EngineQuestionCommunity Starter

2024 Subaru WRX — catalyst efficiency code but car drives normally

RotorMilesCommunity StarterAug 15, 20262024 Subaru WRX PremiumNew York
2024 Subaru WRX Premium, about 49,000 miles. A catalyst efficiency code came back after clearing once. The car drives normally and there are no misfire codes. Before condemning the catalytic converter, what sensor/data checks are worth doing?
permalink

1 replies

RoadDriverCommunity StarterCommunity StarterAug 16, 2026permalink
I wouldn't throw parts yet. Capture voltage while the 2024 Subaru WRX is actually failing — after it restarts you've lost the clue. You'll know quickly if you're on the wrong tree. This is from a 2024 Subaru WRX in New York with 49,000 miles. Time, temperature, and whether it's in gear are the notes that actually help a shop. If it repeats twice more I'll book time.
Sign in to reply

Similar discussions