BMW DTC P1751 – Secondary Pressure Solenoid Open Circuit (M52: System Voltage High)
DTC P1751 meaning on BMW
DTC P1751 indicates a fault with the Secondary Pressure Solenoid in a BMW transmission. This specific code is triggered when the solenoid circuit is detected as open, and the system voltage is considered high.
BMW DTC P1751 symptoms
Symptoms of DTC P1751 in a BMW may include harsh shifting, delayed gear engagement, transmission slipping, and in some cases, the transmission may go into a failsafe mode. The Check Engine Light may also illuminate on the dashboard.
BMW DTC P1751 causes
The primary causes of DTC P1751 in a BMW are typically related to issues with the Secondary Pressure Solenoid itself, such as a faulty solenoid, open circuit, or wiring harness problems. Additionally, high system voltage can also contribute to triggering this fault code.
BMW DTC P1751 seriousness
DTC P1751 should be addressed promptly to prevent further damage to the transmission system. Ignoring this fault code can lead to more severe transmission issues and potentially result in costly repairs.
How to diagnose DTC P1751 on BMW
To diagnose DTC P1751 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault code and then perform a thorough inspection of the Secondary Pressure Solenoid, wiring harness, and related components. Testing the solenoid for proper operation and checking the circuit for continuity are essential steps in diagnosing this issue.
How to fix DTC P1751 on BMW
Fixing DTC P1751 on a BMW usually involves replacing the faulty Secondary Pressure Solenoid and addressing any wiring or connection issues. It is crucial to use genuine BMW parts to ensure proper functionality and compatibility. After the repairs are completed, the transmission system should be tested to verify that the fault code has been resolved.
How to erase DTC P1751 on BMW
Once the underlying issue causing DTC P1751 has been fixed, the fault code can be erased using a diagnostic scanner. By clearing the code, the Check Engine Light should turn off, indicating that the fault has been addressed. It is important to ensure that the repair was successful before clearing the code to prevent the issue from reoccurring.
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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