99blackout

Ok so Ive had the code P1151 Ho2S21 for a while...I feel that i have received the wrong answer from people.....Some are saying that it is the passenger side front....some are saying the rear.....But I just wanted to make sure....which o2 sensor is HO2S21.....and how much would it sot me to get it fixed?
thanks
mike

stang2000

P1151 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2

It's more like likely not one of your O2 sensors. Check your MAF.

Here is a small article about maf's. Includes some trouble codes for O2 sensors.

http://autotechrepair.suite101.com/a...r_flow_sensors

stang2000

Also that should be the Drivers Front O2 sensor.

99blackout

See when the SES light first came on...i thought it was my MAF so i replaced it....well its still on

stang2000

Since the MAF replacement did you have your codes cleared? Like at an autostore or something?

99blackout

yea...i have an sct