Welcome to RennTech.org Community, Guest
There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.
Here are some of the features available - once you register at RennTech.org
- View Classified Ads
- DIY Tutorials
- Porsche TSB Listings (limited)
- VIN Decoder
- Special Offers
-
OBD II P-Codes - Paint Codes
- Registry
- Videos System
- View Reviews
- and get rid of this welcome message
It takes just a few minutes to register, and it's FREE
Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)
- No ads - advertisements are removed
- Access the Contributors Only Forum
- Contributing Members Only Downloads
- Send attachments with PMs
- All image/file storage limits are substantially increased for all Contributing Members
- Option Codes Lookup
- VIN Option Lookups (limited)
Search the Community
Showing results for tags 'p1123 cel maf o2'.
Found 1 result
-
Drove home and CEL came on. Attached my Durametric. Error code is P1123. No other error codes. Car is stock with 20k miles. No recent known problems. I did have a non-start problem before: http://www.renntech.org/forums/topic/43615-changed-oil-installed-997-shifter-now-car-wont-start/ ...but after replacing the fuel filter, I haven't seen any symptoms in five months. Idle is at 680 RPM. Air Mass reading is 15-16 kg/h at idle and 50 kg/h at 2500RPM with no load. Oxygen sensing reading for cylinders 1-3 is 1.01 to 1.05 and for cylinders 4-6 s 0.99 to 1.02. O2 sensors read between 0.4V (lean) to 0.78v at idle and 2500RPM with no load. Due to wife and nagging woman problems, I won't have time to dig into the car until this weekend. Checking the EVAP canister purge valve is on the top of my "to do" list. So I do apologize for posting without doing as much due diligence as possible, but, again, time concerns. Some guidance up front could easily prevent me from unnecessarily replacing moderately expensive parts. Due to the lack of other CEL codes, the fact the car is running rich and I don't plan on driving it hard, and the code being a non-serious error, I cleared the error code and will drive it the rest of the week to see if the error retriggers. So, my initial questions for the masterminds here: In Durametric, what is "oxygen sensing reading"? My best guess is that it is the flow rate injector compensation, but if that is the case, the value was changing constantly. Does that 0 to 0.03 discrepancy noticed between cylinder banks provide any useful information to further diagnose the cause? The MAF sensor readings look within spec, and since the MAF affects both cylinder banks, it seems unlikely to be the culprit. But, the sensor is 14 years old, countered by it only having 20k miles. From what I have read, the MAF sensor seems to take the blame for a lot of P1123 issues. But that could be misdiagnosed, especially if the issue is not easily reproducible. The O2 sensor values seem right, but I'm basing that on other vehicles, and the car wasn't under load. Do those values tip off any red flags? Are there any other metrics I can pull from the Durametric that might reduce the number of potential areas to investigate? Thank you!