BMW DTC P0603 – Internal Control Module Keep Alive Memory (KAM) Error
DTC P0603 meaning on BMW
The Diagnostic Trouble Code (DTC) P0603 for BMW indicates an Internal Control Module Keep Alive Memory (KAM) Error. This error occurs when the Engine Control Module (ECM) detects a fault in the module’s ability to retain certain critical information while the vehicle is turned off.
BMW DTC P0603 symptoms
Symptoms of a DTC P0603 on a BMW may include:
- Check Engine Light illuminated on the dashboard
- Engine running rough or stalling
- Problems with starting the vehicle
- Reduced fuel efficiency
BMW DTC P0603 causes
The common causes of a DTC P0603 on a BMW include:
- Weak or failing vehicle battery
- Faulty ECM or PCM
- Electrical issues such as poor connections or wiring problems
BMW DTC P0603 seriousness
While a DTC P0603 may not always result in immediate drivability issues, it is important to address this error code promptly. Ignoring this error can lead to potential long-term damage to the vehicle’s engine control system.
How to diagnose DTC P0603 on BMW
To diagnose a DTC P0603 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the specific error code
- Check the vehicle’s battery voltage and health
- Inspect the ECM connections and wiring for any signs of damage or corrosion
- Perform a thorough inspection of the ECM for any visible damage
How to fix DTC P0603 on BMW
To fix a DTC P0603 on a BMW, the following steps may be taken:
- Replace the vehicle’s battery if it is weak or failing
- Repair or replace any damaged wiring or connections related to the ECM
- If the ECM is faulty, it may need to be replaced or reprogrammed by a professional
How to erase DTC P0603 on BMW
To erase a DTC P0603 on a BMW, the error code can be cleared using a diagnostic scanner. After addressing the underlying issue that caused the error code, the scanner can be used to clear the code from the vehicle’s memory. This should reset the Check Engine Light and remove the DTC P0603 from the 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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