Service Engine Soon Code P0156

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Jul 12, 2011 | 02:24 PM

bacchus99

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Service Engine Soon Code P0156

2003 F150 4.6L 100,600 miles. Code reader says:
Oxygen sensor
Circuit Bank 2
Sensor 2
I'm assuming that's post Catalytic Converter on the passenger side?

Any helpful wisdom as I try to diagnose the issue? Hate to just throw parts at it. Thanks in advance!

Jul 12, 2011 | 05:16 PM

projectSHO89

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From: St Louis

Downstream driver's side. Swap it with the other side, reset it, and see if the code stays the same or swaps to a P0136.

Jul 12, 2011 | 07:13 PM

bacchus99

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Quote:

Originally Posted by projectSHO89

Downstream driver's side. Swap it with the other side, reset it, and see if the code stays the same or swaps to a P0136.

So i'm assuming if the code follows the sensor its pretty safe to say that sensor is bad? If it stays the same then maybe wiring or something else is the issue?

Wires look good...no obvious problems there...i'm gonna check for exhaust leaks in the area of the sensors next. And then swap them this weekend...of course i need a new inspection sticker in the next couple of weeks lol...usually how that works.

Any tips on getting them out? Thanks.

Jul 12, 2011 | 08:13 PM

projectSHO89

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From: St Louis

Big wrench of the right size is what I use....

Jul 12, 2011 | 09:33 PM

bacchus99

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Quote:

Originally Posted by projectSHO89

Big wrench of the right size is what I use....

LOL i hear ya but i figure since they have been thru a million hot/cold cycles they may be stubborn? Should i attempt to remove them while everything is cold or hot or warm? Any creep or similar necessary? Just trying to prevent making a bigger problem. Thanks.

Jul 13, 2011 | 07:07 AM

projectSHO89

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From: St Louis

Spray 'em down with PB Blaster a while before trying to crack them.

Jul 14, 2011 | 10:49 AM

bacchus99

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Service Engine Soon light decided to turn off by itself...we'll see if it'll stay off. Threw a can of seafoam in the gas yesterday...maybe it'll help out.