U0101 on CHEVROLET IMPALA — Lost Communication With TCM

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

"U0101 indicates: Lost Communication With TCM. This is a network communication code. 3 CHEVROLET IMPALA owners have reported this to NHTSA."

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

"Based on 3 NHTSA reports, the most commonly cited components are: Electrical System,Engine, Steering,Power Train,Electrical System, Power Train. These percentages are based on the component field in owner complaints."

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

"Of 3 NHTSA reports for this code on CHEVROLET IMPALA, 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 IMPALA 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 IMPALA

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.

3 CHEVROLET IMPALA owners have reported this issue to NHTSA across model years 2012-2014. Most reports come from the 2014, 2012 model years.

Real CHEVROLET IMPALA Owner Reports

Source: NHTSA Complaints Database

"I have about 08/1825 had the throttle body replaced on my vehicle which assisted with the problem temporarily. Then the problem started again 09/20/25 the car act like it’s stalling while driving and can’t see what hear the vehicle is in."

— 2012 CHEVROLET IMPALA owner · ELECTRICAL SYSTEM,ENGINE · Filed 09/20/2025

"Power steering stability trak doors locking making clicking sound all this shows up on dash and the car feels like it is accelerating and then jerks slows down and a big sound putting it into gear and a code that says U0101"

— 2014 CHEVROLET IMPALA owner · STEERING,POWER TRAIN,ELECTRICAL SYSTEM · Filed 07/14/2023

"I have taken it in on several occasions and been told there is no active code. My transmission control module constantly looses communication. Through my research I have found numerous accounts of this part failing and GM not repairing it, nor issuing a safety recall."

— 2014 CHEVROLET IMPALA owner · POWER TRAIN · Filed 06/01/2022

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

📊 Complaint Trend by Model Year

1

'12

2

'14

Common Causes on CHEVROLET IMPALA

Based on NHTSA complaint component analysis for this vehicle.

ELECTRICAL SYSTEM,ENGINE 33.3%

STEERING,POWER TRAIN,ELECTRICAL SYSTEM 33.3%

POWER TRAIN 33.3%

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 IMPALA? ▾

U0101 indicates: Lost Communication With TCM. This is a network communication code. 3 CHEVROLET IMPALA owners have reported this to NHTSA.

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

Based on 3 NHTSA reports, the most commonly cited components are: Electrical System,Engine, Steering,Power Train,Electrical System, Power Train. These percentages are based on the component field in owner complaints.

Is U0101 serious on my CHEVROLET IMPALA? ▾

Of 3 NHTSA reports for this code on CHEVROLET IMPALA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my CHEVROLET IMPALA 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.