BMW DTC P1578 – Speed Indication Instrument Pack / ASC Signal Correlation
DTC P1578 meaning on BMW
DTC P1578 on a BMW refers to a Speed Indication Instrument Pack / ASC Signal Correlation error. This diagnostic trouble code indicates a discrepancy between the speed signal received by the instrument cluster and the signal received by the ASC (Automatic Stability Control) system.
BMW DTC P1578 symptoms
Symptoms of DTC P1578 on a BMW may include:
- ABS (Anti-lock Braking System) warning light illuminated
- Traction control system warning light illuminated
- Inaccurate speedometer readings
- Loss of traction control functionality
BMW DTC P1578 causes
Common causes of DTC P1578 on a BMW include:
- Malfunctioning wheel speed sensors
- Faulty instrument cluster
- Wiring or connection issues between the instrument cluster and ASC system
BMW DTC P1578 seriousness
While DTC P1578 may not directly affect the drivability of the vehicle, it can impact the functionality of the ABS and traction control systems. It is important to address this issue to ensure proper operation of these safety systems.
How to diagnose DTC P1578 on BMW
To diagnose DTC P1578 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wheel speed sensors for proper operation
- Check the wiring and connections between the instrument cluster and ASC system
- Perform a visual inspection of the instrument cluster for any visible damage
How to fix DTC P1578 on BMW
To fix DTC P1578 on a BMW, the following steps may be taken:
- Replace any malfunctioning wheel speed sensors
- Repair or replace any damaged wiring or connections
- If the instrument cluster is faulty, it may need to be repaired or replaced
- Clear the fault codes and perform a test drive to ensure the issue has been resolved
How to erase DTC P1578 on BMW
To erase DTC P1578 on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the vehicle’s system. After the repair has been completed, the fault codes should be cleared to reset the system and ensure that the issue has been resolved.
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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