O2 sensor problems.

[RIANT]

I have had my 2002 Explorer XLS since new, 247,150 miles. Do most of my own maintenance. After getting trouble codes P0141 and P061 I replaced both downstream O2 sensors and reset the light. After 30 mins of driving the service engine soon light came back on***!!!. Can any one out there steer me to a solution or another cause for these trouble codes. My code reader is not a Scan Tool, just the generic shade tree mechanic type. I hate going to the dealer!

 

[Lube]

When the CEL came back on, was it showing the same codes?

 

[celly]

Are you sure the sensors were bad, or were the codes telling you that the sensors were tipping you off about something else?

I just dealt with several P1151 codes. Also an o2 sensor code. The real issue was a faulty plug wire. The sensor did it's job. There is no code for "faulty spark plug wire". The condition gets captured by the sensor via the code. Doesn't mean the sensor is bad.

 

[BrooklynBay]

Welcome to this forum! I've moved your thread into the stock 2002-2005 section.

 

[Mustangman66]

Can you elaborate on some of the symptoms that you were experiencing? I have been throwing the same codes as you telling me Ive got a bad 02 sensor,

i took it to a shop to have them check the problem, and i paid $200 to have them reset the computer and rotate my tires. then they feed me some BS about filling it up with gas to often ...

anyways, here's some of the issues i noticed (some may not be related)

No power in the low end occasionally while accelerating.
splutter and almost die when slowing down occasionally.
Slow, it isn't as quick or fast as it used to be.
grinding noise in the front right wheel ONLY when turning right(likely unrelated)

let me know if you have experienced any similar symptoms,

thanks

 

[RIANT]

Searching for p0141&p0161 solutions

No problems with the operation...yet! Runs smooth, good mileage starts without problem, no smoke. I do need wheel bearings, i am going to do the front. I do not have a press so i do not know if i will do the rear. Still have not solved the p0141 and p0161 code light. A mechanic said that usually were some thing other than the o2 sensors. I am going to check the connection on the firewall today. Also going to look for vacume leaks, any suggestion on the best way to do this? Could a leaking valve cover gasket cause the error codes? Thanks in advance for any suggestions.

Riant