I have 2007 f150 4.2 v6 with 132k miles. Just got the truck with 125k. It was miss firing when accelerating. So i replaced the plugs and it ran great. 10 miles on the plugs and i get P0153 code. I dont know if the code is a symptom or if o2 is the problem. Dont want to replace o2 and find its the cat, or another internal problem. No other codes have ever show since the plugs have been changed. Been about a week and it drives great, but sucks at idle. Sputters down. Any ideas? Also did use injector clean on last tank of gas.

 

http://www.obd-codes.com/p0153

 

Thank you for the reply but i know what the code is. Was wondering why it happened to go off right after i replaced all my plugs. I dont want to change the sensor if its just a symptom of something else. Why after a plug change?

 

Did you read the whole article? It goes through causes and possible solutions, only one of which is a faulty O2 sensor.

 

I did, i want to know why after a plug change that the code came up. There is a connection. Checked hoses, and wires all is good. Want to know if anyone else had this happen after a plug change.

 

Check and fix any exhaust leaks
Check for wiring problems (shorted, frayed wires)
Check the frequency and amplitude of the oxygen sensor (advanced)
Check for a deteriorating / contaminated oxygen sensor, replace if necessary
Check for inlet air leaks
Check the MAF sensor for proper operation
Replace the Bank 2 oxygen sensor upstream of the catalytic converter