U0101 on CHEVROLET EQUINOX — Lost Communication With TCM

Q: "What does U0101 mean on a CHEVROLET EQUINOX?"

"U0101 indicates: Lost Communication With TCM. This is a network communication code. 2 CHEVROLET EQUINOX owners have reported this to NHTSA."

Q: "What are the most common causes of U0101 on CHEVROLET EQUINOX?"

"Based on 2 NHTSA reports, the most commonly cited components are: Unknown Or Other, Power Train. These percentages are based on the component field in owner complaints."

Q: "Is U0101 serious on my CHEVROLET EQUINOX?"

"Of 2 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 U0101?"

"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 U0101 Means on Your CHEVROLET EQUINOX

U0101 is a diagnostic trouble code indicating: Lost Communication With TCM. 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 EQUINOX owners have reported this issue to NHTSA across model years 2013-2019. Most reports come from the 2013, 2019 model years. The most commonly reported component is Unknown Or Other (50.0% of reports).

Real CHEVROLET EQUINOX Owner Reports

Source: NHTSA Complaints Database

"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

"The contact owns a 2019 Chevrolet Equinox. The contact stated that the check engine warning light was illuminated. The vehicle was taken to an Advanced Auto Parts where a diagnostic test was performed and DTC U0101 and P12A6 were retrieved."

— 2019 CHEVROLET EQUINOX owner · POWER TRAIN · Filed 03/20/2025

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

📊 Complaint Trend by Model Year

1

'13

1

'19

Common Causes on CHEVROLET EQUINOX

Based on NHTSA complaint component analysis for this vehicle.

UNKNOWN or OTHER 50%

POWER TRAIN 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 U0101 mean on a CHEVROLET EQUINOX? ▾

U0101 indicates: Lost Communication With TCM. This is a network communication code. 2 CHEVROLET EQUINOX owners have reported this to NHTSA.

What are the most common causes of U0101 on CHEVROLET EQUINOX? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Unknown Or Other, Power Train. These percentages are based on the component field in owner complaints.

Is U0101 serious on my CHEVROLET EQUINOX? ▾

Of 2 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 U0101? ▾

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.