The O2 Sensor Problem That Doesn't Go Away!!!

**jdubbs928** · 07-25-2006, 02:05 PM

Ok, here's the deal. I've had O2 sims for quite ~2 years then I received a P0160 code (HO2S Circuit Insufficient Activity Bank 2 Sensor 2). I moved the O2 sim to the other side and received a P0140 code (HO2S Circuit Insufficient Activity Bank 1 Sensor 2). I figured this was the end of the problem so I bought a new O2 sim and replaced it on 6/12/06. A few weeks went by and now I have 3 codes P0154 (HO2S Circuit Insufficient Activity Bank 2 Sensor 1), P0155 (HO2S Heater Performance Bank 2 Sensor 1), and P1153 (HO2S Insufficient Switching Bank 2 Sensor 1). What is the deal? Could I have bought a bad O2 sim or is something else wrong here? I also did some research and think maybe I should get a tune. Will a tune fix this? I've posted my mods below.

Installed Mods

Engine
GM WS-6 Ram Air Hood
BG Ram Air Modification (True Ram Air)
Removed Baffles
Sealed Air Lid
Holley PowerShot Filter
SLP High Flow Lid
Borla cat-back Exhaust
QTECH 3" Electric Cutout
Jet-Hot Coated Hooker LT’s
Custom Y-pipe w/carsound cats
Hypertech Power Programmer III (w/o Power Tuning)
Hypertech 160 Degree Thermostat
Modified Coolant (25 Dexcool/75 Water with Purple Ice additive)
Throttle Body Bypass Mod
Custom PCV Mod
Bosch Platinum +4 Spark Plugs
MSD Ignition 8.5mm Plug Wires
Royal Purple 5w-30 Synthetic Blend
K&N Performance Gold Oil Filter (oversized)

Drivetrain
Hurst Billet/Plus Competition Short-Throw Shifter
Centerforce Dual Friction Clutch
Centerforce throw out bearing
Heavy Duty Pilot Bearing
Mcleod Adjustable Master Cylinder
Updated 145 Slave Cylinder
Drill Mod
Bulletproof T-56
Upgraded Synchronizers
Carbon Fiber Synchronizer Rings
Steel Shift Forks
Removed CAGS
Richmond 3.73 Rear Gears
Ratech Install Kit
TA Performance Girdle
TA Performance Stud Kit

Chassis/Suspension
BMR Tubular Subframe Connectors
BMR Shock Tower Brace
BMR Lower Control Arms
Prothane Transmission Mount
Prothane Torque Arm Mount
Prothane Front Sway Bar Mounts
Prothane Rear Sway Bar Mounts & endlinks

Wheels/Tires
18X9.5 Triple Chrome Plated Z06 wheels
Nitto NT 555 Extreme Performance Tires

Thanks,

Jeff

**2001NBMZ28** · 07-25-2006, 02:37 PM

Something else is going on - rear 02 SIMs, even if bad shouldn't affect Sensor 1 codes - right?

**sunsetorangess** · 07-25-2006, 02:45 PM

Did you reset the pcm when you instailed the new sim? If you get it tunned you can have the trouble codes deleted out, so yea thats one permanent way too fix it.
I would say you got a sour 02 sim.
J

**0rion** · 07-25-2006, 03:21 PM

The sim has nothing to do with your fronts. Those are common codes to have with LT's. The sensor is further downstream than the stock location. Why yours went so long before throwing the heater and switching codes is beyond me. I started throwing them almost immediately after my header install.

**jdubbs928** · 07-26-2006, 06:28 AM

Is there any way to fix this? If I replace the front O2 sensor will it just keep happening? Is it bad if I leave the codes unresolved (ex. delete them out and not worry about them)?

**jdubbs928** · 07-27-2006, 06:38 AM

Ttt

**fspeedster** · 07-31-2006, 05:11 PM

Originally Posted by jdubbs928

Is there any way to fix this? If I replace the front O2 sensor will it just keep happening? Is it bad if I leave the codes unresolved (ex. delete them out and not worry about them)?

You should replace the front sensors with bosh 13111. These are corvette 02 sensors. Many guys over at ls1tech.com , use this. Log on and do a search.