U0100 on CHRYSLER 300 — Lost Communication With ECM/PCM A

Q: "What does U0100 mean on a CHRYSLER 300?"

"U0100 indicates: Lost Communication With ECM/PCM A. This is a network communication code. 3 CHRYSLER 300 owners have reported this to NHTSA."

Q: "What are the most common causes of U0100 on CHRYSLER 300?"

"Based on 3 NHTSA reports, the most commonly cited components are: Unknown Or Other, Steering,Service Brakes,Engine. These percentages are based on the component field in owner complaints."

Q: "Is U0100 serious on my CHRYSLER 300?"

"Of 3 NHTSA reports for this code on CHRYSLER 300, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my CHRYSLER 300 shows U0100?"

"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 U0100 Means on Your CHRYSLER 300

U0100 is a diagnostic trouble code indicating: Lost Communication With ECM/PCM A. This code relates to the network communication system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

3 CHRYSLER 300 owners have reported this issue to NHTSA across model years 2006. Most reports come from the 2006 model year. The most commonly reported component is Unknown Or Other (66.7% of reports).

Real CHRYSLER 300 Owner Reports

Source: NHTSA Complaints Database

"The car is prone to intermittent stalling, in which the engine cuts out without warning or signs of stumbling. Often it happens at idle or when initially accelerating from idle, but has also happened several times at speed, up to 40 mph, with accompanying loss of power steering."

— 2006 CHRYSLER 300 owner · UNKNOWN OR OTHER · Filed 10/30/2022

"When driving the vehicle it will out of no where without warning shut off on you. youy lose all power. i was on highway at 70 mph and the vehicle shut off and with loss of power was hard to get the car to right edge of road and was almost hit by a semi truck."

— 2006 CHRYSLER 300 owner · UNKNOWN OR OTHER · Filed 01/02/2020

"2006 chrysler 300. bought this car for my 16 year old daughter to drive. the car starting stumbling and stalling at random times, and speeds, once while driving at 80 mph the rpms dropped to 0 and the check engine light flashed; it always just flashes."

— 2006 CHRYSLER 300 owner · STEERING,SERVICE BRAKES,ENGINE · Filed 03/25/2015

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

📊 Complaint Trend by Model Year

3

'06

Common Causes on CHRYSLER 300

Based on NHTSA complaint component analysis for this vehicle.

UNKNOWN or OTHER 66.7%

STEERING,SERVICE BRAKES,ENGINE 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 U0100 mean on a CHRYSLER 300? ▾

U0100 indicates: Lost Communication With ECM/PCM A. This is a network communication code. 3 CHRYSLER 300 owners have reported this to NHTSA.

What are the most common causes of U0100 on CHRYSLER 300? ▾

Based on 3 NHTSA reports, the most commonly cited components are: Unknown Or Other, Steering,Service Brakes,Engine. These percentages are based on the component field in owner complaints.

Is U0100 serious on my CHRYSLER 300? ▾

Of 3 NHTSA reports for this code on CHRYSLER 300, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my CHRYSLER 300 shows U0100? ▾

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.