11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHP2135 and p0121 code
Leading reported evidence
Clean mass air flow sensor
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed · Original poster
So far I have cleaned throttle body and set adaptation, cleaned maf...
Leading evidence: 'Clean mass air flow sensor' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean mass air flow sensor' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed · Original poster
So far I have cleaned throttle body and set adaptation, cleaned maf...
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 performed work without a confirmed outcome
1
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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
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Suggestion
Clean the throttle body out with electrical cleaner then do the throttle adaption.
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
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Suggestion · Original poster
Well found the problem, for those of you who experience a p0050 and p0155 02 code and p2135 and p0121 be sure to inspect o2 itself to find harness was shorting out causing limp mode on throttle.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Suggestion · Original poster
Well found the problem, for those of you who experience a p0050 and p0155 02 code and p2135 and p0121 be sure to inspect o2 itself to find harness was shorting out causing limp mode on throttle.
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 · Original poster
i have a dilema on a 2001 Porsche 996 turbo, running GT660 EVOMS tune with 1050x injectors, K16 billet turbos, Hitachi Mass Air, Catless Exhaust, intake tubes off Turbos.
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.
11 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.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello Rennlisters,
i have a dilema on a 2001 Porsche 996 turbo, running GT660 EVOMS tune with 1050x injectors, K16 billet turbos, Hitachi Mass Air, Catless Exhaust, intake tubes off Turbos.
Car has been pulling codes P2135 and P0121, thought it was Pedal Potentiometer, so had it replaced. Drove home and it still comes back. Not that this is related, but I am also getting codes P0051 and P0151 as well regarding o2 sensor area. Pedal will go into limp mode and open 30 pct on wide open throttle.
Has anyone experienced this, iif so how did you resolve it?
Thanks,
Steve
Maf�s are a normal wear item and when faulty can cause all kinds of issues even unrelated. I�d narrow it down by throttle body, maf, and battery etc. All are free to check and will help eliminate having to throw parts at the problem.
Thanks for your response. So far I have cleaned throttle body and set adaptation, cleaned maf... and replaced pedal potentiometer. I am curious if the code is related to the o2 sensor code p0050 and p0155 telling me to replace it. If you clear the codes, immediately o2 code comes back, then after some driving check engine light for 02 comes on then lastly
limp mode code p2135 and p0121 show.
Steve
Thanks Atrox. I did replace pedal potentiometer, and code returns. I am leaning toward bad gas pedal iteself or o2 sensor causing limp mode triggering code
simultaneously. What do you think?
Well found the problem, for those of you who experience a p0050 and p0155 02 code and p2135 and p0121 be sure to inspect o2 itself to find harness was shorting out causing limp mode on throttle.
Hope this helps others with the limp mode.
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