수리 사례

2026. 6. 30. 작업

증상

Failed emissions - high lambda, low HC and CO

처리 내용

Do not put your bare hand over the tailpipe, it will get burnt. If you cannot hear an exhaust leak, puff puffing, you can pressurise the exhaust system with a rag over the tailpipe to make an exhaust leak more pronounced and tracible. The downside to this is that you can destroy the catalytic converter, so it is really not a good idea to do it. The way forward is to check the exhaust with eyes and ears. Eyes to see any black soot around a joint which means a leak, ears to hear a gas escape. The lambda reading you have provided may point to an exhaust leak, but without an exhaust leak it will mean a weak running condition of the engine. Prime suspects are the MAF sensor, MAP sensor, front oxygen sensor, fuel injector(s), or leaking or disconnected air hoses or vacuum pipes. Ideally with an ODBII scanner check the readings of the systems before you start spending money on replacement parts.