P0300 on Tesla Model Y: Symptoms, Causes & DIY Fix
Official technical diagnostic wire for fault code P0300 (P0300: Random or Multiple Cylinder Misfire Detected) specifically affecting Tesla Model Y vehicles equipped with Dual Motor AWD Long Range / Performance (0-60 in 3.5s).
1. Symptoms of P0300 on Tesla Model Y
When the Engine Control Module (ECM/PCM) on your Tesla Model Y (Dual Motor AWD Long Range / Performance (0-60 in 3.5s)) logs fault code P0300, drivers commonly observe:
2. Most Likely Causes on Tesla Model Y
Historical warranty claims and technical repair bulletins for Tesla Model Y point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Tesla Model Y
Plug a handheld OBD-II scanner into the 16-pin port under the dashboard. Check if specific cylinder codes like P0301 (Cylinder 1) or P0304 (Cylinder 4) accompany P0300. on the Tesla Model Y equipped with Dual Motor AWD Long Range / Performance (0-60 in 3.5s).
Remove the ignition coils, use a spark plug socket with ratchet to unthread spark plugs. Inspect electrode tips for carbon buildup, oil fouling, or burnt gaps. Replace with OEM iridium plugs gapped to spec. on the Tesla Model Y equipped with Dual Motor AWD Long Range / Performance (0-60 in 3.5s).
Perform an ignition swap test: Swap coil from a suspected misfiring cylinder to an adjacent cylinder. Clear codes and re-scan. If the misfire moves, replace the faulty coil. on the Tesla Model Y equipped with Dual Motor AWD Long Range / Performance (0-60 in 3.5s).
Inspect PCV hoses, intake boot, and vacuum lines for cracking or hissing sounds while engine idles. Smoke test the intake if necessary. on the Tesla Model Y equipped with Dual Motor AWD Long Range / Performance (0-60 in 3.5s).
Add a bottle of premium fuel injector cleaner (e.g. Chevron Techron). Clear the OBD-II codes with your scanner and take the car on a 15-minute drive cycle to confirm readiness monitors reset. on the Tesla Model Y equipped with Dual Motor AWD Long Range / Performance (0-60 in 3.5s).
4. Tesla Model Y P0300 FAQs
What causes code P0300 to trigger on a Tesla Model Y?
On the Tesla Model Y (Dual Motor AWD Long Range / Performance (0-60 in 3.5s)), P0300 is most frequently caused by Worn or fouled spark plugs and damaged spark plug wires or Failing ignition coils or coil packs. Factory sensor degradation or wiring harness wear near the engine bay are common factors.
Can I safely drive my Tesla Model Y with code P0300?
No. Driving with a flashing check engine light causes irreversible catalytic converter damage. Given that P0300 carries a Critical severity rating on Tesla vehicles, we advise performing diagnostic scanning via the OBD-II port located beneath steering wheel lower cover assembly before extended highway driving.
Where is the diagnostic port located on the Tesla Model Y?
The 16-pin OBD-II DLC connector on the Tesla Model Y is situated beneath steering wheel lower cover assembly. It requires no special tools to plug in a standard scanner.
How much does it cost to fix P0300 on a Tesla Model Y?
DIY replacement parts typically range between $100 - $600 (DIY: $30 - $120). If serviced at an authorized Tesla dealership, expect an additional $120–$250 in professional labor based on their $195/hr hourly rate.