This diagnostic trouble code indicates an electrical open circuit in the heater control system for the catalytic converter on bank 2. This system is designed to rapidly heat the catalyst during cold starts to reduce emissions. When the circuit is open, the heater cannot function, though engine performance typically remains unaffected.
Exhaust heat often degrades insulation or melts wires near the converter.
The heating element within the catalytic converter assembly burns out over time.
A failure in the power supply circuit interrupts voltage to the heater.
Oxidation at the connector prevents current from flowing through the circuit.
Internal failure within the computer control circuit is very rare.
Yes, the vehicle is safe to operate, but the catalytic converter may not reach optimal efficiency quickly during cold starts.
No, PCM failure is extremely uncommon for this code; wiring and the heater element are the primary suspects.
Thermal cycling from exhaust heat can eventually crack wire insulation or burn out the heating element without prior warning.
Unlikely, as the circuit fault is permanent until the physical damage or component failure is repaired.