BMW DTC P2423 – HC Adsorption Catalyst Efficiency Below Threshold (Bank 1)
DTC P2423 meaning on BMW
DTC P2423 on a BMW indicates that the efficiency of the hydrocarbon (HC) adsorption catalyst in Bank 1 is below the threshold. This means that the catalyst is not effectively reducing the hydrocarbon emissions as intended, which can lead to increased pollution and potential issues with the vehicle’s emissions system.
BMW DTC P2423 symptoms
Symptoms of DTC P2423 on a BMW may include:
- Check Engine Light illuminated
- Decreased fuel efficiency
- Reduced engine performance
- Increased emissions
BMW DTC P2423 causes
Common causes of DTC P2423 on a BMW include:
- Failed HC adsorption catalyst
- Excessive hydrocarbon buildup in the catalyst
- Exhaust leaks
- Issues with the oxygen sensors
BMW DTC P2423 seriousness
DTC P2423 should not be ignored as it can lead to increased emissions and potential damage to the vehicle’s emissions system. Continued driving with this fault can also result in decreased fuel efficiency and engine performance.
How to diagnose DTC P2423 on BMW
To diagnose DTC P2423 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code
- Inspect the HC adsorption catalyst for damage or contamination
- Check for exhaust leaks
- Test the oxygen sensors for proper function
How to fix DTC P2423 on BMW
To fix DTC P2423 on a BMW, the following steps may be taken:
- Replace the HC adsorption catalyst if it is damaged or contaminated
- Repair any exhaust leaks
- Replace faulty oxygen sensors
- Clear the fault code and reset the Check Engine Light
How to erase DTC P2423 on BMW
To erase DTC P2423 on a BMW, a diagnostic scanner can be used to clear the fault code from the vehicle’s computer. Once the issue has been addressed and fixed, the code can be cleared to reset the system and turn off the Check Engine Light.
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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