EV Battery Diagnostics and Repair in Sacramento, CA
An EV battery problem doesn’t always mean a new pack. Most of what we see is a weak module, a BMS fault, or a cooling issue — all fixable for a fraction of pack replacement. The first step is real data.
Warning Signs Worth a Diagnostic
- Range dropping faster than normal aging explains
- Charging stops early, slows down, or errors out
- Reduced power warnings or sudden power limits
- Battery warning lights, or DTCs like P0A80 and P1121
Why It Happens
Packs fail unevenly. One weak cell group pulls the whole pack’s usable capacity down, and the car protects itself by limiting range and power. Generic code readers can’t see any of this — you need module-level access over the CAN bus.
What We Test — From $99
- Individual module and brick voltages across the entire pack
- True state of charge and capacity vs. what the dash claims
- Internal resistance and imbalance — the early-warning numbers
- BMS faults, contactors, and battery cooling performance
Our Process
- Full pack scan and health report in plain English
- If repair makes sense: firm quote for module replacement or BMS work
- If the pack is healthy: you leave with proof and peace of mind
We run these diagnostics on everything from Teslas to Chevy Volts and Bolts — including pre-purchase checks before you buy used.
Our Warranty
Every repair at AT Automotive is backed by a 12-month / 12,000-mile warranty on parts and labor. If something we fixed fails within that window, bring it back and we’ll make it right.
Book an EV Battery Diagnostic
Call (916) 957-6884 or use our contact form. AT Automotive, 8561 Weyand Ave, Sacramento. Mon–Fri 10am–5pm.