Sorry if this is not the right place but need help to try and figure out the cause of this P0430 engine code.

  • Car is a 2021 Camaro ZL1 with an aftermarket CAI and CatBack Exhaust.
  • Both primary and secondary CATS were left in place.
  • Bought the car with about 1200 miles and the check engine light first came on at about 14k miles
  • So far, I have replaced the the downstream 02 sensor on bank 2
  • Car doesn't feel sluggish or runs weird at all and no other codes



I can't imagine the CATS are bad this early? Hope this freeze frame data using VCM scanner tells something:

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Freeze Frame: 0
DTC: P0430 - Catalyst System Efficiency Below Threshold (Bank 2)
Fuel System Status: 04 00
Calculated Engine Load: 10.5882352941176 %
Engine Coolant Temp: 92 ?C
Short Term Fuel Trim Bank 1: 0 %
Long Term Fuel Trim Bank 1: -4.6875 %
Short Term Fuel Trim Bank 2: 0 %
Long Term Fuel Trim Bank 2: -3.125 %
Fuel Pressure: 444.000463128003 kPa
Engine RPM: 1625 rpm
Vehicle Speed: 115 km/h
Timing Advance: -3 ?
Intake Air Temp: 28 ?C
Mass Airflow: 12 g/s
Throttle Position: 21.5686274509804 %
O2 Voltage B1S1: 37.5 mV
O2 Voltage B1S2: 904.98046875 mV
O2 Voltage B2S1: 12.5 mV
O2 Voltage B2S2: 49.98046875 mV
Run Time Since Engine Start: 1718 s
Fuel Rail Pressure: 4 MPa
Commanded EVAP Purge: 0 %
Fuel Level Input: 72.156862745098 %
Warmups Since MIL Clear: 4
Distance Since MIL Clear: 182 km
EVAP System Vapor Pressure: 16352 kPa
Barometric Pressure: 101 kPa
Catalyst Temp B1S1: 768 ?C
Catalyst Temp B2S1: 718 ?C
Control Module Voltage: 13 V
Absolute Load: 12.156862745098 %
Commanded EQ Ratio: 1
Relative Throttle Position: 11.3725490196078 %
Ambient Air Temp: 27 ?C
Absolute Throttle Position B: 21.5686274509804 %
Accelerator Position D: 20 %
Accelerator Position E: 10.1960784313726 %
Commanded Throttle Actuator: 15.2941176470588 %
Fuel Type: 01
Actual Engine Torque: 7D
Engine Reference Torque: 01 DE
67: 01 84 00
68: 07 44 49 58 28 28 28
6D: 13 01 88 01 C0 00 00 00 01 C2 00
87: 01 02 EA 00 00
8E: 8A
9D: 00 2E 00 2E
9E: 00 E0
A6: 00 03 E0 06

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Thanks in advance.