U0100 on CHRYSLER 300
Lost Communication With ECM/PCM A
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to Chrysler 300 context without treating complaints as confirmed diagnoses.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for U0100.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
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.
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."
"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. 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."
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on CHRYSLER 300
Based on NHTSA complaint component analysis for this vehicle.
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.