codes
#2
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P1123 Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Lean Threshold
P1125 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Lean Threshold
This says that mixture is too rich and that DME can not adjust the the "too rich" mixture (Lean Threshold).
Potential causes are:
- Fuel pressure too high. -- possible
- Fuel injector leaking. -- not likely since you have the problem on both sides of the engine
- EVAP canister purge valve open. -- possible
P1125 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Lean Threshold
This says that mixture is too rich and that DME can not adjust the the "too rich" mixture (Lean Threshold).
Potential causes are:
- Fuel pressure too high. -- possible
- Fuel injector leaking. -- not likely since you have the problem on both sides of the engine
- EVAP canister purge valve open. -- possible
#3
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thanks, I just paid $300 in diagnostic time only to get the car back , drive 35 miles and have the light come back on. I just went and had the codes read/cleared for free . Could this be a symptom of this car not being driven enough? I noticed it was smoking at start up(like it was running rich) and it had been sitting quite awhile. Today it did not smoke when I started it . How do I check the evap cannister valve?
#4
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This seems to be a common problem with Boxsters. See: https://rennlist.com/forums/showthre...ht=P1123+P1125
I replaced the Mass Airflow Sensor last weekend with a new one, cleaned the airbox and intake, I even went back to a paper airfilter (I had a BMC in my car for the last 90k miles and 6.5 years). Then I cleared out the same error codes P1123, P1125 and P1130 (O2S Range 2 Cyl. 4-6). It was fine until today (three days after) the check light came back on.
The only difference with the new MAF ($300) the car runs better, but I think cleaning the old one with a brake cleaner ($5) would have done the same thing.
Does anyone have any thoughts on what else could be wrong and/or how can it be fixed?
Thanks
I replaced the Mass Airflow Sensor last weekend with a new one, cleaned the airbox and intake, I even went back to a paper airfilter (I had a BMC in my car for the last 90k miles and 6.5 years). Then I cleared out the same error codes P1123, P1125 and P1130 (O2S Range 2 Cyl. 4-6). It was fine until today (three days after) the check light came back on.
The only difference with the new MAF ($300) the car runs better, but I think cleaning the old one with a brake cleaner ($5) would have done the same thing.
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
Does anyone have any thoughts on what else could be wrong and/or how can it be fixed?
Thanks
Last edited by martinreinhardt; 06-21-2006 at 09:25 PM.
#5
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Interesting, it turns out there are NEW codes this time and the new MAF appeard to have solved the P1123, P1125 and P1130 error codes problem.
Now the new error codes are:
P0410 Secondary Air Injection System
P1411 Secondary Air Injection System Cyl. 4-6
Here is what I found so far on another forum http://www.renntech.org/forums/index.php?showtopic=6885
and a nice PDF diagnostic document:
http://www.theautomotivetechshop.com...SCHE/P0410.PDF
I will keep you updated
Now the new error codes are:
P0410 Secondary Air Injection System
P1411 Secondary Air Injection System Cyl. 4-6
Here is what I found so far on another forum http://www.renntech.org/forums/index.php?showtopic=6885
and a nice PDF diagnostic document:
http://www.theautomotivetechshop.com...SCHE/P0410.PDF
I will keep you updated
Last edited by martinreinhardt; 06-22-2006 at 12:00 AM.
#6
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Thecheck engine light has not come back on (yet). I'm tired of driving with my fingers crossed though. How many miles do I need to put on the car after clearing the codes before I can get smogged?
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Originally Posted by martinreinhardt
The only difference with the new MAF ($300) the car runs better, but I think cleaning the old one with a brake cleaner ($5) would have done the same thing. ![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
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#8
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Thanks! The darn light came back on as i pulled in my drive. A 15 mile drive from work.I will give it a cleaning and see what happens.
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I'm finally going to get time work on it Monday. I've never even seen the engine. To access the engine can I just remove the passenger seat, or do both seats need to come out?
#12
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Originally Posted by slider172
I'm finally going to get time work on it Monday. I've never even seen the engine. To access the engine can I just remove the passenger seat, or do both seats need to come out?