contamination, heat exposure, or wiring issues.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Intermittent warning lights
- Erratic gauge readings
Estimated repair cost
Typical range in Australia (parts + labour)
$100 – $500 AUD
Common causes
- Faulty transmission component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
Get a diagnosis for YOUR car
Code P0791 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.