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PCM 3.0 - not keeping time and date is wrong

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6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

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YOUR RESEARCHPCM 3.0 - not keeping time and date is wrong

Leading reported evidence

Check car around

Suggestion or failed attempt

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Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

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Suggestion
My car is 2009 (MY10) so need a check a car around that time.
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PCM 3.0 - not keeping time and date is wrong

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

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1 matching discussions · 6 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Replace time

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Suggestion
Change the time setting to manual instead of GPS time.
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PCM 3.0 - not keeping time and date is wrong

Reset itself

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Suggestion
date has reset itself to 01.01.2007.
Original post Read captured discussion
PCM 3.0 - not keeping time and date is wrong

Reset time many times and is still losing minutes

Suggestion or failed attempt

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Unsuccessful attempts: 1
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Suggestion
, I’ve reset the time many times and is still losing minutes.
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PCM 3.0 - not keeping time and date is wrong

Set by

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Discussions that contain suggestions: 1

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Suggestion
My vehicle has Sat Nav so the date is set by
Original post Read captured discussion
PCM 3.0 - not keeping time and date is wrong

Frequently discussed actions (7)

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

Check car around

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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
My car is 2009 (MY10) so need a check a car around that time.
Original post Read captured discussion
PCM 3.0 - not keeping time and date is wrong

Replace time

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
Change the time setting to manual instead of GPS time.
Original post Read captured discussion
PCM 3.0 - not keeping time and date is wrong

Reset itself

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
date has reset itself to 01.01.2007.
Original post Read captured discussion
PCM 3.0 - not keeping time and date is wrong

Reset time many times and is still losing minutes

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
, I’ve reset the time many times and is still losing minutes.
Original post Read captured discussion
PCM 3.0 - not keeping time and date is wrong

Set by

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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
My vehicle has Sat Nav so the date is set by
Original post Read captured discussion
PCM 3.0 - not keeping time and date is wrong

Set somewhere

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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.

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Suggestion
connection to update a setting somewhere??
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PCM 3.0 - not keeping time and date is wrong

Use 13-digit counter

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Discussions that contain suggestions: 1

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Suggestion
Newer GPS systems and satellites use a 13-digit counter that is
Original post Read captured discussion
PCM 3.0 - not keeping time and date is wrong

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.

Planet-9: 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: 20261026T130754Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Today I noticed that my date on my PCM 3.0 in my 987.2 is pointing to May 2025 and the time is erratic. My vehicle has Sat Nav so the date is set by GPS , I’ve reset the time many times and is still losing minutes. I’ve performed a hard reboot, but still have the same issue. My only thoughts is perhaps the battery is failing, though I keep it on a ctek charger . The battery is coming up to 4 years old Jan 2026. I searched various forums and nothing that points to the problem. Has anyone else experienced this issue?

POST 2Original post

Wait, May? 1.21 Gigawatts ! It’s commonly known that crazy behavior at that battery age means buying a new battery that you’re near to needing anyhow is the proper starting point and since you can do it with that car easily, it’s cheap insurance.

POST 3Original post

same issue - just started in last month. assume PCM is now incompatible with satellite time/date signal. I'd like to disable auto update of date/time in PCM but can't see where it can be done in the menus ... so might be a PWIS connection to update a setting somewhere??

POST 4Original post

Below From Dec 2019 referring to PCM2.1 .. I guess it has rolled over a digit and now affects PCM3.0 Condition In older vehicles, the date and time generated by GPS are not correct. Technical Background Older GPS systems (such as those used on PCM2.1) and satellites represent the date and time as a 10-digit counter. This counter increments to a maximum of 1024 weeks, or about 19.7 years, then it resets, or “rolls over”, back to zero and starts counting again. This rollover occurred on April 6, 2019. Newer GPS systems and satellites use a 13-digit counter that is accurate for a longer period. This conflict between systems and satellites creates a condition where, since April of 2019, the PCM may not display an accurate date and time. It is not possible to manually select which satellite the PCM uses. Service Information Change the time setting to manual instead of GPS time. This is the only way to get the correct time and date for these cars.

POST 5Original post

Ok, so a new battery seems to have solved the random clock resets - I also unticked DST box as this may have contributed to it. However, the PCM date has reset itself to 01.01.2007. The units are manufactured by Hartman/Becker and seem to have the 10 bit chips sets so we have the date rollover issue. Can anyone with a PCM 3.0 with Nav confirm? My car is 2009 (MY10) so need a check a car around that time.

POST 6Original post

This PCM date issue seems to have popped up here several times. Here's a link to a discussion if this issue but there was no resolution posted https://www.planet-9.com/threads/pcm-date-lost-in-2011-boxster.258954/?post_id=2254993#post-2254993

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