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EPBL_a248

a Alert

Code EPBL_a248 was reported by the “Parking brake — left” controller in the car. The letter “a” in the middle places it among entries of the alert type.

Area of the car
Parking brake — left
Severity
Alert
Sequence number
248

5 comments →

What code EPBL_a248 means

The left caliper of the electric parking brake. The codes mean the same as the EPB group.

Severity — a

The most common type. The car logged the event and may have shown it on the screen. The range is wide — from something trivial that clears itself to something that needs attention.

Internal alert name

This is how the fault is named inside the car's firmware. For codes without a description it is the most precise clue there is — the name itself says what the event is about.

EPBL_a248_csmDynamicApplyFailed

Description from the service documentation

The text below comes from Tesla's technical documentation. We leave it in the original English so that translation cannot shift its meaning.

Electronic Parking Brake apply was interrupted during dynamic apply. Apply failed.

Electronic Parking Brake faulted while applying and during ESM_DYNAMIC

Electronic Parking Brake could not be applied, car may be free rolling

Non-nominal termination of external park

Motor current was higher than expected.

Motor current measurement, with calibration offset subtracted, was higher than 17 amps.

Voltage drop on input power is high

Electronic Parking Brake is performing dynamic apply

One or more of the expected CAN messages from TAS were not received.

A message the local ECU expects to receive from the TAS ECU hasn't been received within the expected timeout or the drop rate is too high while the TAS is CAN active. The ECU is considered CAN active when VCFRONT_vehGoToSleep is 0.

All messages the local ECU expects to receive from the TAS ECU are being received or the TAS ECU is CAN inactive.

Air suspension functionality may be missing.

VCLEFT/VCRIGHT: Estimated resistance exceeds 500mOhm when input current is under 15A and exceeds 50mOhm when input current is over 15A. (VC-6540); VCFRONT: Estimated resistance exceeds 100mOhm when input current from PCS is under 10A and exceeds 20mOhm when input current is over 10A.

VCLEFT/VCRIGHT: Estimated resistance is less than 500mOhm when input current is under 15A and is less than 50mOhm when input current is over 15A. (VC-6540); VCFRONT: Estimated resistance is less than 100mOhm when input current from PCS is under 10A and is less than 20mOhm when input current is over 10A.

May result in vehicle becoming inoperable. Note: Service should ignore this alert on VCFRONT for the time being.

Road grade is too steep to secure with Park Brake

Car is parked on a road grade too steep to park; car parked on grade >30% or car with brembo Electronic Parking Brake parked on grade >27% and temperature less than -25degC

Electronic Parking Brake not parked

Car may not be secured by Electronic Parking Brake on the current road grade, may be free rolling

One or more of the expected CAN messages required from DI when not in drive mode were not received.

Driver experiences with code EPBL_a248

This part is written by you. If you have had code EPBL_a248, tell us when it appeared, what brought it on and how it ended — for the next person, one such sentence is often worth more than the entire service documentation.

