PARK family
PARK_a004_s1_blocked
Not Available
What does the PARK_a004_s1_blocked alert mean?
This error is detected by the ECU. Sensor dirt can be detected through any or all of these methods 1. high attenuation time 2. constant echos when vehicle is in motion . 3. low attenuation time 4. jittering attenuation time.
What you'll see in your Tesla
- Not Available
What triggers it
Five consequitive samples of blockage condition being set.
When it clears
Blockage condition is no longer present (no power cycle required)
Potential impact
Sensor function will be impaired, park assist features will be disabled.
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Semitruck
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Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.