U0073 on Chevrolet Tahoe
Control Module Communication Bus A Off
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to Chevrolet Tahoe context without treating complaints as confirmed diagnoses.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for U0073.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What U0073 Means on Your Chevrolet Tahoe
U0073 is a diagnostic trouble code indicating: Control Module Communication Bus A Off. This code relates to the network communication system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.
Real Chevrolet Tahoe Owner Reports
Source: NHTSA Complaints Database
"All ip warning lamps illuminated, loss of power, stalling, gage fluctuation, intermittent door lock operation. vehicle was in motion on highway when this occurred. error codes include u0073, u0121m u0101, u0242 ( from dealership analysis). cause unknown."
"While driving approximately after 30 minutes, the vehicle would have power issues causing erratic behavior."
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on Chevrolet Tahoe
Based on NHTSA complaint component analysis for this vehicle.
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.