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ANother Key Fob problem

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Original source
4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHANother Key Fob problem

Reported or suspected cause

frequency of your fob 2 may have drifted slightly

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
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 suspect a cause
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.

Suspected cause

I suspect the frequency of your fob 2 may have drifted slightly so it's no longer transmitting within the correct frequency range, old garage door opener remotes can do that, I had tweaked the frequency adjustment inside on those many years ago, may not be as easy these days for a car remote fob.

Original post Read captured discussion
ANother Key Fob problem
Frequently discussed work

Replace /reprogram the #2 key

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

Does anybody have any other tricks or am I simply going to have to replace/reprogram the #2 key?

Original post Read captured discussion
ANother Key Fob problem
Read full discussion summary

Leading evidence: 'frequency of your fob 2 may have drifted slightly' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'frequency of your fob 2 may have drifted slightly' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace /reprogram the #2 key' (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 · 4 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Replace /reprogram the #2 key

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

Does anybody have any other tricks or am I simply going to have to replace/reprogram the #2 key?

Original post Read captured discussion
ANother Key Fob problem

Use #1 key

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

Keep it as a spare and just use the #1 key.

Original post Read captured discussion
ANother Key Fob problem
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 /reprogram the #2 key

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

Does anybody have any other tricks or am I simply going to have to replace/reprogram the #2 key?

Original post Read captured discussion
ANother Key Fob problem

Use #1 key

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

Keep it as a spare and just use the #1 key.

Original post Read captured discussion
ANother Key Fob problem
Reported and suspected causes (1)

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

frequency of your fob 2 may have drifted slightly

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.

Suspected cause

I suspect the frequency of your fob 2 may have drifted slightly so it's no longer transmitting within the correct frequency range, old garage door opener remotes can do that, I had tweaked the frequency adjustment inside on those many years ago, may not be as easy these days for a car remote fob.

Original post Read captured discussion
ANother Key Fob problem
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.

4 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: 20261027T013556Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I recently acquired a '03 C4S and got both keys. Both keys start the car without problems. #1 works fine when the lock/unlock button is depressed(LED flashes and the car does what it should) #2 initially had a very faint glow but then disappeared. I replaced the battery and the LED now flashes the same as the other(quickly for the lock/unlock, intermittent quick for trunk) BUT it still does not have an effect on the immobilizer I have read a few forums that suggested holding button in within 6 seconds of turning car off. Another said to reverse polarity on the battery for 10 seconds and then correct. Neither of these "tips" have helped. I did have 2 instances where the #2 key unlocked the car(even moved the seats and mirrors) and unlocked the trunk but was not able to duplicate again. Does anybody have any other tricks or am I simply going to have to replace/reprogram the #2 key?

POST 2Original post

Sounds like the #2 key is bad... Keep it as a spare and just use the #1 key.

POST 3Original post

You mentioned "immobilizer", which is the RF-ID "pill" in the key fob to allow engine to be started, so I think you really meant the alarm system and the door lock/unlock. I suspect the frequency of your fob 2 may have drifted slightly so it's no longer transmitting within the correct frequency range, old garage door opener remotes can do that, I had tweaked the frequency adjustment inside on those many years ago, may not be as easy these days for a car remote fob. A new key comes with a tag with some specific set of numbers which the dealer will need to program the fob with, so there is no way to re-program your existing fob #2 unless you have the tag for it.

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