Left Body Controller — 100 ms Task Error
The TESLA-VCLEFT_a045 (VCLEFT) EV fault code means: Left Body Controller — 100 ms Task Error. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $0-$50 DIY if it is ice, debris, or a connector issue. Handle actuator assembly replacement runs $150-$350 in parts DIY (Model S/X motorized handles are more expensive than Model 3/Y). Professional labor at an independent EV shop adds $100-$250. Tesla Service Center quotes typically run $300-$600 all-in depending on model.
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Common Symptoms
- Alert VCLEFT_a045 shown on the touchscreen
- The vehicle may log the alert without any change the driver notices
Probable Causes (Ranked by Likelihood)
- The vehicle reported VCLEFT_a045. Tesla's firmware identifies this alert as "VCLEFT_a045_Task100msError" — a software timing fault in the left body controller's 100 millisecond task, not a door or window mechanism fault. High
Frequently Asked Questions
What does VCLEFT_a045 mean?
Left Body Controller — 100 ms Task Error. Tesla's firmware identifies it as "VCLEFT_a045_Task100msError".
Can a generic OBD2 scanner read this?
No. Tesla alerts are a manufacturer-specific system and appear in no SAE standard, so a generic OBD-II scan tool cannot read or clear them. The alert text on the touchscreen and the Tesla app are the authoritative sources.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
Read the alert text on the touchscreen exactly as shown — Tesla's own wording is more specific than any third-party list, this page included.
Check for a Tesla service bulletin or a pending software update; a number of alerts clear on their own after an over-the-air update.
If the alert persists, request service through the Tesla app. Tesla alerts are not standard OBD-II codes and a generic scan tool will not read or clear them.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- Tesla alert dictionary (canonical firmware alert identifiers)community-maintained dictionary, not an official manufacturer document
Commonly Affected Vehicles
- Tesla Model S (LR) -- flush motorized handles are most prone to actuator failure
- Tesla Model S (Plaid) -- same motorized handle design as LR
- Tesla Model X (LR) -- falcon-wing door system adds complexity to left-side handle faults
- Tesla Model X (Plaid) -- same handle architecture as LR
- Tesla Model 3 (RWD) -- simpler handle but position sensor faults still occur
- Tesla Model 3 (Long Range AWD) -- handle harness flex failures reported in higher-mileage examples
- Tesla Model Y (LR AWD) -- shared Model 3 platform handle design with similar failure modes
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