1996 Buick Park Avenue Q&A
Code Definition: Buick: Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2 This is generally due to a failed Oxygen sensor heater. The heater is part of the O2 Sensor and is similar to a cigarette lighter, when current is applied to it, it heats up. A quick check of the power and ground signal to the sensor, and a resistance check of the heater circuit will reveal the problem. - Bret Bodas
had check engine lite checked by auto zone. codes were p1441 , aa1.-failed canister purge solenoid/ or possible code aa2.-ftp pressure sensor. notice not getting good gas mileage as with last tank...