soundjunky

iTrader: (4)

Scanned a car tonight, and after not being able to find what the codes were - I came back home, and opted to leave the car as-is, until I could determine that clearing the codes would be ok.

There were fourteen codes present, ten distinctly different codes.

What has me, is repeated "heater" ('HO2S) codes present, and if they would impact a cars running.

The car is described to be in limp mode (I did not want to try to take it on a test drive unless I had an idea what I was dealing with)...

Car in question, 2007 SS/SC.

codes observed (in numeric order):
P0036 - HO2S Heater Control Circuit Sensor 2 ECM, PCM (observed twice)
P0054 - HO2S Heater Resistance Sensor 2 ECM
P0096 - ??? (observed twice)
P0113 - Intake Air Temperature (IAT) Sensor 1 Circuit High Voltage ECM, PCM
P0131 - HO2S Circuit Low Voltage Sensor 1 ECM, PCM
P0137 - HO2S Circuit Low Voltage Sensor 2 ECM, PCM
P0141 - HO2S Heater Performance Sensor 2 ECM, PCM (observed twice)
P0171 - Fuel Trim System Lean ECM, PCM
P0172 - Fuel Trim System Rich ECM, PCM
P0300 - Engine Misfire Detected ECM, PCM (observed twice)

I was figuring on checking coolant level, and clearing codes...

But none of these codes seem to allude to the car running like crap... which brings me to why I'm posting this...

I'd sincerely appreciate any help CSS members could offer.

insylem

It seems like you have an O2 sensor problem. Id have a shop or something check youR o2 Sensors or replace them, or do it yourself. Cant telly ou wich. Odd that you have a RICH and a LEAN code, haha Normaly you get one of the other. Those, and the misfires can becaused by faulty o2 sensors. If it was my car, id erase the codes and if they came back Id swap out my o2 sensor, and erase the codes again.

06SS ALL DAY

id check the o2's. i started laughing when i seen the running lean and rich at the same time. any mods on the lsj? if so was the pcm replaced witha reflashed pcm or is it the stock pcm?

insylem

Sounds like its trying to run closed loop whith bad O2 sensors....
The rich and lean are probably thrown at diffrent times when
driving. : IE Some conditions the LTFT is >20 while others its <-20

5hizn1t

The P0096 is the IAT sensor 2 parameter is not within 16°C (29°F) of the IAT Sensor 1 parameter.

Coblasts

Check the connector on the pcm that the O2 sensors go to.
If the car is stock unplug one of the O2 sensors and see if the car starts to run a little better
Clear the codes and then plug the sensor back in and see if the codes come back.l

Have you checked the fuse for the O2 sensors. Could of shorted a power feed for the O2.

insylem

So wait,
Now im confused....
I had a bad IC pump for several months
My IAT2 was way more then 30 degrees hotter then my IAT1.
How come I never got P0096??

5hizn1t

lol.. I'm not sure. That's what the description is on GM Service Information site.