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

Discussion summary

YOUR RESEARCHP0453 Help

Leading reported evidence

Test harness, plug side and removed

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 · Original poster

When I test the harness, plug side and removed from sensor, I get a 5v reference, 1ohm on the ground continuity, and 0.06v on the signal wire.

Original post Read captured discussion
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Frequently discussed work

Replace sensor

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 · Original poster

I started with the basic stuff - first I replaced the sensor. No change.

Original post Read captured discussion
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Read full discussion summary

Leading evidence: 'Test harness, plug side and removed' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace sensor' (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 · 2 captured posts examined · 1 partial discussions

Compare 1 other evidence results

Replace sensor

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 · Original poster

I started with the basic stuff - first I replaced the sensor. No change.

Original post Read captured discussion
P0453 Help
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.

Replace sensor

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 · Original poster

I started with the basic stuff - first I replaced the sensor. No change.

Original post Read captured discussion
P0453 Help

Test harness, plug side and removed

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

When I test the harness, plug side and removed from sensor, I get a 5v reference, 1ohm on the ground continuity, and 0.06v on the signal wire.

Original post Read captured discussion
P0453 Help
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.

  • 6SpeedOnline: 1 discussions

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

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

Outcome without a verified action link

No change.

Original post Read captured discussion

No unique explicit quoted action; no causal link assigned

Generation: 20261027T192637Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

'01 C4 Cab I've had a persistent p0453 code that I can't figure out. Specifically "Switch High" and not "Short to B+". Live data shows a 3.1kpa reading, which is basically maxed out. I started with the basic stuff - first I replaced the sensor. No change. I found a nick from a pinch point in all three wires to the plug and soldered them all back together. No change. Visually inspected all of the wires I can without taking apart all the bundles, found nothing. When I test the harness, plug side and removed from sensor, I get a 5v reference, 1ohm on the ground continuity, and 0.06v on the signal wire. That seems good and right, but If I instead ground the signal wire to the chassis and not the sensor ground, I get a steady 4v reading on the signal wire. That feels like maybe getting somewhere because that does correlate to the 3.1kpa ftp reading, but how and why could that be? And how do I get the damn light off The car has no symptoms or issues aside from the CEL and p0453

POST 2Original post

Ok... wire connection question number 2! This connection seems to be free-floating in my engine bay. It comes from the right side (passenger side) next to the MAF sensor connection. I can't seem to find where this connection plugs into. A photo is worth a thousands words (I think). THANKS much! ;o)

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