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"Fault, differential lock" meaning?

 
Old 06-07-2019, 09:15 AM
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Manifold
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Default "Fault, differential lock" meaning?

Over the past several months, I've gotten a "Fault, differential lock" code in my 991.1 GT3 a few times. Each time, my shop was able to clear the code and the car behaved normally, but we don't know what's causing the code and what the implications are. Have any of you gotten this code? Any ideas about what's causing it and how to fix it? I'm getting the transmission fluid and filter changed, but I don't know if that will make any difference.

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Old 06-07-2019, 06:31 PM
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139 views, but no responses, makes me think that this is a relatively rare problem? The fault code started after the engine replacement, and we're wondering if it's related to that.
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Old 06-07-2019, 06:45 PM
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TRAKCAR
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Never seen or heard about this before..
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Old 06-07-2019, 07:12 PM
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MarcusG
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Me neither.

That's a totally new one!
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Old 06-07-2019, 10:51 PM
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ipse dixit
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The only time I've seen this is when playing with the PIWIS fault codes.
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Old 06-07-2019, 10:54 PM
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Never heard of this error , nor have I seen it discussed before.
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Old 06-07-2019, 11:16 PM
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Manifold
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We changed the transmission fluid and filter today. It should be straw colored, but it was black. But changing the fluid and filter didn't make the code go away, it's still intermittently coming on.

My shop is wondering if there's a problem with the PDK 'plug connections', resulting from when the new engine was installed (this code never came up prior to replacing the engine).
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Old 06-08-2019, 06:11 AM
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groundhog
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Check your rear tires........and or alignment
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Old 06-08-2019, 11:32 AM
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the shop should not just clear the code and hope it doesn't happen again. Dont they have the means to look up the code and run a prescribed troubleshooting guide on that code??
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Old 06-08-2019, 11:45 AM
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i head exactly same code once. Restart the car and luckily that message never came again.
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Old 06-08-2019, 06:03 PM
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Todd B
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I would check/reset and electrical connection that may have been touched during the engine replacement. Might want to use some cleaner on the contacts. Otherwise Porsche repair procedure on the PDK is to just replace the unit.
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Old 06-08-2019, 07:34 PM
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Manifold
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The fault code came on once today, and at other times it didn't. I tracked the car today and it drove fine, no difference in handling from before.

Thanks all for the suggestions. I'll follow up on them with the shop, and will report the findings in this thread.
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