BMW DTC P1571 – Electronic Control Module Sensor Supply A High Output
DTC P1571 meaning on BMW
DTC P1571 on a BMW indicates that the Electronic Control Module (ECM) has detected a high output from Sensor Supply A. This fault code typically points to an issue with the sensor supply voltage being higher than the specified range.
BMW DTC P1571 symptoms
Symptoms of DTC P1571 on a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Engine stalling or rough idling
- Increased fuel consumption
BMW DTC P1571 causes
Common causes of DTC P1571 on a BMW include:
- Faulty sensor
- Short circuit or open circuit in the sensor wiring
- ECM malfunction
- Voltage regulator issues
BMW DTC P1571 seriousness
While DTC P1571 may not always result in immediate drivability issues, it is important to address this fault code promptly to prevent potential damage to other components and ensure optimal vehicle performance.
How to diagnose DTC P1571 on BMW
To diagnose DTC P1571 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the sensor supply wiring for any visible damage or corrosion
- Test the sensor supply voltage using a multimeter
- Check the sensor’s resistance and functionality
- Inspect the ECM for any signs of damage or malfunction
How to fix DTC P1571 on BMW
Depending on the root cause of DTC P1571, the following steps may be taken to fix the issue:
- Replace the faulty sensor
- Repair any damaged wiring or connectors
- Address any ECM malfunctions or faults
- Check and repair the voltage regulator if necessary
How to erase DTC P1571 on BMW
To erase DTC P1571 on a BMW, the fault code can be cleared using a diagnostic scanner. After addressing the underlying issue and fixing the root cause, the code can be cleared to reset the Check Engine Light and ensure that the repair was successful.
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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