BMW DTC U05A4 – PM Sensor Received Invalid Data From ECM/PCM
DTC U05A4 meaning on BMW
DTC U05A4 on a BMW indicates that the Pressure Monitoring Sensor (PM Sensor) has received invalid data from the Engine Control Module (ECM) or Powertrain Control Module (PCM). This means that there is a communication error between the PM Sensor and the ECM/PCM.
BMW DTC U05A4 symptoms
Symptoms of DTC U05A4 on a BMW may include:
- Malfunction indicator light (MIL) or check engine light illuminated on the dashboard
- Inaccurate tire pressure readings on the instrument cluster
- Loss of communication with the tire pressure monitoring system
BMW DTC U05A4 causes
Possible causes of DTC U05A4 on a BMW include:
- Faulty Pressure Monitoring Sensor (PM Sensor)
- Wiring or connection issues between the PM Sensor and ECM/PCM
- ECM/PCM software or hardware issues
BMW DTC U05A4 seriousness
DTC U05A4 should be addressed promptly as it can affect the accuracy of the tire pressure monitoring system, potentially leading to unsafe driving conditions. Ignoring this DTC may result in incorrect tire pressure readings and compromise vehicle safety.
How to diagnose DTC U05A4 on BMW
To diagnose DTC U05A4 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer
- Inspect the wiring and connections between the PM Sensor and ECM/PCM for any damage or corrosion
- Check the PM Sensor for proper operation and signal output
- Perform a communication test between the PM Sensor and ECM/PCM
How to fix DTC U05A4 on BMW
To fix DTC U05A4 on a BMW, consider the following steps:
- Replace the faulty Pressure Monitoring Sensor (PM Sensor)
- Repair any damaged wiring or connections between the PM Sensor and ECM/PCM
- Update the ECM/PCM software if necessary
- Clear the fault codes using a diagnostic scanner
How to erase DTC U05A4 on BMW
To erase DTC U05A4 on a BMW, use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. Once the issue has been resolved and the fault codes erased, the check engine light should turn off. Ensure that the repair has been successful by performing a test drive and monitoring the tire pressure monitoring system.
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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