BMW DTC P1A26 – Drive Motor ‘B’ Inverter Current Too High
DTC P1A26 meaning on BMW
The DTC P1A26 code on a BMW indicates that the drive motor ‘B’ inverter current is too high. This means that the electrical current flowing through the inverter for the drive motor ‘B’ is exceeding the specified limits set by the vehicle’s computer system.
BMW DTC P1A26 symptoms
Symptoms of the DTC P1A26 code on a BMW may include:
- Reduced power or acceleration
- Engine stalling
- Check Engine Light (CEL) illuminated on the dashboard
- Vehicle going into limp mode
BMW DTC P1A26 causes
Common causes of the DTC P1A26 code on a BMW include:
- Faulty drive motor ‘B’ inverter
- Short circuit or open circuit in the inverter wiring
- Overheating of the inverter
- Issues with the power supply to the inverter
BMW DTC P1A26 seriousness
The DTC P1A26 code should be addressed promptly as it can lead to drivability issues and potential damage to the vehicle’s electrical system. Ignoring this code may result in further complications and could potentially leave the vehicle inoperable.
How to diagnose DTC P1A26 on BMW
To diagnose the DTC P1A26 code on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer system
- Inspect the drive motor ‘B’ inverter and its wiring for any visible damage or signs of overheating
- Check the power supply to the inverter to ensure it is within the specified range
- Perform a thorough inspection of the inverter components for any faults
How to fix DTC P1A26 on BMW
To fix the DTC P1A26 code on a BMW, the following steps may be taken:
- Replace the faulty drive motor ‘B’ inverter
- Repair any damaged or faulty wiring connected to the inverter
- Ensure proper cooling of the inverter to prevent overheating issues
- Verify the power supply to the inverter is stable and within the correct range
How to erase DTC P1A26 on BMW
After addressing the underlying issue causing the DTC P1A26 code on a BMW, the code can be cleared using a diagnostic scanner. This will reset the vehicle’s computer system and turn off the Check Engine Light. It is important to ensure that the repair has been successful before clearing the code to prevent it from reoccurring.
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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