fullymatted.
Back to search
986Forum

Air Intake -40 Degrees - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Add to repair workspace
Open repair workspace
Original source
8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHAir Intake -40 Degrees - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Run search in here

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 · Original poster

I ran a search in here and on Google with no results.

Original post Read captured discussion
Air Intake -40 Degrees - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary

Leading evidence: 'Run search in here' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run search in here' (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.

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

Read captured replies

1 matching discussions · 8 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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

Run search in here

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 · Original poster

I ran a search in here and on Google with no results.

Original post Read captured discussion
Air Intake -40 Degrees - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.

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

  • 986Forum: 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: 20261027T003124Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hey Everyone, I have a 99 Porsche Boxster with 64K miles. The performance has gotten pretty bad, and the check engine light came on, so I took her to a mechanic someone recommended. They said the mass airflow sensor is reading -40, the mechanic hooked up a new one (Bosch), and the temp was still -40. There was also a code that coil 3 misfired. I am guessing the two are related (maybe the low temperature reading is causing her to run rich). But if it is not the MAS, I am stumped. I ran a search in here and on Google with no results. Anyone seen this before? Thanks, Jonny

POST 2Original post

i'll take a stab. there is an iat (intake air temperature) sensor that plugs in to the intake manifold. this is where the computer gets it's air temp info from. if it is unplugged, shorted to ground, covered in goo, or just failed, it might be sending a signal so far out of whack that the computer is just defaulting to a minimum value (-40). the iat sensor is #17 on the diagram below: Intake Distributor

POST 3Original post

Quotes source post: 485293

Hate to have to correct you, but that is the engine compartment temperature sensor; the intake air temp signal comes from the MAF.

POST 6Original post

While were talking mafs mine threw a code a few days ago. P0102. I cleared it. Waiting to see if it returns. I have`nt cleaned it in the almost 3 yrs that I`ve had it. I started to source a new one did`nt know the price. Why is there such a swing in the price of them ? I know dealer is well. But online from $ 50 to $600. WTH ?

POST 7 / ORIGINAL POSTEROriginal post

The mechanic hooked up a new Bosch MAF, and said the readout was still -40. I cleaned it and cleared it, and it just came right back. Anyone know where I would start for the wiring? Thanks, Jonny

POST 8 / ORIGINAL POSTEROriginal post

Quotes source post: 485388

Yea, I noticed the crazy price range online too. $250 from Bosche, $500 from Porsche, or $50 from China... Let me know how it goes if you pop one in. Thanks, Jonny

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