P0429 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0429 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0429 code.

What Does P0429 Code Mean?

OBD-II Code P0429 is defined as a Catalyst Heater Control Circuit

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 P0429.

Common Problems That Trigger the P0429 Code

• Catalytic converter failure
• Catalytic converter failure
• Powertrain Control Module (PCM) failure
• Wiring issue