BMW DTC P1814 – Output Shaft Speed Sensor Gradient Too High
DTC P1814 meaning on BMW
DTC P1814 on a BMW indicates that the Output Shaft Speed Sensor Gradient is too high. This means that the rate of change in the output shaft speed sensor signal is outside the normal operating range. The output shaft speed sensor is a crucial component that helps the vehicle’s transmission control module monitor the speed of the output shaft, allowing for proper gear shifting and overall transmission operation.
BMW DTC P1814 symptoms
Symptoms of DTC P1814 on a BMW may include erratic shifting behavior, harsh shifting between gears, delayed engagement when shifting, transmission slipping, and in some cases, the transmission may go into a limp mode to prevent further damage.
BMW DTC P1814 causes
The most common causes of DTC P1814 on a BMW include a faulty output shaft speed sensor, damaged wiring or connectors related to the sensor, low transmission fluid level or contaminated fluid, or issues with the transmission control module.
BMW DTC P1814 seriousness
Ignoring DTC P1814 on a BMW can lead to further transmission damage and potentially unsafe driving conditions. It is important to address this issue promptly to prevent more severe transmission problems and ensure the vehicle operates safely.
How to diagnose DTC P1814 on BMW
To diagnose DTC P1814 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and further investigate the output shaft speed sensor and related components. They may perform a visual inspection of the sensor and its wiring, check the transmission fluid level and condition, and conduct tests to verify the sensor’s functionality.
How to fix DTC P1814 on BMW
Fixing DTC P1814 on a BMW often involves replacing the faulty output shaft speed sensor, repairing any damaged wiring or connectors, ensuring the transmission fluid is at the correct level and in good condition, and resetting the fault code. In some cases, recalibrating or reprogramming the transmission control module may also be necessary.
How to erase DTC P1814 on BMW
To erase DTC P1814 on a BMW, a mechanic can use a diagnostic scanner to clear the fault code from the vehicle’s memory. After addressing the underlying issue causing the fault code, clearing it from the system will reset the transmission control module and allow for proper monitoring of the output shaft speed sensor.
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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