2019 Cadillac P0430: What It Means & Is It Safe to Drive?
P0430 on the 2019 Cadillac: Catalyst System Efficiency Below Threshold (Bank 2). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
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What this code means
Same as P0420 but for bank 2. The catalytic converter on bank 2 is not operating efficiently.
Common causes on the 2019 Cadillac
- Failed catalytic converter (bank 2)
- Faulty O2 sensor(s)
- Exhaust leak
Symptoms
- Check Engine Light
- May fail emissions
Typical fixes
- Replace bank 2 catalytic converter
- Replace oxygen sensors
- Repair exhaust leaks
Repair cost range
For a 2019 Cadillac, repairs for P0430 typically fall between $400 and $2400, depending on the root cause and labor rates in your area.
Known issues on Cadillac
Cadillac 3.6L V6 P0430 bank 2 catalyst mirrors P0420. On LGX and LFX engines, verify both bank fuel trims are correct before replacing the converter—oil consumption-related rich conditions from VVT actuator wear can poison bank 2 catalysts prematurely.
Most commonly affected models
SRX 3.6L 2010–2016CTS 3.6L 2014–2019XT5 3.6L 2017–2022