P0443 on Tesla Model S
Factory diagnostic protocol and troubleshooting wire for fault code P0443 specifically for the Tesla Model S (2020–2026, Dual Motor AWD / Tri-Motor Plaid (1,020 HP / 0-60 in 1.99s)).
1. Symptoms of P0443 on Tesla Model S
When the Engine Control Module (ECM/PCM) on your Tesla Model S (Dual Motor AWD / Tri-Motor Plaid (1,020 HP / 0-60 in 1.99s)) logs fault code P0443, drivers commonly observe:
2. Most Likely Causes on Tesla Model S
Historical warranty claims and technical repair bulletins for Tesla Model S point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Tesla Model S
Find the purge valve mounted on the intake manifold with one vacuum line leading to the intake and one to the charcoal canister. on the Tesla Model S equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP / 0-60 in 1.99s).
Unplug 2-pin connector and measure resistance across terminals with multimeter. Typical spec is 14–30 ohms. If open (OL) or shorted (0 ohms), solenoid is dead. on the Tesla Model S equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP / 0-60 in 1.99s).
Remove purge valve and blow into it. A healthy de-energized purge valve should be 100% sealed. If air passes through, the internal seal is stuck open. on the Tesla Model S equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP / 0-60 in 1.99s).
Disconnect quick-release vapor lines, unbolt mounting bracket, snap new OEM purge valve into place, and reconnect electrical plug. on the Tesla Model S equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP / 0-60 in 1.99s).
Clear DTCs with scanner and verify EVAP monitor completes. on the Tesla Model S equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP / 0-60 in 1.99s).
Equipment for Diagnosing Tesla Model S (P0443)
OEM Tethered Fuel Gas Cap with O-Ring
Tight-sealing factory fuel cap resolves common EVAP small/large leak codes without workshop visits.
AstroAI Auto-Ranging Digital Multimeter
Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.
BlueDriver Bluetooth Pro OBDII Scan Tool
Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.
Other Common Fault Codes on Tesla Model S
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Tesla Model S:
4. Tesla Model S P0443 FAQs
What causes code P0443 to trigger on a Tesla Model S?
On the Tesla Model S (Dual Motor AWD / Tri-Motor Plaid (1,020 HP / 0-60 in 1.99s)), P0443 is most frequently caused by Failed EVAP purge solenoid coil (open or shorted internally) or Broken or frayed wiring harness to purge valve connector.
Where is the OBD-II port located on my Tesla Model S?
On the Tesla Model S, the 16-pin DLC diagnostic connector is located Under center dash / driver kick panel bulkhead. 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 S with code P0443?
Yes. Safe to drive, but engine may experience hard starting after refueling at gas station. Given that P0443 carries a Medium severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.