Unable to AC Charge — System Will Retry Shortly
The TESLA-CP_A058 (Tesla Charge Port (CP)) EV fault code means: Unable to AC Charge — System Will Retry Shortly. This is a minor severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $0 in the common case — resolve the underlying equipment or connection issue and the vehicle resumes charging on its own.
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Common Symptoms
- Alert on the touchscreen: "Unable to AC charge - System will retry shortly — Disconnect and retry or use different equipment"
- AC charging won't start after repeated automatic attempts
- The vehicle will retry on its own after some time
- Driving is unaffected
Probable Causes (Ranked by Likelihood)
- The vehicle has tried to charge too many times without success because of one of these conditions (Tesla's official list): the charge port can't detect the cable or its type; no valid pilot signal from the station; communication with the equipment was interrupted; or the equipment reported an error Likely
Frequently Asked Questions
What does CP_a058 mean on a Tesla?
Tesla's official meaning: the vehicle is unable to AC charge because it detected a charging problem (cable detection, pilot signal, communication loss, or an equipment error) and has already retried too many times without success. It will automatically retry again after some time.
How do I fix CP_a058?
Disconnect and reconnect the cable to force an immediate retry, and check Controls > Service > Notifications for the companion alert that names the underlying issue. If retries keep failing, troubleshoot that companion alert or use different equipment.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
This is the retry-backoff alert: after too many failed attempts, the vehicle pauses and retries later automatically. If the underlying condition clears, charging resumes on its own.
To retry sooner, disconnect the charge cable and reconnect it — per Tesla's official guidance.
Check Controls > Service > Notifications on the touchscreen for other recent charging alerts — the companion alert identifies the actual underlying condition (equipment detection, pilot signal, communication loss, or an equipment-reported error).
If retries keep failing, work the companion alert's troubleshooting, or try different equipment / a Supercharger.
Sources 4
This page is built from documented references. Verify against your own service info before repair work.
- Tesla Model 3 Owner's ManualTroubleshooting Alerts (official Tesla alert text for CP_a058; verified against the official Model 3 manual PDF, software 2026.20)
- Tesla Model Y Owner's ManualTroubleshooting Alerts (confirms CP_a058 is documented across models)
- Tesla firmware alert reference (core-hacked/tesla-alerts-dictionary): cp_a058community-maintained dictionary, not an official manufacturer document
- Tessie Tesla alert statisticsthird-party Tesla alert reference with owner-telemetry frequency — not an official Tesla document
Commonly Affected Vehicles
- Tesla Model 3
- Tesla Model Y
- Tesla Model S
- Tesla Model X
- Tesla Cybertruck
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