service engine soon
Laughing Gas
Joined: Dec 2003
Posts: 751
Likes: 30
From: North Carolina
I know this is late but here goes. I believe bank 2 will be the driver's side, because the cylinder's are (passenger=1,2,3) and (driver's=456). Double check me on that. The problem is there are 2 o2 sensor's on each side, so which one is bad? Those things are not cheap, especially the 4- wire sensor's which I believe our truck's have. You may have already fixed the problem by now, sorry so late, but I've been a traveln, and I don't have a laptop I can log on with. Anybody got an old laptop you wanna donate to a mostly unworthy cause??
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Freshman User
Joined: Jul 2003
Posts: 35
Likes: 0
From: Mesquite
hey traveler. thanks. no havent gotten around to it yet. yeah i wish i knew exactly which one it was. but do you really think its the drivers side??? if not then im gonna have to change all 4 and will cost around $200. thanks for your help though. any other kind of help is greatly appreciated.
Freshman User
Joined: Jul 2003
Posts: 27
Likes: 0
From: KC
A rich/lean code should indicate the upstream sensor, the downstream sensor is typically for emissions and indicates to the ECM the differential between the inlet exhaust O2 content and outlet exhaust O2 content for the cat.
Before you pursue the O2 sensor, you might check for vacuum leaks and a dirty MAF sensor. These issues will normally give codes on both banks at once, but not always.
TJ
Before you pursue the O2 sensor, you might check for vacuum leaks and a dirty MAF sensor. These issues will normally give codes on both banks at once, but not always.
TJ
New User
Joined: Feb 2004
Posts: 2
Likes: 0
Did you ever fix your problem (P0174 code)? I have a '98 f150 with almost 100,000 miles and have the same code. I replaced the upstream O2 sensor on the driver's side (Bank 2) with no luck. Autozone is quick to diagnose the O2 sensor even though there are specific codes for them, not the P0174 and P0175. My next guess, was to check for a vacuum leak. Anyone else have any suggestions?
New User
Joined: Feb 2004
Posts: 2
Likes: 0
Did you ever fix your problem (P0174 code)? I have a '98 f150 with almost 100,000 miles and have the same code. I replaced the upstream O2 sensor on the driver's side (Bank 2) with no luck. Autozone is quick to diagnose the O2 sensor even though there are specific codes for them, not the P0174 and P0175. My next guess, was to check for a vacuum leak. Anyone else have any suggestions?
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