U0073 on CHEVROLET TAHOE — Control Module Communication Bus A Off

Q: "What does U0073 mean on a CHEVROLET TAHOE?"

"U0073 indicates: Control Module Communication Bus A Off. This is a network communication code. 2 CHEVROLET TAHOE owners have reported this to NHTSA."

Q: "What are the most common causes of U0073 on CHEVROLET TAHOE?"

"Based on 2 NHTSA reports, the most commonly cited components are: Electrical System,Electronic Stability Control (Esc),Engine, Electrical System,Electronic Stability Control (Esc). These percentages are based on the component field in owner complaints."

Q: "Is U0073 serious on my CHEVROLET TAHOE?"

"Of 2 NHTSA reports for this code on CHEVROLET TAHOE, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my CHEVROLET TAHOE shows U0073?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

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.

2 CHEVROLET TAHOE owners have reported this issue to NHTSA across model years 2008-2011. Most reports come from the 2008, 2011 model years. The most commonly reported component is Electrical System,Electronic Stability Control (Esc),Engine (50.0% of reports).

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."

— 2008 CHEVROLET TAHOE owner · ELECTRICAL SYSTEM,ELECTRONIC STABILITY CONTROL (ESC),ENGINE · Filed 01/18/2018

"While driving approximately after 30 minutes, the vehicle would have power issues causing erratic behavior."

— 2011 CHEVROLET TAHOE owner · ELECTRICAL SYSTEM,ELECTRONIC STABILITY CONTROL (ESC) · Filed 05/18/2018

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'08

1

'11

Common Causes on CHEVROLET TAHOE

Based on NHTSA complaint component analysis for this vehicle.

ELECTRICAL SYSTEM,ELECTRONIC STABILITY CONTROL (ESC),ENGINE 50%

ELECTRICAL SYSTEM,ELECTRONIC STABILITY CONTROL (ESC) 50%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does U0073 mean on a CHEVROLET TAHOE? ▾

U0073 indicates: Control Module Communication Bus A Off. This is a network communication code. 2 CHEVROLET TAHOE owners have reported this to NHTSA.

What are the most common causes of U0073 on CHEVROLET TAHOE? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Electrical System,Electronic Stability Control (Esc),Engine, Electrical System,Electronic Stability Control (Esc). These percentages are based on the component field in owner complaints.

Is U0073 serious on my CHEVROLET TAHOE? ▾

Of 2 NHTSA reports for this code on CHEVROLET TAHOE, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my CHEVROLET TAHOE shows U0073? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.