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Translation help please: CEL - OBD Code P0442

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6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHTranslation help please: CEL - OBD Code P0442

Leading reported evidence

Use actron cp-9135 code reader and got p0442

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 got a check engine light on my 1999 C2 Cab, so I used an Actron CP-9135 code reader and got P0442, which the code reader translates as "Emission Control System leak (small)."
Original post Read captured discussion
Translation help please: CEL - OBD Code P0442

Frequently discussed work

Tighten approach

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 · Original poster
Maurice, I'll try the clear and tighten approach.
Original post Read captured discussion
Translation help please: CEL - OBD Code P0442

Read full discussion summary

Leading evidence: 'Use actron cp-9135 code reader and got p0442' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Tighten approach' (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 · 6 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Tighten approach

Suggestion or failed attempt

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 · Original poster
Maurice, I'll try the clear and tighten approach.
Original post Read captured discussion
Translation help please: CEL - OBD Code P0442

Frequently discussed actions (2)

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

Tighten approach

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 · Original poster
Maurice, I'll try the clear and tighten approach.
Original post Read captured discussion
Translation help please: CEL - OBD Code P0442

Use actron cp-9135 code reader and got p0442

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 got a check engine light on my 1999 C2 Cab, so I used an Actron CP-9135 code reader and got P0442, which the code reader translates as "Emission Control System leak (small)."
Original post Read captured discussion
Translation help please: CEL - OBD Code P0442

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.

6 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: 20261026T225432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I got a check engine light on my 1999 C2 Cab, so I used an Actron CP-9135 code reader and got P0442, which the code reader translates as "Emission Control System leak (small)." The handy code list on Renntech.org translates it as "P0442 Fuel Tank Ventilation System (Micro-leak) - Below Lower Limit." Is that OBD-II speak for a loose gas cap? Or could it be one of 100 things? Is it something I should stop driving for? Thanks, guys.

POST 2Original post

u can keep driving. sounds like a louse fuel tank cap.

POST 3Original post

could be a loose gas cap that is one thing that could casue that fault

POST 4Original post

My guess is either loosed gas cap, the seal on the cap is bad or the charcoal canister is bad.

POST 5Original post

I would erase it (the code) and carefully re apply the gas cap and see if it comes back on.

POST 6 / ORIGINAL POSTEROriginal post

Thanks, guys. Maurice, I'll try the clear and tighten approach. I intend to drive to Truro and back over the weekend, so that's a good test run. CP

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