B1325 on Tesla Model 3: Fix & DLC Location
Factory diagnostic troubleshooting wire for fault code B1325 (B1325: Device Power 1 Circuit Voltage Below Threshold (BCM)) specifically on the Tesla Model 3 (2020–2026, Single Motor RWD / Dual Motor Long Range / Highland Performance AWD (510HP)).
1. Symptoms of B1325 on Tesla Model 3
When the Engine Control Module (ECM/PCM) on your Tesla Model 3 (Single Motor RWD / Dual Motor Long Range / Highland Performance AWD (510HP)) logs fault code B1325, drivers commonly observe:
2. Most Likely Causes on Tesla Model 3
Historical warranty claims and technical repair bulletins for Tesla Model 3 point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Tesla Model 3
Interface with the diagnostic port or system console using verified scanning hardware. Record freeze-frame data, active sub-codes, and timestamps to isolate whether B1325 is static or intermittent. on the Tesla Model 3 equipped with Single Motor RWD / Dual Motor Long Range / Highland Performance AWD (510HP).
Visually inspect the physical component (Main BCM Ground Wire), connector pins, and associated wiring harnesses for signs of corrosion, thermal melting, or loose grounding clips. on the Tesla Model 3 equipped with Single Motor RWD / Dual Motor Long Range / Highland Performance AWD (510HP).
Measure reference voltages and resistance thresholds against manufacturer factory specifications. Replace any component failing nominal impedance tolerances. on the Tesla Model 3 equipped with Single Motor RWD / Dual Motor Long Range / Highland Performance AWD (510HP).
Install genuine OEM replacement hardware or execute registry / service commands. Ensure all mounting bolts are torqued to factory specifications. on the Tesla Model 3 equipped with Single Motor RWD / Dual Motor Long Range / Highland Performance AWD (510HP).
Erase the fault code from non-volatile memory. Perform a standard verification cycle (e.g. 15-minute mixed drive or system stress benchmark) to ensure monitors reset to 'Ready' state without recurrent fault flags. on the Tesla Model 3 equipped with Single Motor RWD / Dual Motor Long Range / Highland Performance AWD (510HP).
Other Common Fault Codes on Tesla Model 3
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Tesla Model 3:
4. Tesla Model 3 B1325 FAQs
What causes code B1325 to trigger on a Tesla Model 3?
On the Tesla Model 3 (Single Motor RWD / Dual Motor Long Range / Highland Performance AWD (510HP)), B1325 is most frequently caused by Component aging, oxidation, or degraded internal circuit element (Main BCM Ground Wire) or Wiring harness abrasion, loose terminal pin, or ground voltage float.
Where is the OBD-II port located on my Tesla Model 3?
On the Tesla Model 3, the 16-pin DLC diagnostic connector is located Under driver dash (OBD-II port integrates with internal CAN gateway). Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.
Can I safely drive my Tesla Model 3 with code B1325?
Caution. Limited operation permitted only to reach a nearby repair facility or backup critical personal files. Given that B1325 carries a High severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.