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OBD II P0420, Catalyst System Efficiency Below Threshold. In some cases, there may be some performance problems noticed by the driver such as a lack of power from a restricted and/or damaged Catalytic Converter.
Common Problems That Trigger the P0420 Code
- Inefficient Catalytic Converter(s)
- Defective Front or Rear Oxygen Sensor(s)
- Misfiring engines
Common Misdiagnoses
- Oxygen Sensors good-day ! hope this helps !
What else can I help you with?
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Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
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P0420 is catalytic converter efficiency failure.
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Trouble code P0420 means:Catalyst system efficiency below threshold
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Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
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Trouble code P0420 means:Catalyst system efficiency below threshold
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P0420 is bank one catalytic converter efficiency failure.
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P0420, bank one catalytic converter efficiency failure.
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Trouble code P0420 means:Catalyst system efficiency below threshold
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Trouble code P0420 means:Catalyst system efficiency below threshold
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Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
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Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
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Usual first sign is a check engine light with a code P0420.Usual first sign is a check engine light with a code P0420.
