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U0073TeslaTesla Model X HubAll Tesla U0073Critical Severity

U0073 on Tesla Model X

Control Module Communication Bus A Off

Factory diagnostic protocol and troubleshooting wire for fault code U0073 specifically for the Tesla Model X (2020–2026, Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors)).

Verified OEM Telemetry & Field Repair Tree
Tesla Model X2020–2026
Tesla Model X
EVDual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
Model X SAE Mode $01
ECU Network Bus
500 kbps CAN-FD
ISO 15765-4 Compliant
Drivability Status
Not Recommended
Critical urgency level
Est. Repair Cost
$150 - $850 (DIY: $40 - $200)
Parts & Labor DIY
Check U0073 On Another Tesla Model:
Diagnose U0073 on Specific Model X Model Year:

1. Symptoms of U0073 on Tesla Model X

When the Engine Control Module (ECM/PCM) on your Tesla Model X (Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors)) logs fault code U0073, drivers commonly observe:

StabiliTrak / Traction / ABS / Engine warning lights lit on Tesla Model X (Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors))
Transmission shifting harshly or refusing to shift out of 2nd gear on Tesla Model X (Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors))
No communication with TCM, ABS, or BCM on Tesla Model X (Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors))
Engine may refuse to crank on Tesla Model X (Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors))
Tesla Model X OBD-II Port Location
The 16-pin diagnostic connector is located Driver side lower instrument panel trim. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Tesla Model X

Historical warranty claims and technical repair bulletins for Tesla Model X point to the following failure distribution:

55%
Loose or corroded ground connection on transmission or frame (Tesla OEM Part)
25%
Faulty Transmission Control Module (TCM) or ABS module pulling bus down (Tesla OEM Part)
12%
Poor connection at large body-to-chassis pass-through harness connector (Tesla OEM Part)
8%
Aftermarket accessory (remote starter, GPS tracker, cheap OBD scanner) broadcasting invalid data (Tesla OEM Part)
* Source: Synthesized from NHTSA ODI field repair telemetry and verified OEM Technical Service Bulletin (TSB) repair tree frequency percentiles for Tesla Model X.

3. Step-by-Step DIY Repair Guide for Tesla Model X

01
Unplug All Aftermarket OBD-II Devices

Remove any aftermarket insurance dongles, GPS trackers, or scan tools plugged into the DLC port. on the Tesla Model X equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors).

Required Tool: None
02
Inspect Frame and Transmission Ground Straps

Inspect braided ground straps on engine and transmission. Clean all contact surfaces to bare metal. on the Tesla Model X equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors).

Required Tool: Wire Brush, Sockets
03
Perform Full Vehicle Network Topology Scan

Scan all modules on vehicle. Note which modules are online and which are offline to pinpoint the break in the network daisy-chain. on the Tesla Model X equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors).

Required Tool: Full-System OBD-II Diagnostic Scanner
04
Check Terminating Resistance (60 Ohms)

Verify 60 ohms across Pins 6 and 14 with battery disconnected. on the Tesla Model X equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors).

Required Tool: Multimeter
05
Clear All System DTCs & Road Test

Clear DTCs from all modules and road test to verify error-free network transmission. on the Tesla Model X equipped with Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors).

Required Tool: Scan Tool
Recommended Parts & Testing Tools

Equipment for Diagnosing Tesla Model X (U0073)

Prime Fast Delivery & Verified Fitment
Direct-Fit Replacement Part

Tesla Model X OEM Replacement Sensor

4.7 / 5.0 (Verified Fit)

Direct-fit replacement assembly engineered to OEM tolerances for Tesla Model X.

$45 – $95 Prime
Check Fitment on Amazon
Sensor Signal Voltage Meter

AstroAI Auto-Ranging Digital Multimeter

4.6 / 5.0 (Best Seller)

Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.

$29.99 Prime
View on Amazon
Top Mobile OBD-II Scanner

BlueDriver Bluetooth Pro OBDII Scan Tool

4.7 / 5.0 (50,000+ Reviews)

Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

Compare OEM & Aftermarket Replacement Sensors for Tesla Model XVerified direct-fit pricing from Denso, Bosch, Motorcraft, and ACDelco on Amazon.
Find Parts on Amazon
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Other Common Fault Codes on Tesla Model X

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Tesla Model X:

4. Tesla Model X U0073 FAQs

What causes code U0073 to trigger on a Tesla Model X?

On the Tesla Model X (Dual Motor AWD / Tri-Motor Plaid (1,020 HP Falcon Wing Doors)), U0073 is most frequently caused by Loose or corroded ground connection on transmission or frame or Faulty Transmission Control Module (TCM) or ABS module pulling bus down.

Where is the OBD-II port located on my Tesla Model X?

On the Tesla Model X, the 16-pin DLC diagnostic connector is located Driver side lower instrument panel trim. 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 X with code U0073?

No. Bus is shut down due to excessive transmission errors, leaving vehicle in unpredictable limp mode. Given that U0073 carries a Critical severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.