U0401 on Tesla Model S
Factory diagnostic protocol and troubleshooting wire for fault code U0401 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 U0401 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 U0401, 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
U0401 in the ABS or Body module is almost always a secondary code triggered because the engine has an active misfire or sensor code. Read and resolve all ECM P-codes first. on the Tesla Model S equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP / 0-60 in 1.99s).
Verify ECM is broadcasting engine RPM, throttle position, and torque calculation accurately. on the Tesla Model S equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP / 0-60 in 1.99s).
Once the root engine problem is repaired, clear codes in BOTH the ECM and the ABS/TCM module. 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 (U0401)
Tesla Model S OEM Replacement Sensor
Direct-fit replacement assembly engineered to OEM tolerances for Tesla Model S.
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 U0401 FAQs
What causes code U0401 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)), U0401 is most frequently caused by An active engine code (like P0300 or P0171) in the ECM causing the ABS/TCM module to reject engine torque data or ECM software glitch requiring re-flash.
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 U0401?
Caution. Secondary modules (ABS, Traction, BCM) have disabled certain features because the engine computer reported an active fault. Given that U0401 carries a High severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.