P0424 OBD II Trouble Code Heated Catalyst Temperature Below Threshold Bank 1

Symptoms of P0424 OBD II Trouble Code

  • Decreased fuel efficiency
  • A lack of general engine performance
  • Excessive black smoke from exhaust
  • Other related diagnostic trouble codes
  • MIL (malfunction indicator lamp) illumination

Common Causes of P0424 OBD II Trouble Code

  • Malfunctioning diesel exhaust fluid injection system
  • Inadequate diesel exhaust fluid
  • Defective exhaust temperature sensor/s
  • Burnt, broken, or disconnected wiring and/or connectors

Severity of P0424 OBD II Trouble Code

If a code P0424 has been stored in your vehicle, it may be an indication that the diesel exhaust fluid injection system is not functioning. This code should be categorized as severe.