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Okay guys, I have been getting the CEL with this code for a while... reset, drive a few times, no light... then returns on way home from Autocross... So I order a post-cat O2 sensor and when I go to put it on, I notice that the Cat for bank 1 (Driver side) is on the other side because the exhaust crosses behind the engine... I assumed that since it monitored the exhaust from bank one that it just plugged in on the other side of the engine bay. I thought I was right because I drove it a few times with no light but on my way to Autocross last weekend, it came on again. Before I start undoing stuff, do I have it backwards or does the car look at it as Bank1 if the sensor is plugged in on the Bank 1 side. As anyone who has done this knows, it is a pain in the butt to get these in and out of a 996 GT3 so prior to subjecting myself to the discomfort, I figured I would solicit advice. Thanks!!!
My 1998 5 speed with 2.5L engine has fault codes 1128 and 1130. They popped up about a month ago when I took off in too high of gear and lugged the engine a little. We cleared the codes, but they are back. The vehicle registration is due on 1/8 and a CA smog is required. The car has always bellowed smoke occasionally on start up, but not very often though. Notice how oily it is around the intake? Is that normal? Should we try replacing the Air Oil Separator? The engine runs and starts great. We are piddling around with it now. The air filter is clean. We have the MAF sensor out and it looks okay. I'm reluctant to clean it (we have cleaner) because last time I tried (a decade ago perhaps) it had to be replaced. We don't have a fuel pressure test gauge, but am willing to buy one. Vacuum leaks are not apparent. I guess we'll look for vacuum leaks with smoke, we have cigars, no cigarettes.
So I'm having this issue that is driving me crazy. My SAI (Secondary AIr Injection) and Oxygen Sensor are not reaching "Ready Status"
A little background about my car.
2006 Boxster S 3.2L
FVD Exhaust system
GMS Headers with 200 cell cats - has all 4 O2 sensors attached.
996 throttle body and distribution hose
ECU Tuning Group tune
I had the car up in BC Canada since 2009 (although it is a US car) and had no problems passing the sniffer and obdII tests - both before and after all the mods except for the ECU tune.
I went to get my emissions testing done last week in Texas and failed due to the 2 systems being in not-ready status. I figured it might have to do with the cat delete (ROW) configured in the tune. I sent my ECU back to ETG in California and had them re-flash my ECU in order to re-enable the O2 sensors.
I cleared all codes and figured I would start fresh. I drove the car about 120 miles and attempted to follow the drive cycle mentioned in the forums but it was really tough with the roads out here. Everything is in ready status except for the SAI, and the O2 sensor. I can manually start the SAI using the Durametric system so I would believe the pump is not bad; however, I'm not
sure that I"m hearing the SAI start up when I cold start the engine.
For testing purposes I unplugged my O2 sensors from both bank1 and bank2 and they both threw fault codes which confirms that the ECU tune re-activated my sensors.
I've uploaded a few pictures with the results from a OBDII app as well as the Durametric Software to my Google Drive. I'm not quite sure how to interpret the Durametric Voltage results - especially the negative 50 V and -127V - seems quite odd.
Any help or guidance will be appreciated as I'm out of ideas.
I bought a 1999 996 C2 and it now has 135K miles. I lived in a state where I didnt need to smog it for a decade. Now that I live in California, I went to smog the car and had failed due to lean fuel mix issue at slow RPMs on the NOX test. Since the car hasn't had a lot of repairs on it in the last few years, I figured it was time to replace some basic stuff. I ordered a bunch of new O2 sensors off Fleabay and installed them. Boom I now get almost instant P1115 and P1119 codes.
I read Lorans advice on checking the ohms... Here is what my old units read and here is what the new plug and play O2 sensors are reading
Old O2: 2.7 ohms
Old O2: 2.9 ohms
New O2: 4.9 ohms
New O2: 4.8 ohms
The parts have the same part number stamped into the connections. However it's clear that the 996 is extremely unhappy with the new units. I take it that there is no way to reset the ECM to use the new ohms range... Should I replace the old units again until I can source new sensors and make sure they dont have a reading over 2.5?
As luck would have it, the day before I take the car for inspection the CE comes on. The friendly folks at Auto Zone diagnosed it as a O2 sensor. I don't recall the code at the moment, will follow up with that later.
At first he was not sure if it was an 'upstream' or 'downstream' sensor....further questioning led him to say 'upstream' but not real sure he got it right.
So, where is the location of the 'upstream' sensor?
Location of downstream sensor?
Are there only two sensors?
Is this a DYI in the driveway repair? am fairly handy with tools but is a lift needed?
A quick search shows bosch replacements - are they perform as well as OEM?
Thanks for your help