Skip to content

OBD II Codes, OBD 2 Codes

  • Home
  • OBD2 (P0001-P0999)
  • OBD2 (P1000-P2000)
  • OBD2 (P2001-P3500)
  • OBD2 (U0001-U2500)
  • OBD2 (B0001-B2800)
  • OBD2 (C0001-C3000)

Tag: P0420

P0420 NISSAN Catalyst System Efficiency Below Threshold Bank 1

Possible causes – Three way catalyst converter Bank 1– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Engine Control Module (ECM) Tech notes As the code description

Read More P0420 NISSAN Catalyst System Efficiency Below Threshold Bank 1
Posted in OBDII Powertrain(P) Codes    Tagged nissan, P0420   

P0420 CADILLAC Catalyst System Low Efficiency Bank 1

Possible causes – Three way catalyst converter Bank 1– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Powertrain Control Module (PCM) Tech notes As the code description

Read More P0420 CADILLAC Catalyst System Low Efficiency Bank 1
Posted in OBDII Powertrain(P) Codes    Tagged cadillac, P0420   

P0420 BUICK Catalyst System Low Efficiency Bank 1

Possible causes – Three way catalyst converter Bank 1– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Powertrain Control Module (PCM) Tech notes As the code description

Read More P0420 BUICK Catalyst System Low Efficiency Bank 1
Posted in OBDII Powertrain(P) Codes    Tagged buick, P0420   

P0420 PONTIAC Catalyst System Low Efficiency Bank 1

Possible causes – Three way catalyst converter Bank 1– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Powertrain Control Module (PCM) Tech notes As the code description

Read More P0420 PONTIAC Catalyst System Low Efficiency Bank 1
Posted in OBDII Powertrain(P) Codes    Tagged P0420, pontiac   

P0420 GMC Catalyst System Low Efficiency Bank 1

Possible causes – Three way catalyst converter Bank 1– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Powertrain Control Module (PCM) Tech notes As the code description

Read More P0420 GMC Catalyst System Low Efficiency Bank 1
Posted in OBDII Powertrain(P) Codes    Tagged gmc, P0420   

P0420 CHEVROLET Catalyst System Low Efficiency Bank 1

Possible causes – Three way catalyst converter Bank 1– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Powertrain Control Module (PCM) Tech notes As the code description

Read More P0420 CHEVROLET Catalyst System Low Efficiency Bank 1
Posted in OBDII Powertrain(P) Codes    Tagged chevrolet, P0420   

P0420 SATURN Catalyst System Low Efficiency Bank 1

Possible causes – Three way catalyst converter Bank 1– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Powertrain Control Module (PCM) Tech notes As the code description

Read More P0420 SATURN Catalyst System Low Efficiency Bank 1
Posted in OBDII Powertrain(P) Codes    Tagged P0420, saturn   

Posts navigation

Newer posts →

Categories

  • OBD II Codes FAQs
  • OBD II Wiki
  • OBDII Body(B) Codes
  • OBDII Chassis(C) Codes
  • OBDII Network(U) Codes
  • OBDII Powertrain(P) Codes

Pages

  • OBD2 (B0001-B2800)
  • OBD2 (C0001-C3000)
  • OBD2 (P0001-P0999)
  • OBD2 (P1000-P2000)
  • OBD2 (P2001-P3500)
  • OBD2 (U0001-U2500)

Vehicle

acura AUDI BMW buick cadillac chevrolet chrysler dodge ford gmc honda hummer hyundai infiniti ISUZU JAGUAR jeep kia lexus MAZDA MITSUBISHI nissan P0101 P0102 P0122 P0123 P0171 P0174 P0302 P0303 P0304 P0305 P0306 P0335 P0340 P0720 P1111 pontiac saturn scion SUBARU SUZUKI toyota VOLKSWAGEN VOLVO
Copyright © 2025 OBD II Codes, OBD 2 Codes