P2423moderate severityPowertrain
HC Adsorption Catalyst Efficiency Below Threshold (Bank 1)
on 2005 Dodge Viper 8.3L V10 · RWD
What this code means
The hydrocarbon adsorption catalyst on bank 1 is not trapping and converting HC emissions effectively. This usually means the catalyst has degraded over time.
Symptoms
- Check engine light on
- Failed emissions test
- Reduced catalyst performance
Common causes
- Degraded or aged catalyst
- Exhaust leak upstream of catalyst
- Faulty oxygen sensor readings
- Engine running rich causing damage
Diagnostic steps
- Scan and verify related codes
- Inspect exhaust system for leaks
- Check oxygen sensor operation
- Replace catalyst if efficiency low
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Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0006
Fuel Shutoff Valve A Control Circuit Low
P0007
Fuel Shutoff Valve A Control Circuit High
P0008
Engine Position System Performance - Bank 1
P0009
Engine Position System Performance - Bank 2
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1