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CEL OBD II Tester code P0134

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCEL OBD II Tester code P0134

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

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
Thinking it was a MAF issue, I have alredy cleaned the MAF.
Original post Read captured discussion
CEL OBD II Tester code P0134

Read full discussion summary

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.

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

Read captured replies

1 matching discussions · 2 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Disconnect battery

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
Is that what it means, or is it because I did the test on a cold car after disconnecting the battery for something entirely different.
Original post Read captured discussion
CEL OBD II Tester code P0134

Test on a cold car

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
Is that what it means, or is it because I did the test on a cold car after disconnecting the battery for something entirely different.
Original post Read captured discussion
CEL OBD II Tester code P0134

Frequently discussed actions (3)

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

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
Thinking it was a MAF issue, I have alredy cleaned the MAF.
Original post Read captured discussion
CEL OBD II Tester code P0134

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 · Original poster
Is that what it means, or is it because I did the test on a cold car after disconnecting the battery for something entirely different.
Original post Read captured discussion
CEL OBD II Tester code P0134

Test on a cold car

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
Is that what it means, or is it because I did the test on a cold car after disconnecting the battery for something entirely different.
Original post Read captured discussion
CEL OBD II Tester code P0134

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.

2 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

POST 1 / ORIGINAL POSTEROriginal post

After CEL came on last week, I went out and got an EQUUS 3100 tester. After some difficulty gettting the tester to work, I got the final code P0134 Cross-Referencing with the Code Booklet: P0134 = O2 Sensor Circuit No Activity Detected (Bank1 Sensor 1) All of my CEL issues started after I had a short sliding my radio head-unit into the dash, could I have popped the O2 sensor fuse? Is that what it means, or is it because I did the test on a cold car after disconnecting the battery for something entirely different. Thinking it was a MAF issue, I have alredy cleaned the MAF. Thanks so much for any help you can offer, Scott

POST 2Original post

P0134 indicates that the DME unit does not "see" any voltage from the left side (bank 1) front O2 sensor. With your scanner, you should be able to read the O2 sensor voltages, all four of them. All four of the O2 sensors are powered from a common O2 relay and fuse 4, fuse holder "C". Your problem is not the MAF if the other 3 O2 sensors read O.K. You may have a short in the O2 signal wire to the DME unit or a bad O2 sensor.

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