ckong

Just bought a 2001 Ls1 with long tube headers and it has a service engine light. I had it checked at autozone and it threw 11 errors saying all the o2 sensors were bad. Ive read some problems with long tube headers and i dont have a lot of knowledge with mechanics.


* P1153 Heated Oxygen Sensor - Bank 2 Sensor 1
insufficient switching
ECM has detected switch ratio of rich to lean and lean to rich was belo a determined number
Probable Cause;
-Failed HO2S21 heater circuit
-HO2S21 signal shorted ECM ground
-Improper oxygen supply to sensor



* P0141 Bank 1 Sensor 2
heater condition
the computer has recognized a failure in this circuit
Probable cause;
-Faulty HO2S12
-Poor connection at oxygen sensor
-Circuit fuse



* PO155 Bank 2 Sensor 1
heater condition
the computer has recognized a failure in this circuit
Probable cause;
-Oxygen sensor defective
-Poor connection at oxygen sensor
-Circuit fuse



* PO161 Bank 2 Sensor 2
heater condition
the computer has recognized a failure in this circuit
Probable cause;
-Oxygen sensor defective
-Poor connection at oxygen sensor
-Circuit fuse



** P1133 Heated Oxygen Sensor - Bank 1 Sensor 1
insufficient switching
ECM has detected switch ratio of rich to lean and lean to rich was belo a determined number
Probable Cause;
-Failed HO2S11 heater circuit
-HO2S-11 signal shorted ECM ground
-Improper oxygen supply to sensor



I need to get this car legal whats my best route?

02DroptopZ

iTrader: (3)

My car would throw those exact codes all the time before I had a mail order tune done after my headers. I would try that first. Also, do you still have rear O2 sensors? Most of the time with longtubes those sensors get deleted which also will cause a service engine light until you get a tune.

ckong

Not sure about the rears atm, what type of tuning did u have done

02DroptopZ

iTrader: (3)

It's just a simple mail order PCM tune, just Google "Tuned by Frost". He's a sponsor here and the one who did mine.

ckong

im looking into getting it locally tuned at PBJ here in st louis

decipha

they can take care of it as well

Are you near STL stangs?

ckong

im hoping to just tune out the rear o2's and
get the fronts working

flattusmaximus78

iTrader: (1)

A tune will take care of the rears, and set the fronts to no report if they are in fact working properly.

ckong

sounds good, will tuning out the rears allow me to remove cat converts?

ckong

bump*