Error code

Haval All models code P0420

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Meaning

Catalyst System Efficiency Below Threshold (Bank 1)

Signed-in members see the LED pattern and how to read the code with the remote control on eligible records.

Efficiency of the catalytic converter below threshold - frequently the oxygen sensors, not the converter itself

Solution steps are not shared for faults that may be dangerous.

No do-it-yourself solution is given for this fault. For your safety, call an authorised service.

Get help from a technician over a video call.