P0303 on Tesla Model 3: Fix & DLC Location
Factory diagnostic troubleshooting wire for fault code P0303 (P0303: Cylinder 3 Misfire Detected) specifically on the Tesla Model 3 (2020–2026, Single Motor RWD / Dual Motor Long Range / Highland Performance AWD (510HP)).
1. Symptoms of P0303 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 P0303, 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 P0303 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 (Cylinder 3 Coil Pack / Injector), 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 P0303 FAQs
What causes code P0303 to trigger on a Tesla Model 3?
On the Tesla Model 3 (Single Motor RWD / Dual Motor Long Range / Highland Performance AWD (510HP)), P0303 is most frequently caused by Component aging, oxidation, or degraded internal circuit element (Cylinder 3 Coil Pack / Injector) 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 P0303?
No. Immediate shutdown / repair required to prevent permanent hardware destruction or total system lockup. Given that P0303 carries a Critical severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.