P2423
HC Adsorption Catalyst Efficiency Below Threshold Bank 1
P2423 is an OBD-II diagnostic trouble code meaning: HC Adsorption Catalyst Efficiency Below Threshold Bank 1. Common causes: mechanical damage to the adsorption catalyst, adsorption catalyst clogged. Estimated repair cost: $33–167.
Symptoms
- Check Engine light comes on
- Slight increase in fuel consumption
- Smell of gasoline in the fuel tank area
- Reduced performance of the EVAP system
- Possible problems when passing technical inspection
Causes
- Mechanical damage to the adsorption catalyst
- Adsorption catalyst clogged
- EVAP system valve malfunction
- Leaks in the fuel vapor recovery system
- Problems with EVAP system pressure sensors
How to Fix
- Check the EVAP system for leaks
- Check the condition of the adsorption catalyst
- Test the operation of the EVAP system valves
- Check the readings of the system pressure sensors
- If necessary, replace the adsorption catalyst
Related codes
Error P2423 by Vehicle Brand
FAQ
What does the P2423 code mean?
P2423 is an OBD-II diagnostic trouble code that indicates: HC Adsorption Catalyst Efficiency Below Threshold Bank 1
What causes a P2423 error code?
The most common causes of P2423 include: Mechanical damage to the adsorption catalyst; Adsorption catalyst clogged; EVAP system valve malfunction; Leaks in the fuel vapor recovery system.
How do I fix a P2423 diagnostic trouble code?
To fix P2423: Check the EVAP system for leaks. Check the condition of the adsorption catalyst. Test the operation of the EVAP system valves. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2423?
Yes, but get it checked soon
How much does it cost to fix P2423?
The estimated repair cost for P2423 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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