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Check engine light help!!!

C

Caloia1

New member
I have a 04 gtp. Check engine light came on, p0141 downstream sensor. So I replaced it, had code reset, 3 days later, this morning tje light came back on and hasnt gone off?? Any thoughts would be great.
 


Check the wiring harness.

Possible Solutions
Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
Repair short or open or high resistance in wiring harness or harness connectors

Read more at: http://www.obd-codes.com/p0141
Copyright © OBD-Codes.com
 
Yea that was my next step. Should I check the ecu were it runs to? Looks like under the air box I glanced after work tonight were it ran
 
No check the part of the wire harness that comes off the back side of the engine and goes down under the car, that is most likely where the bad spot is.

Sent from A Galaxy Far Far Away
 
Ok will do and ill keep you posted. Had it scanned before work this morning same code p0141. Got told that it could be the cat converter,and that bank one sensor two is the front sensor by the header? Incorrect I thought it was the downstream passed the cat?
 
Bank 1 sensor 1 is the one is the exhaust manifold that blocks easy access to #6 spark plug. Sensor 2 is post-cat converter.
 


Exactly what I thought so I replaced the right one. Gunna check fuses and wiring and go from there really frustrating tho
 
Hmmmm. I would check fuses. My 97 used to tell me my downstream o2 was shot whenever I blew the cig lighter fuse. Since its an 04, I don't think it's the cig lighter fuse but might be worth checking out.

Sent from my LG G3
 
Slick2500 said:
Yes but this code is bank 1 sensor 2. P0141

Sent from A Galaxy Far Far Away
Click to expand...


bank 1, sensor 2 is the post cat o2. we only have one bank with 2, o2 sensors. up and down steam.

and its the heater circuit code. means the heater inside the o2 is failed. so bad wires, or its a bad o2 you got try a delco
 
Im finally off work tomorrow so Im gunna check the fuses first, then the wiring. Just sucks the the wiring has that protected crap around it so u gotta cut it off to even see them. Hoping for a fuse. And as far as the o2 sensor being bad I dont wanna waste more money and put another one in and it still be on
 


Caloia1 said:
Im finally off work tomorrow so Im gunna check the fuses first, then the wiring. Just sucks the the wiring has that protected crap around it so u gotta cut it off to even see them. Hoping for a fuse. And as far as the o2 sensor being bad I dont wanna waste more money and put another one in and it still be on
Click to expand...
There is about 3-4 feet of wire for that sensor that isn't in the harness.

Sent from A Galaxy Far Far Away
 
The brand was ultra power. Found online for $35 bux. And yea ill check that 4 foot section,but if theres nothing there damaged I probably need to check the harness after that wouldn't u think. Im pretty good with cars but never really diagnosed a check engine light code like this.
 
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