U0073 on CHEVROLET EQUINOX — Control Module Communication Bus A Off

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

"U0073 indicates: Control Module Communication Bus A Off. This is a network communication code. 4 CHEVROLET EQUINOX owners have reported this to NHTSA."

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

"Based on 4 NHTSA reports, the most commonly cited components are: Steering,Suspension,Electrical System, Electrical System,Electronic Stability Control (Esc), Power Train,Vehicle Speed Control,Engine. These percentages are based on the component field in owner complaints."

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

"Of 4 NHTSA reports for this code on CHEVROLET EQUINOX, 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 EQUINOX 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 EQUINOX

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.

4 CHEVROLET EQUINOX owners have reported this issue to NHTSA across model years 2011-2013. Most reports come from the 2011, 2012 model years.

Real CHEVROLET EQUINOX Owner Reports

Source: NHTSA Complaints Database

"First time: march 21 - nj turnpike. car "stabilitrak icon" and service stabilitrak" msg & "tire pressure monitor" light, then "brake icon" and "abs icon" with "service power steering" msg, then "service all wheel drive system" msg - all while the icons are on - car lost all power."

— 2011 CHEVROLET EQUINOX owner · STEERING,SUSPENSION,ELECTRICAL SYSTEM · Filed 03/21/2021

"Car will throw codes p0700/u0073/u1000 - looses engine power, check stabilitrak lights up, check engine light comes on. car will buck, odometer/rpm gauge/temp gauge will become erratic. took to the chevy dealership, unable to replicate problem. unsafe to drive."

— 2011 CHEVROLET EQUINOX owner · ELECTRICAL SYSTEM,ELECTRONIC STABILITY CONTROL (ESC) · Filed 01/01/2019

"I was driving about 20 miles per hour when all the gauges on the dash board went crazy."

— 2012 CHEVROLET EQUINOX owner · POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE · Filed 07/07/2015

"I was driving on the highway and the stabilitrak light came on as well as the power steering, ABS, traction control light and engine light then my car literally slowed down and had no power."

— 2013 CHEVROLET EQUINOX owner · UNKNOWN OR OTHER · Filed 04/12/2022

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

📊 Complaint Trend by Model Year

2

'11

1

'12

1

'13

Common Causes on CHEVROLET EQUINOX

Based on NHTSA complaint component analysis for this vehicle.

STEERING,SUSPENSION,ELECTRICAL SYSTEM 25%

ELECTRICAL SYSTEM,ELECTRONIC STABILITY CONTROL (ESC) 25%

POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE 25%

UNKNOWN or OTHER 25%

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 EQUINOX? ▾

U0073 indicates: Control Module Communication Bus A Off. This is a network communication code. 4 CHEVROLET EQUINOX owners have reported this to NHTSA.

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

Based on 4 NHTSA reports, the most commonly cited components are: Steering,Suspension,Electrical System, Electrical System,Electronic Stability Control (Esc), Power Train,Vehicle Speed Control,Engine. These percentages are based on the component field in owner complaints.

Is U0073 serious on my CHEVROLET EQUINOX? ▾

Of 4 NHTSA reports for this code on CHEVROLET EQUINOX, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my CHEVROLET EQUINOX 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.