9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCEL code help - P1126, P1133, P0102
Reported repair
Clean mass air flow sensor
Reported resolution
1
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report a fix
1
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported fix
Since it appeared the MAF was the issue I pulled the MAF out and cleaned it using CRC MAF cleaner and the codes have not returned after about 800 miles.
Leading evidence: 'Clean mass air flow sensor' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, The most frequently discussed action is 'Clean mass air flow sensor' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Clean mass air flow sensor', supported by resolution reports in 1 discussions. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
the p0102 tells me that cleaning the maf probaly isnt going to cut it and your likely going to need a new one.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I then disconnected the MAF to see if that was the issue and the car seemed to run better, indicating that the MAF was likely malfunctioning.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I'll replace the MAF eventually but since this is working, I'll leave it for now.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I then disconnected the MAF to see if that was the issue and the car seemed to run better, indicating that the MAF was likely malfunctioning.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Clean mass air flow sensor
1
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report a fix
1
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported fix
Since it appeared the MAF was the issue I pulled the MAF out and cleaned it using CRC MAF cleaner and the codes have not returned after about 800 miles.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Clean mass air flow sensor
1
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report a fix
1
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported fix
Since it appeared the MAF was the issue I pulled the MAF out and cleaned it using CRC MAF cleaner and the codes have not returned after about 800 miles.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
I recently had a similar issue on my 996 turbo and this is the first thread that came up after a google search for the p1133 and p1126 codes so I figured I'd respond with how I resolved my issue for others future reference.
UPS had the code reader waiting for me when I got home, so now I have a bit more information.
Information at idle:
Adaption, range 2 (FRA), bank 1: 1.30%
Mass air flow: 21.3 kg/h
Fault codes:
P1126 - Factory Fault Code 356 - O2 sensing adaptation, lower load range, bank 1
P1133 - Factory Fault Code 358 - O2 sensing adaptation, lower load range, bank 2
P0102 - Factory Fault code 115 - Mass Airflow Sensor. Below Limit
I have not reset the light yet, and could pull more information. It is a 2001 996 C4 with about 40k miles. Time to clean the Mass Airflow Sensor?
Another bit of information - the PSM turned off and the ABS lights came on the day before. The next time I started the car, both were normal - but the CEL came on.
Pulled a bit more information. Do you know what the 'normal' ranges for these are?
Adaption, range 2 (FRA), bank 1: 1.29%
Adaption, range 2 (FRA), bank 2: 1.30%
Adaption, range 1(RKAT), bank 1: -1.78
Adaption, range 1(RKAT), bank 2: -1.64
Mass air flow sensor: 1.37V
Mass air flow (MAF): 19kg/h
Mass air flow: 20.1kg/h
O2 sensing, bank 1: .97%
O2 sensor voltage ahead of cat. conv., bank 1: .64
O2 sensor voltage behind cat. conv., bank 1: .76
fra should be aprox 1.0
rkat should be 0.0 being that they are - it shows that the engine is running rich
and pulling fuel
maf voltage is actualy about right, your looking for voltage of 1.1 with the car off and 1.4 with the car at idle after the air pump has shut off
really the kg isnt that far off either its on the higher side of normal but not out side of normal
the p0102 tells me that cleaning the maf probaly isnt going to cut it and your likely going to need a new one.
I would recomoned trying to clean it, spray liberaly with electronics cleaner and let it dry complety before you reinstall, but i do think you going to have get a new one
I recently had a similar issue on my 996 turbo and this is the first thread that came up after a google search for the p1133 and p1126 codes so I figured I'd respond with how I resolved my issue for others future reference. I only had the P1133 and P1126 codes. I first cleared the codes and they came back within a few drive cycles. I then disconnected the MAF to see if that was the issue and the car seemed to run better, indicating that the MAF was likely malfunctioning. Be aware that your PSM and ABS lights will come on when the MAF is unplugged but will turn off after 2 drive cycles with the MAF plugged back in. Since it appeared the MAF was the issue I pulled the MAF out and cleaned it using CRC MAF cleaner and the codes have not returned after about 800 miles. I'll replace the MAF eventually but since this is working, I'll leave it for now. Hope this helps someone out
This is a source reference. Confirm exact model applicability in the original material.
