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U0073HondaHonda CR-V HubAll Honda U0073Critical Severity

U0073 on Honda CR-V

Control Module Communication Bus A Off

Factory diagnostic protocol and troubleshooting wire for fault code U0073 specifically for the Honda CR-V (2020–2026, 1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP)).

Verified OEM Telemetry & Field Repair Tree
Honda CR-V2020–2026
Honda CR-V
SUV1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
CR-V 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 Honda Model:
Diagnose U0073 on Specific CR-V Model Year:

1. Symptoms of U0073 on Honda CR-V

When the Engine Control Module (ECM/PCM) on your Honda CR-V (1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP)) logs fault code U0073, drivers commonly observe:

StabiliTrak / Traction / ABS / Engine warning lights lit on Honda CR-V (1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP))
Transmission shifting harshly or refusing to shift out of 2nd gear on Honda CR-V (1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP))
No communication with TCM, ABS, or BCM on Honda CR-V (1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP))
Engine may refuse to crank on Honda CR-V (1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP))
Honda CR-V OBD-II Port Location
The 16-pin diagnostic connector is located Driver side lower knee panel. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Honda CR-V

Historical warranty claims and technical repair bulletins for Honda CR-V point to the following failure distribution:

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

3. Step-by-Step DIY Repair Guide for Honda CR-V

01
Unplug All Aftermarket OBD-II Devices

Remove any aftermarket insurance dongles, GPS trackers, or scan tools plugged into the DLC port. on the Honda CR-V equipped with 1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP).

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 Honda CR-V equipped with 1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP).

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 Honda CR-V equipped with 1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP).

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 Honda CR-V equipped with 1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP).

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 Honda CR-V equipped with 1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP).

Required Tool: Scan Tool
Recommended Parts & Testing Tools

Equipment for Diagnosing Honda CR-V (U0073)

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Honda CR-V OEM Replacement Sensor

4.7 / 5.0 (Verified Fit)

Direct-fit replacement assembly engineered to OEM tolerances for Honda CR-V.

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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.

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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.

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Other Common Fault Codes on Honda CR-V

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Honda CR-V:

4. Honda CR-V U0073 FAQs

What causes code U0073 to trigger on a Honda CR-V?

On the Honda CR-V (1.5L Turbo (190HP) / 2.0L Two-Motor Hybrid (204HP)), 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 Honda CR-V?

On the Honda CR-V, the 16-pin DLC diagnostic connector is located Driver side lower knee panel. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.

Can I safely drive my Honda CR-V 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.