BMW DTC P1505 – Vehicle Speed Implausible
DTC P1505 meaning on BMW
DTC P1505 on a BMW indicates a fault with the vehicle speed sensor circuit, specifically an implausible signal. This means that the Engine Control Module (ECM) is receiving a speed signal that is outside of the expected range or is inconsistent with other sensor inputs.
BMW DTC P1505 symptoms
Symptoms of DTC P1505 on a BMW may include erratic speedometer readings, cruise control malfunctions, transmission shifting issues, and in some cases, the vehicle may go into a limp mode where it limits performance to protect the drivetrain.
BMW DTC P1505 causes
The most common causes of DTC P1505 on a BMW are a faulty vehicle speed sensor, damaged wiring or connectors in the speed sensor circuit, or a malfunctioning ECM. Other potential causes could include issues with the ABS system or wheel speed sensors.
BMW DTC P1505 seriousness
While DTC P1505 is not a critical fault that will leave you stranded, it can affect the drivability and safety of your BMW. Ignoring this fault can lead to further damage to the vehicle’s drivetrain components and may result in unexpected behavior while driving.
How to diagnose DTC P1505 on BMW
To diagnose DTC P1505 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the speed sensor and its wiring. They may also test the sensor’s output using a multimeter to ensure it is functioning correctly.
How to fix DTC P1505 on BMW
Fixing DTC P1505 on a BMW usually involves replacing the faulty vehicle speed sensor or repairing any damaged wiring or connectors in the circuit. In some cases, reprogramming or replacing the ECM may be necessary if the issue lies with the control module itself.
How to erase DTC P1505 on BMW
Once the underlying issue causing DTC P1505 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the ECM’s memory and turn off the Check Engine Light. It’s important to ensure that the repair has been successful before clearing the 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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