- Engine / equipment
- Porsche 911 (992) with reversing camera or 360° view
- Period mentioned
- 2020–2026 (US model years)
- Symptoms
- Several driver assistance systems fail and white messages appear on the dashboard, such as "Assistance systems currently restricted" or "Lane Keep Assist currently not available". After switching the ignition off and on, everything works again.
- Possible cause described
- The driver assistance control unit (ZFAS) stores code C12D5FA. If it is passive, it may be electromagnetic interference on the video line; if it is active, a faulty contact of the image processor. Porsche describes it in its technical information 975/25.
- Check for the garage
- Ask the workshop to check whether code C12D5FA is active or passive: if passive, the ground connection of the windshield heating for the front sensors is reworked; if active, the ZFAS control unit is replaced.
- Cost cited in the source
- No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.
KNOWN FAULT · Porsche
White messages about unavailable driver assistance systems that go away after a restart (911 992)
Sources are not verified in real time and no entry confirms that your car is affected.
Has this happened to you?
Anonymous answer, no personal data.
Frequently asked questions
How much does it cost to repair this fault?
No verified estimate; ask the garage for a quote.
A rough figure from the original database, not an up-to-date quote.
Calculate estimateHow is it checked?
Ask the workshop to check whether code C12D5FA is active or passive: if passive, the ground connection of the windshield heating for the front sensors is reworked; if active, the ZFAS control unit is replaced.
What are the symptoms?
Several driver assistance systems fail and white messages appear on the dashboard, such as "Assistance systems currently restricted" or "Lane Keep Assist currently not available". After switching the ignition off and on, everything works again.
Which cars and years does it affect?
- Brands
- Porsche
- Engine / equipment
- Porsche 911 (992) with reversing camera or 360° view
- Period mentioned
- 2020–2026 (US model years)
Which fault codes appear?
Taking it to a garage?
Models with this entry
- Porsche 911 (992)2019–2026
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