Kreinmc

I recently had a check engine light, so I pulled the codes and got p0132 and p0152.

P0132 is bank 1 sensor 1 o2 sensor
P0152 is bank 2 sensor 1 o2 sensor

Should I replace both of my front o2's?

Injuneer

Both those codes are for "high voltage", and set when the PCM sees extended periods of a steady reading above 775mV. It there a possibility its actually running that rich (although it would probably be setting a code for "rich")? Is it possible you have some sort of a wiring problem with the extensions for the JetHots? Maybe the +12V for the heater circuits is shorting to the O2 sensor element wire???

Kreinmc

Well the car has never run right since I added the LT's. I did have a problem during installation though. My extension as too long and i jacked the car up by the kmember and started the car. The car started to smoke and it turned out that I pinched the o2 extention between the jack and the kmember. The o2 completely melted. This was on the passenger side btw. Why would I get this reading on both sides though. Also, the extentions are not homemade. How should I go about checking to see if the +12V for the heater circuit is shoring to the o2 sensor element wire? Will i be able to see this visually or do i need to use my volt meter? Thanks

CamaroSS30thAnn

i sujest replacing 02s with headers on high mileag cars, it took 2 days for mine to mess up , and replacing them fixed it , but mine ran really rich with a looow mV count

Kreinmc

They were replaced when I did the headers. I put the headers in about 10k ago.

Kreinmc

Ttt

Injuneer

You could try measuring the voltage at each of the 4 wires on the O2 sensor harness connector. Use a very high impedance multi meter. You should see +12V on the brown wire. The black wire is the ground for the heater circuit. You can measure the voltage across the tan and the purple (or purple/white) wires and it should be less than 1V.... typically about 0.45 volts.

LearJet

I know I am bumping a 2 year old thread but my car just developed the same issue. The thing is mine is running rich. fouling plugs out and smells rich. what would cause it to go rich all of a sudden??

Injuneer

Do you have those exact codes?

Increase in fuel pressure, MAF readings higher than actual air flow, would be two possible causes for a true rich condition.

Might want to add a "signature" with basic info about your car.... year, model, trans type, any major mods, etc.

LearJet

Yeah I have those exact 2 codes. I have been steadily getting rid of that SES since I started building the engine in this car and when I finally got them all this showed up. Funny thing is I had zero DTC's and then I snapped the sunshell in my old trans. The car sat for about 2 weeks waiting for the new one to be delivered and when I started it up after the trans install it seemed to run fine. Took it for a test drive and made it about a mile before I started fouling plugs out. Limped back to the shop and pulled all the plugs and they were all black as soot. Scanned the car and found P0132 and P0152. Cleaned all the plugs and double checked the wiring to the O2's and pulled them out as well. They were black too. These are Bosch O2's that were installed new about 1000 miles ago when I installed the headers. I wiped them off and put them back in and tried it again and the same thing happened, fouled plugs and same 2 codes. redid the plugs again and this time I leaned the car out with JET DST through the VE tables to prevent the plugs from fouling. I still get the same 2 code, car loads up at idle and starts to smoke if you sit too long, runs fine going down the road but still is rich. When I decelerrate I get some minor backfiring, nothing major just a sputter or two. I would really like to figure this out so I can go get dyno tuned. I added my sig.

LearJet

Going to check fuel pressures tonight. Still have not found the cause.

moparman

Bosch is not recommended. It seems as if the GM OEM sensors are the best ones to use.

LearJet

Yeah I read that too, after I bought the bosch ones. Also read numerous different opinions on whether or not you can cut the wires and lengthen them. I cut them and used solder and heat shrink to splice in the needed extension and it seemed to work fine...until this. I doubt that has anything to do wit hmy issue now though.

Injuneer

What did you wipe them with? Wiping them off doesn't accomplish much... all you can "wipe" is the protective steel shell that encases the sensitive zirconium membrane. Is it possible you pushed solvent or carbon into the slots, contaminating or plugging the membrane?

LearJet

I just wiped the carbon off the outside with a clean rag. I read you can try burning them off with a torch, how hot do you get them to try that?