Lost Communication With EV Pedal Simulation Module
The U0228 code means the vehicle's onboard diagnostic system has detected: Lost Communication With EV Pedal Simulation Module. This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- hard
- Estimated cost
- $500 - $2,500 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Brake pedal feels spongy or different
- No brake pedal resistance
- Brake-by-wire system fault
- ABS warning light on
- Vehicle enters emergency braking mode
Probable Causes (Ranked by Likelihood)
- Failed brake pedal simulator module Very High
- Hydraulic fault in pedal simulator High
- CAN bus wiring fault Moderate
- Brake fluid leak in simulator Low
Step-by-Step Diagnostic Procedure
-
Check brake fluid level
-
Scan pedal simulation module for fault codes
-
Inspect pedal simulator for leaks
-
Test CAN bus communication at pedal module
Frequently Asked Questions
Can I drive with U0228?
No. Brake feel and function may be compromised. This is a critical safety issue.
What causes U0228?
Usually a failed pedal simulator module or hydraulic fault.
Is U0228 dangerous?
Yes. Stop safely and have the vehicle towed to a dealer.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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