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OBD II Fault Code P0420 :

Description of OBD II Fault code P0420

CATALYST B1 EFFICIENCY BELOW THRESHOLD

Possible failuer of OBD II Fault code P0420

  • Catalyst failure

Diagnostic Procedure using AutoHex auto Scan tool tester

  • The data isn t obtained because B-CAN Frame can t be received.
  • The B-CAN System doesn t actuate.

Test Conditions using AutoHex Scan tool tester

  • When B-CAN Data is sending

Clear Fault codes Conditions

  • The data isn t obtained because B-CAN Frame can t be received.
  • The B-CAN System doesn t actuate.

MIL Status

  • Keyless Access Indicator ON

GDS KIA Ecu Flashing using AutoHex II


Note:

  • AutoHex is a professional OBD /OBD II diagnostic scanner / scan tool tester.
  • This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
    To get the accurate fault code description you may use AutoHex OBD scanner

More OBD II Fault codes:

OBD II Fault Code P0421
OBD II Fault Code P0422
OBD II Fault Code P0423
OBD II Fault Code P0424
OBD II Fault Code P0425
OBD II Fault Code P0426
OBD II Fault Code P0427
OBD II Fault Code P0428
OBD II Fault Code P0429
OBD II Fault Code P042A
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