TesListCS
Na displeji se objeví „Emergency brake not applied“ a Tesla u tohohle kódu píše větu, kterou nelze přejít: vůz se může volně rozjet. Co se stalo: zatahování levé elektrické parkovací brzdy bylo přerušeno během dynamického zatahování a selhalo. Brzda se tedy zatahovat začala, něco ji uprostřed zastavilo a k cíli nedošla. Co je dynamické zatahování: parkovací brzda se u Tesly nezatahuje jen za klidu. Když je potřeba zabrzdit ještě za pohybu — třeba při nouzovém zabrzdění nebo když vůz zjistí, že se rozjíždí bez řidiče — sevře třmeny v pohybu. To je jiný a náročnější režim než běžné zaparkování a hlídá se zvlášť. Proč se to nedokončilo: Tesla mezi podmínkami uvádí například proud motorku brzdy vyšší, než se čekalo, nebo velký propad napětí na napájení. Obojí ukazuje na to, že mechanismus kladl větší odpor, než měl, nebo že mu chyběl proud na dotažení. Proč to nesmíte podcenit: mezistav je nejhorší možný. Brzda není rozepnutá ani zatažená a nedá se spoléhat, že vůz udrží. Ve svahu to znamená přesně to, co Tesla píše. Co s tím: zajistěte vůz jinak — zatočená kola k obrubníku, rovina, případně klín. Nespoléhejte na to, že to napodruhé chytne. Objednejte servis co nejdřív. Hlásí ho Model 3, Model S 2021+, Model X 2021+ a Model Y.
TesListSK
Na displeji sa objaví „Emergency brake not applied“ a Tesla pri tomto kóde píše vetu, ktorú nemožno prejsť: vozidlo sa môže voľne rozbehnúť. Čo sa stalo: zaťahovanie ľavej elektrickej parkovacej brzdy bolo prerušené počas dynamického zaťahovania a zlyhalo. Brzda sa teda zaťahovať začala, niečo ju uprostred zastavilo a k cieľu nedošla. Čo je dynamické zaťahovanie: parkovacia brzda sa pri Tesle nezaťahuje len za pokoja. Keď je potrebné zabrzdiť ešte za pohybu — napríklad pri núdzovom zabrzdení alebo keď vozidlo zistí, že sa rozbieha bez vodiča — zovrie strmene v pohybe. To je iný a náročnejší režim než bežné zaparkovanie a stráži sa zvlášť. Prečo sa to nedokončilo: Tesla medzi podmienkami uvádza napríklad prúd motorčeka brzdy vyšší, než sa čakalo, alebo veľký prepad napätia na napájaní. Oboje ukazuje na to, že mechanizmus kládol väčší odpor, než mal, alebo že mu chýbal prúd na dotiahnutie. Prečo to nesmiete podceniť: medzistav je najhorší možný. Brzda nie je rozopnutá ani zatiahnutá a nedá sa spoliehať, že vozidlo udrží. Vo svahu to znamená presne to, čo Tesla píše. Čo s tým: zaistite vozidlo inak — zatočené kolesá k obrubníku, rovina, prípadne klin. Nespoliehajte sa na to, že to na druhýkrát chytí. Objednajte servis čo najskôr. Hlási ho Model 3, Model S 2021+, Model X 2021+ a Model Y.
TesListDE
Im Display erscheint „Emergency brake not applied“ und Tesla schreibt zu diesem Code einen Satz, den man nicht übergehen kann: Das Fahrzeug kann frei wegrollen. Was passiert ist: Das Anlegen der linken elektrischen Feststellbremse wurde während des dynamischen Anlegens unterbrochen und schlug fehl. Die Bremse hat also begonnen anzulegen, etwas hat sie mittendrin gestoppt, und sie kam nicht ans Ziel. Was dynamisches Anlegen ist: Die Feststellbremse legt bei Tesla nicht nur im Stillstand an. Wenn noch in Bewegung gebremst werden muss — etwa bei einer Notbremsung oder wenn das Fahrzeug feststellt, dass es ohne Fahrer wegrollt — spannt sie die Sättel in der Bewegung. Das ist ein anderer und anspruchsvollerer Modus als das gewöhnliche Parken und wird eigens überwacht. Warum es nicht zu Ende kam: Tesla nennt unter den Bedingungen etwa einen höheren Bremsmotorstrom als erwartet oder einen großen Spannungseinbruch auf der Versorgung. Beides deutet darauf hin, dass der Mechanismus mehr Widerstand leistete als vorgesehen oder dass ihm der Strom zum Nachziehen fehlte. Warum Sie das nicht unterschätzen dürfen: Der Zwischenzustand ist der schlechtestmögliche. Die Bremse ist weder gelöst noch angelegt, und man kann sich nicht darauf verlassen, dass sie das Fahrzeug hält. Am Hang bedeutet das genau das, was Tesla schreibt. Was tun: Sichern Sie das Fahrzeug anders — Räder zum Bordstein eingeschlagen, ebener Untergrund, gegebenenfalls ein Keil. Verlassen Sie sich nicht darauf, dass es im zweiten Anlauf greift. Vereinbaren Sie schnellstmöglich einen Werkstatttermin. Gemeldet von Model 3, Model S 2021+, Model X 2021+ und Model Y.
TesListPL
Na ekranie pojawia się „Emergency brake not applied” i Tesla przy tym kodzie pisze zdanie, którego nie da się pominąć: auto może swobodnie się stoczyć. Co się stało: zaciąganie lewego elektrycznego hamulca postojowego zostało przerwane w trakcie zaciągania dynamicznego i nie powiodło się. Hamulec zaczął się więc zaciągać, coś zatrzymało go w połowie i do celu nie dotarł. Czym jest zaciąganie dynamiczne: hamulec postojowy w Tesli nie zaciąga się tylko na postoju. Gdy trzeba zahamować jeszcze w ruchu — na przykład przy hamowaniu awaryjnym albo gdy auto wykryje, że stacza się bez kierowcy — zaciska zaciski w ruchu. To inny i trudniejszy tryb niż zwykłe parkowanie i pilnowany jest osobno. Dlaczego się nie dokończyło: Tesla wśród warunków podaje na przykład prąd silniczka hamulca wyższy niż oczekiwany albo duży spadek napięcia na zasilaniu. Oba wskazują na to, że mechanizm stawiał większy opór, niż powinien, albo że zabrakło mu prądu do dociągnięcia. Dlaczego nie wolno tego lekceważyć: stan pośredni jest najgorszy z możliwych. Hamulec nie jest ani zwolniony, ani zaciągnięty i nie można liczyć, że auto utrzyma. Na wzniesieniu znaczy to dokładnie to, co Tesla pisze. Co z tym zrobić: zabezpiecz auto inaczej — skręcone koła do krawężnika, równy teren, ewentualnie klin. Nie licz na to, że za drugim razem chwyci. Umów serwis jak najszybciej. Zgłaszają go Model 3, Model S 2021+, Model X 2021+ i Model Y.
TesList
The screen shows “Emergency brake not applied” and for this code Tesla writes a sentence you cannot skip past: the car may be free rolling. What happened: the left electronic parking brake's apply was interrupted during a dynamic apply and failed. So the brake started to apply, something stopped it midway, and it never got there. What a dynamic apply is: on a Tesla the parking brake does not only apply at a standstill. When braking is needed while still moving — during an emergency stop, say, or when the car detects it is rolling away without a driver — it clamps the calipers on the move. That is a different and more demanding mode than ordinary parking, and it is monitored separately. Why it did not finish: among the conditions Tesla lists a brake motor current higher than expected, or a large voltage drop on the input power. Both point to the mechanism offering more resistance than it should, or to there not being enough current to pull it home. Why you must not underestimate this: the halfway state is the worst possible. The brake is neither released nor applied, and it cannot be relied on to hold the car. On a slope that means exactly what Tesla writes. What to do: secure the car another way — wheels turned into the kerb, level ground, a chock if you have one. Do not count on it grabbing at the second attempt. Book service as soon as you can. Reported by Model 3, Model S 2021+, Model X 2021+ and Model Y.

