OBD-II code · Powertrain (generic)
P0794 Intermediate Shaft Speed Sensor A Circuit Intermittent
Intermediate shaft speed sensor A signal jumps or drops out — vibration, loose connector or oil mist on the sensor tip.
Is it safe to drive with P0794?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyLoose connector
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.6–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Intermediate Shaft Speed Sensor A, Sensor Wiring
Related codes
- P0792Intermediate Shaft Speed Sensor A Circuit Range/Performance
- P2748Intermediate Shaft Speed Sensor B Circuit Intermittent
- P2752Intermediate Shaft Speed Sensor C Circuit Intermittent
- P0791Intermediate Shaft Speed Sensor A Circuit
- P0793Intermediate Shaft Speed Sensor A Circuit No Signal
- P0795Pressure Control Solenoid C
- P0796Pressure Control Solenoid C Performance
- P0797Pressure Control Solenoid C Stuck On
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.