BMW DTC P0794 – Intermediate Shaft Speed Sensor ‘A’ Circuit Intermittent
DTC P0794 meaning on BMW
DTC P0794 on a BMW indicates an issue with the Intermediate Shaft Speed Sensor ‘A’ circuit. This fault code is triggered when the powertrain control module (PCM) detects an intermittent signal from the sensor, which monitors the speed of the intermediate shaft in the transmission.
BMW DTC P0794 symptoms
Symptoms of DTC P0794 on a BMW may include erratic shifting behavior, transmission slipping, harsh shifting, or the transmission going into limp mode. The Check Engine Light may also illuminate on the dashboard.
BMW DTC P0794 causes
The potential causes of DTC P0794 on a BMW can include a faulty intermediate shaft speed sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning PCM.
BMW DTC P0794 seriousness
Ignoring DTC P0794 on a BMW can lead to further transmission issues and potential drivability problems. It is important to address this fault code promptly to prevent damage to the transmission system.
How to diagnose DTC P0794 on BMW
To diagnose DTC P0794 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and perform a visual inspection of the intermediate shaft speed sensor and its wiring. They may also conduct tests to check the sensor’s output signal and verify its operation.
How to fix DTC P0794 on BMW
Fixing DTC P0794 on a BMW may involve replacing the intermediate shaft speed sensor if it is found to be faulty. Additionally, repairing any damaged wiring or connectors in the sensor circuit and ensuring proper connections can help resolve the issue.
How to erase DTC P0794 on BMW
Once the underlying issue causing DTC P0794 on a BMW has been fixed, the fault code can be cleared using a diagnostic scanner. By erasing the code, the Check Engine Light should turn off, indicating that the problem has been addressed.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.