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Where is a HO2S21 sensor located on a 99 mecury cougar?

\015 While working on my car to try to fix the reason the engine light is on i hooked up the obd and got the code P1151 which is lack of HO2S21 sensor indicates lean I need to know where the sensor is located the front of the engine or side?\015 Posted / edited by AnonymousUser on : 01-06-2020

Answers :

Its saying bank 2 sensor 1\012\012Bank 1 is the same side of the motor as the number one cylinder. Bank 2 is the other side of the engine. \012\012Sensor 1 is always before tha catalytic converter. Sensor 2 is always after the catalytic converter. \012\012Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!
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