BMW DTC P1459 – Heated Catalyst Heater Power Supply Open Circuit (Bank 2)
DTC P1459 meaning on BMW
DTC P1459 on a BMW indicates a Heated Catalyst Heater Power Supply Open Circuit fault in Bank 2. This fault code is specific to the heated catalyst system, which is responsible for reducing emissions by quickly heating up the catalytic converter to operating temperature.
BMW DTC P1459 symptoms
Symptoms of DTC P1459 on a BMW may include:
- Check Engine Light illuminated
- Reduced engine performance
- Increased emissions
BMW DTC P1459 causes
The potential causes of DTC P1459 on a BMW include:
- Faulty heated catalyst heater
- Open circuit in the power supply to the heated catalyst heater in Bank 2
- Wiring or connector issues
BMW DTC P1459 seriousness
While DTC P1459 may not cause immediate drivability issues, it is important to address this fault as it can lead to increased emissions and potential long-term damage to the catalytic converter. Ignoring this fault can also result in the vehicle failing emissions tests.
How to diagnose DTC P1459 on BMW
To diagnose DTC P1459 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the wiring and connectors related to the heated catalyst heater in Bank 2
- Test the resistance of the heated catalyst heater
- Check for any blown fuses related to the heated catalyst system
How to fix DTC P1459 on BMW
To fix DTC P1459 on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring or connectors
- Replace the faulty heated catalyst heater
- Clear the fault code and perform a test drive to ensure the issue is resolved
How to erase DTC P1459 on BMW
To erase DTC P1459 on a BMW, the fault code can be cleared using a diagnostic scanner. After the repair has been completed, the mechanic can reset the fault code, and the Check Engine Light should turn off if the issue has been successfully 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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