Posts Tagged: P0430
Catalytic Converter Cleaner: Miracle Fix or Temporary Band-Aid?
Why Catalytic Converter Cleaner Rarely Works Long-Term Quick Summary A catalytic converter cleaner may, in certain cases listed below, temporarily eliminate a P0420 or P0430 trouble code. 1) Your cat is borderline failing and has carbon buildup or deposits that are reducing the converter’s efficiency 2) The underlying problem is due to excessive oil consumption, coolant leaks, or running rich, which has fouled but not damaged the catalyst 3) You catch it early, before the substrate is physically degraded Catalytic Converter Cleaners Don’t Work When: 1) The catalyst substrate is … Read More
Why Oxygen Sensors Rarely Cause P0420 or P0430 Codes
Understanding the Relationship Between the O2 Sensors and a P0420 or P0430 Code Quick summary An oxygen sensor rarely causes a P0420 or P0430. That’s because the engine computer needs a working oxygen sensor to even test catalytic converter efficiency. A P0420 or P0430 means the converter is no longer storing oxygen properly, or there are underlying issues like exhaust leaks, fuel trim problems, or engine conditions that slowly killed the converter. Understanding how the computer uses the oxygen sensor data makes diagnosing P0420 and P0430 far more accurate and … Read More