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Home › Jaguar › 2000 › XJ8 Base › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Trouble Code Identification › DTC P0430: Catalyst Efficiency Below Threshold (Bank 2) › Possible Causes

Possible Causes

HO2S disconnected.
HO2S to ECM wiring fault.
HO2S heater to ECM wiring fault.
HO2S heater failure.
Upstream HO2S failure.
Downstream HO2S failure.
Catalyst failure.