U0401 on JEEP COMPASS
Invalid Data Received From ECM/PCM A
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to Jeep Compass 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 U0401.
- 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 U0401 Means on Your JEEP COMPASS
U0401 is a diagnostic trouble code indicating: Invalid Data Received From ECM/PCM A. This code relates to the vehicle network, module communication, or data bus system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.
Real JEEP COMPASS Owner Reports
Source: NHTSA Complaints Database
"Code u0401. ecm/pcm. check engine light, esc light, and ecm lights came on while driving, jeep lost acceleration, and knocked when we came to a stop. incident hastened on a local road while moving at 45 mph. turned off vehicle and restarted. problem persisted and we had the vehicle towed home."
"While driving on the highway on two separate occasions now, my jeep suddenly loses power and decelerates. the engine light, electronic throttle control light and stability control light come on, the jeep runs very rough and will not accelerate."
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on JEEP COMPASS
Based on NHTSA complaint component analysis for this vehicle.
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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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.
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3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.