The P0794 trouble code indicates an intermittent issue with the Intermediate Shaft Speed Sensor “A” circuit. Here’s what you should know:
Intermediate Shaft Speed Sensor “A” Circuit Intermittent
Code symptoms P0794.
1. Check Engine Light (CEL) illuminated on the dashboard.
2. Fluctuations in vehicle speed readings.
3. Problems with shifting gears.
4. Transmission may not respond properly to driver inputs.
5. Reduced fuel efficiency.
Causes of the code P0794.
1. Faulty Intermediate Shaft Speed Sensor.
2. Wiring issues, such as damaged wires or poor connections in the circuit.
3. Intermittent sensor failure.
4. Loose or corroded connectors.
5. Faulty transmission control module (TCM).
Code Solutions P0794.
1. Begin by using a scan tool to retrieve freeze frame data and any other stored trouble codes. This information can provide insight into when and how the malfunction occurred.
2. Inspect the wiring and connectors associated with the Intermediate Shaft Speed Sensor circuit for any signs of damage, corrosion, or loose connections. Repair or replace any damaged wiring or connectors as needed.
3. Test the Intermediate Shaft Speed Sensor itself using a multimeter or other appropriate diagnostic tools to ensure it is functioning properly. Replace the sensor if necessary.
4. Perform a wiggle test on the wiring harness while monitoring sensor data to simulate conditions that may cause intermittent faults. If the issue occurs during the test, focus on the area where the fault was induced.
5. Check the connectors and terminals for the sensor and TCM for proper fit and corrosion. Clean and secure any loose connections.
6. If the problem persists, further diagnostics on the TCM and related systems may be necessary.
7. Clear the trouble codes from the vehicle’s computer memory and test drive the vehicle to see if the code returns. If it does, further diagnosis or repairs may be required.