BMW DTC P2791 – Gate Select Direction Circuit Low
DTC P2791 meaning on BMW
DTC P2791 on a BMW refers to the Gate Select Direction Circuit Low. This diagnostic trouble code indicates that there is a low voltage condition detected in the gate select direction circuit.
BMW DTC P2791 symptoms
Symptoms of DTC P2791 on a BMW may include issues with shifting gears, such as difficulty engaging certain gears or the transmission not responding properly to gear changes. The vehicle may also experience erratic shifting behavior or fail to shift at all.
BMW DTC P2791 causes
The causes of DTC P2791 on a BMW can vary, but common reasons include a faulty gate select direction switch, damaged wiring or connectors in the circuit, or a malfunctioning transmission control module.
BMW DTC P2791 seriousness
DTC P2791 should be addressed promptly as it can lead to drivability issues and potential transmission damage if left unresolved. Ignoring this fault code may result in further transmission problems and could compromise the safety and performance of the vehicle.
How to diagnose DTC P2791 on BMW
To diagnose DTC P2791 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 direction circuit, check for any visible damage to the wiring or connectors, and test the gate select direction switch for proper functionality.
How to fix DTC P2791 on BMW
Fixing DTC P2791 on a BMW may involve replacing the faulty gate select direction switch, repairing any damaged wiring or connectors in the circuit, or reprogramming the transmission control module if necessary. It is recommended to follow the manufacturer’s repair procedures and use genuine BMW parts for a reliable fix.
How to erase DTC P2791 on BMW
Once the underlying issue causing DTC P2791 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. By clearing the code, the vehicle’s computer will reset the transmission system and turn off the check engine light. It is important to ensure that the repair has been successful before clearing the fault code.
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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