How to Tell If Your Oxygen Sensor Is Bad + Common DTC Code
How to Tell If Your Oxygen Sensor Is Bad + Common DTC Codes Your vehicle’s oxygen sensor keeps tabs on the air-fuel mixture in your engine. When it goes bad, it can trigger a host of performance problems. Here’s what to look out for and which diagnostic trouble codes (DTCs) might point to the issue. Symptoms of a Failing Oxygen Sensor Check Engine Light: The most frequent warning sign. A faulty oxygen sensor is a common reason it turns on. Decreased Fuel Efficiency: A bad sensor can throw off the fuel-air ratio, leading to higher fuel consumption. Engine Problems: Watch for rough idling, hesitation, stalling, or noticeable power loss. Unusual Exhaust Smoke: Thick black or white smoke could mean the engine is running too rich or too lean. Common Oxygen Sensor DTC Codes These trouble codes can help you identify issues with the oxygen sensor, especially in Bank 1 Sensor 1: P0130: O2 Sensor Circuit Malfunction P0131: O2 Sensor Circuit Low Voltage P0132: O2 Sensor Circuit High Voltag ...