HC Adsorption Catalyst Efficiency Below Threshold - Bank 2
What does P2424 mean?
The P2424 code means the vehicle's onboard diagnostic system has detected: HC Adsorption Catalyst Efficiency Below Threshold - Bank 2. This is a moderate severity code.
Common Symptoms
- Check Engine Light illuminated
- Failed emissions test for hydrocarbons
- Mild fuel odor from exhaust
- Reduced catalytic converter efficiency on bank 2
- No significant drivability symptoms
Probable Causes (Ranked by Likelihood)
- Degraded HC adsorption catalyst on bank 2 Very High
- Rich fuel mixture contaminating bank 2 catalyst High
- Exhaust leak on bank 2 before the catalyst Moderate
- Oil consumption fouling the catalyst Moderate
Step-by-Step Diagnostic Procedure
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Compare bank 1 and bank 2 catalyst efficiency readings
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Check for rich-running conditions on bank 2 using fuel trim data
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Inspect exhaust manifold and pipes on bank 2 for leaks
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Check for oil consumption that could foul the catalyst
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Evaluate O2 sensor readings upstream and downstream of the bank 2 catalyst
Frequently Asked Questions
Can I drive with code P2424?
Short distances are fine. The vehicle will have elevated hydrocarbon emissions but is generally safe to drive.
What causes P2424?
A degraded catalyst on bank 2 is most common. Address any rich-running conditions first as they accelerate catalyst deterioration.
Is P2424 expensive to fix?
Costs range from $200 to $1500. European vehicle catalytic converters are expensive. Fix root causes like rich running or oil burning first.