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Planet-9

Persistent P0121 code causing limp mode 2007 Boxster S

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Original source
3 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHPersistent P0121 code causing limp mode 2007 Boxster S

Leading reported evidence

Replace batteries out

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
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 performed work without a confirmed outcome
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.

Performed · outcome unconfirmed

I ran it on a different battery a while back and it was fine and I think the issue came about when I swapped the batteries out.

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S
Frequently discussed work

Clean maf sensor and throttle body

No successful repair reported for this finding.

0
Reported fixes
1
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report an unsuccessful attempt
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.

Unsuccessful attempt

So far, I have replaced my gas pedal assembly, cleaned my MAF sensor and throttle body with no success.

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S

Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.

Read full discussion summary

Leading evidence: 'Replace batteries out' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean maf sensor and throttle body' (1 discussions). For that action, 0 discussions report a resolution and 1 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.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 3 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Replace maf sensor and throttle body

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
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 performed work without a confirmed outcome
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.

Performed · outcome unconfirmed

My MAF sensor and Throttle body have been replaced 30k miles ago and I have been driving the car for about 10k miles with no issues.

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S

Clean when i took them out

Suggestion or failed attempt

No successful repair reported for this finding.

0
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 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

Both were fairly clean when I took them out.

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S

Disconnect battery

Suggestion or failed attempt

No successful repair reported for this finding.

0
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 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

plan is to disconnect the battery for a little bit to reset the

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S

Clean maf sensor and throttle body

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
1
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 an unsuccessful attempt
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.

Unsuccessful attempt

So far, I have replaced my gas pedal assembly, cleaned my MAF sensor and throttle body with no success.

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S

Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.

Frequently discussed actions (6)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Clean maf sensor and throttle body

No successful repair reported for this finding.

0
Reported fixes
1
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report an unsuccessful attempt
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.

Unsuccessful attempt

So far, I have replaced my gas pedal assembly, cleaned my MAF sensor and throttle body with no success.

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S

Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.

Clean when i took them out

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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

Both were fairly clean when I took them out.

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S

Disconnect battery

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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

plan is to disconnect the battery for a little bit to reset the

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S

Replace batteries out

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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.

Performed · outcome unconfirmed

I ran it on a different battery a while back and it was fine and I think the issue came about when I swapped the batteries out.

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S

Replace gas pedal assembly

No successful repair reported for this finding.

0
Reported fixes
1
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report an unsuccessful attempt
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.

Unsuccessful attempt

So far, I have replaced my gas pedal assembly, cleaned my MAF sensor and throttle body with no success.

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S

Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.

Replace maf sensor and throttle body

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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.

Performed · outcome unconfirmed

My MAF sensor and Throttle body have been replaced 30k miles ago and I have been driving the car for about 10k miles with no issues.

Original post Read captured discussion
Persistent P0121 code causing limp mode 2007 Boxster S
Coverage and how to read this overview

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.

3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Planet-9: 1 discussions

0 evidence records excluded for query context · 1 excluded by outcome qualification · 2 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T150039Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Hello everyone, Recently I have encountered a persistent P0121 error on my car which my scanner lists as an accelerator potentiometer out of range code and the car has very sluggish acceleration. I connected my foxwell and read that my max throttle angle at this point only opens to about 17% and it looks like my car is only going up 1 mile per second when I am flat out. So far, I have replaced my gas pedal assembly, cleaned my MAF sensor and throttle body with no success. My next plan is to disconnect the battery for a little bit to reset the DME so I can recalibrate the pedal again. I will also look into my fusebox and see if there are any issues there or any loose relays as I was poking in there shortly before I had this issue. Has anyone else seen an issue like this before? Sometimes it comes and goes when I restart my car but it has been more frequent as of recently. There are some times when the issue disappears for a time but just returns out of nowhere. I did look at the throttle angle position sensor and noticed that sometimes the throttle hits 100.3-101%. I don’t know if this is causing the issue or not but I don’t know if that reading is okay or not. My MAF sensor and Throttle body have been replaced 30k miles ago and I have been driving the car for about 10k miles with no issues. Both were fairly clean when I took them out. Please help me.

POST 2Original post

Could be an electrical issue. For starters, how old is the battery? Even if there's no problem starting, failing batteries can cause all kinds of weird symptoms.

POST 3Original post

The battery is almost reaching its lifespan for the warranty to expire. I ran it on a different battery a while back and it was fine and I think the issue came about when I swapped the batteries out. I think I should try the different battery though just to test

This is a source reference. Confirm exact model applicability in the original material.