BMW DTC P1403 – Carbon Canister Shutoff Valve Control Circuit Electrical (M73: Heated Catalyst Battery Voltage or Current Too Low during Heating (Bank 2))
DTC P1403 meaning on BMW
The DTC P1403 on a BMW indicates an issue with the Carbon Canister Shutoff Valve Control Circuit Electrical related to the Heated Catalyst Battery Voltage or Current being too low during heating on Bank 2.
BMW DTC P1403 symptoms
Symptoms of the DTC P1403 on a BMW may include:
- Check Engine Light illuminated
- Reduced engine performance
- Increased fuel consumption
- Engine stalling or rough idling
BMW DTC P1403 causes
Common causes of the DTC P1403 on a BMW include:
- Faulty Carbon Canister Shutoff Valve
- Issues with the Heated Catalyst Battery
- Wiring or connection problems in the control circuit
- ECU (Engine Control Unit) malfunction
BMW DTC P1403 seriousness
The DTC P1403 should not be ignored as it can lead to reduced engine performance and increased emissions. While the vehicle may still be operable, it is recommended to address the issue promptly to prevent further damage.
How to diagnose DTC P1403 on BMW
To diagnose the DTC P1403 on a BMW, you can perform the following steps:
- Use an OBD-II scanner to retrieve the specific fault code
- Inspect the Carbon Canister Shutoff Valve and associated wiring for any visible damage
- Check the Heated Catalyst Battery for proper voltage and current
- Test the control circuit for continuity and proper operation
How to fix DTC P1403 on BMW
To fix the DTC P1403 on a BMW, you can try the following solutions:
- Replace the faulty Carbon Canister Shutoff Valve
- Repair or replace any damaged wiring or connections in the control circuit
- Address any issues with the Heated Catalyst Battery
- If necessary, have the ECU reprogrammed or replaced
How to erase DTC P1403 on BMW
To erase the DTC P1403 on a BMW, you can use an OBD-II scanner to clear the fault code after the underlying issue has been resolved. This will reset the Check Engine Light and allow you to monitor the system for any recurring problems.
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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