P0439 OBD-II: Catalyst Heater Control Circuit
P0439 Severity
Will P0439 go away on its own?
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
What causes OBD-II fault code P0439?
Some Catalytic Converters are electronically heated to get the Catalytic Converter up to operating temperature quicker. If the heating element fails, the engine control module (PCM) will set code P0439.
Ask our experts about P0439.
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