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What to do about it

01

Write down the whole code

Copy it exactly, letter and number included. Photographing the screen is safest — codes often differ by a single digit, and mixing them up leads somewhere else entirely.

02

Try letting the car sleep and wake

Some codes clear after a screen restart or after the car sits locked for a few hours. If the code does not come back, it was usually a one-off glitch.

03

Watch whether it repeats

A one-off entry and a code that appears after every drive are two different things. It helps a service centre enormously if you know exactly when it shows up.

04

Do not wait on safety systems

With airbags, brakes, steering and high voltage there is no point waiting it out. With the other groups you can watch and see whether the code returns at all.

Before you act on a code. This page is a reference dictionary, not a repair manual. It explains what an abbreviation means and what it relates to — it does not diagnose your car. The same code can have different causes, and its meaning also shifts between firmware versions. For anything involving brakes, steering, airbags or high voltage, go straight to a service centre.

Other codes from the same part of the car

EPBL_a247Parking brake — leftcsm Dynamic Apply Retrya Alert EPBL_a249Parking brake — leftidle Fault Releasea Alert EPBL_a246Parking brake — leftidle Fault Applya Alert EPBL_a250Parking brake — leftWinch Mode Canceleda Alert EPBL_a245Parking brake — leftservice Mode Activea Alert EPBL_a251Parking brake — leftcurrent Variance Higha Alert EPBL_a244Parking brake — leftWinch Mode Activea Alert EPBL_a252Parking brake — leftwinch Mode Pendinga Alert

Show all 123 codes in the EPBL group →

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