BMW DTC P1851 – Gate Select Sensor Circuit Low
DTC P1851 meaning on BMW
DTC P1851 on a BMW refers to the Gate Select Sensor Circuit Low. This diagnostic trouble code indicates that there is a low voltage condition in the circuit related to the gate select sensor. The gate select sensor is responsible for detecting the position of the gear selector in the vehicle.
BMW DTC P1851 symptoms
Symptoms of DTC P1851 on a BMW may include issues with shifting gears, the gear selector not functioning properly, or the transmission not engaging correctly. The vehicle may also display a warning light on the dashboard indicating a transmission fault.
BMW DTC P1851 causes
The causes of DTC P1851 on a BMW can vary, but common reasons include a faulty gate select sensor, damaged wiring or connectors in the sensor circuit, or a malfunction in the transmission control module.
BMW DTC P1851 seriousness
DTC P1851 should be addressed promptly as it can lead to drivability issues and potential transmission problems. Ignoring this fault code may result in further damage to the transmission system and could compromise the safety and performance of the vehicle.
How to diagnose DTC P1851 on BMW
To diagnose DTC P1851 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer. They would then inspect the gate select sensor, wiring, and connectors for any visible damage or corrosion. Testing the sensor’s voltage and resistance may also be necessary to pinpoint the issue accurately.
How to fix DTC P1851 on BMW
Fixing DTC P1851 on a BMW may involve replacing the faulty gate select sensor, repairing damaged wiring or connectors, or reprogramming the transmission control module. It is essential to follow the manufacturer’s repair procedures and use quality replacement parts to ensure a proper fix.
How to erase DTC P1851 on BMW
Once the underlying issue causing DTC P1851 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. This process typically involves accessing the vehicle’s computer system, selecting the option to clear fault codes, and confirming the action. After clearing the code, it is recommended to test drive the vehicle to ensure the problem has been successfully 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
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