Help! Engine Stutter, CEL and P0171 code
Lead Lap
Joined: Feb 2010
Posts: 544
Likes: 22
From: Nebraska
I think of the A/F sensor as a more sophisticated O2 sensor. They are not interchangeable. Here's a link explaning A/F sensors http://www.motor.com/article.asp?article_ID=1643
Go to the Denso website to see which one you need. http://densoautoparts.com/find-my-pa...icle-selection
According to the Denso website, both your upstream sensors (Sensor 1) are A/F. Your downstream sensor (Sensor 2) is O2. Sensor 2 is on the exhaust pipe almost directly under the driver's seat.
If your error code is saying bank 1 sensor 1 (upstream rear) or bank 2 sensor 1 (upstream front) then you need the A/F. Note there are two different part numbers for the front and the rear upstream sensors.
Go to the Denso website to see which one you need. http://densoautoparts.com/find-my-pa...icle-selection
According to the Denso website, both your upstream sensors (Sensor 1) are A/F. Your downstream sensor (Sensor 2) is O2. Sensor 2 is on the exhaust pipe almost directly under the driver's seat.
If your error code is saying bank 1 sensor 1 (upstream rear) or bank 2 sensor 1 (upstream front) then you need the A/F. Note there are two different part numbers for the front and the rear upstream sensors.
Last edited by tomf; Apr 25, 2015 at 03:15 PM.
Instructor
Joined: Oct 2005
Posts: 1,091
Likes: 129
From: pa
I think of the A/F sensor as a more sophisticated O2 sensor. They are not interchangeable. Here's a link explaning A/F sensors http://www.motor.com/article.asp?article_ID=1643
Go to the Denso website to see which one you need. http://densoautoparts.com/find-my-pa...icle-selection
According to the Denso website, both your upstream sensors (Sensor 1) are A/F. Your downstream sensor (Sensor 2) is O2. Sensor 2 is on the exhaust pipe almost directly under the driver's seat.
If your error code is saying bank 1 sensor 1 (upstream rear) or bank 2 sensor 1 (upstream front) then you need the A/F. Note there are two different part numbers for the front and the rear upstream sensors.
Go to the Denso website to see which one you need. http://densoautoparts.com/find-my-pa...icle-selection
According to the Denso website, both your upstream sensors (Sensor 1) are A/F. Your downstream sensor (Sensor 2) is O2. Sensor 2 is on the exhaust pipe almost directly under the driver's seat.
If your error code is saying bank 1 sensor 1 (upstream rear) or bank 2 sensor 1 (upstream front) then you need the A/F. Note there are two different part numbers for the front and the rear upstream sensors.
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