BMW DTC P1813 – Output Shaft Speed Sensor Circuit Low
DTC P1813 meaning on BMW
DTC P1813 on a BMW indicates a fault with the Output Shaft Speed Sensor Circuit being detected as low. The Output Shaft Speed Sensor is responsible for monitoring the speed of the output shaft of the transmission. When the sensor circuit is reading a low signal, it suggests a potential issue with the sensor itself or the wiring associated with it.
BMW DTC P1813 symptoms
Symptoms of DTC P1813 on a BMW may include erratic shifting behavior, transmission slipping, harsh shifting, or the transmission going into limp mode. The vehicle’s transmission may also fail to engage properly or exhibit poor performance.
BMW DTC P1813 causes
The causes of DTC P1813 on a BMW can vary, but common reasons include a faulty Output Shaft Speed Sensor, damaged wiring or connectors in the sensor circuit, or issues with the transmission control module.
BMW DTC P1813 seriousness
DTC P1813 should be taken seriously as it can lead to drivability issues and potential transmission damage if left unresolved. It is recommended to address this fault promptly to prevent further complications.
How to diagnose DTC P1813 on BMW
To diagnose DTC P1813 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault code and further investigate the Output Shaft Speed Sensor and its circuit. They may perform visual inspections of the sensor, wiring, and connectors, as well as conduct electrical tests to pinpoint the exact cause of the fault.
How to fix DTC P1813 on BMW
Fixing DTC P1813 on a BMW may involve replacing the Output Shaft Speed Sensor if it is found to be faulty. Additionally, repairing any damaged wiring or connectors in the sensor circuit is crucial. In some cases, reprogramming the transmission control module or performing software updates may be necessary to resolve the issue.
How to erase DTC P1813 on BMW
Once the underlying issue causing DTC P1813 on a BMW has been addressed and fixed, the fault code can be erased using a diagnostic scanner. By clearing the code, the vehicle’s onboard computer will reset the Check Engine Light and monitor the system for any recurring faults.
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
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