Lost Communication With Fuel Cell Hydrogen Pump Module
The U0214 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Fuel Cell Hydrogen Pump Module. This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- hard
- Estimated cost
- $2,000 - $6,000 (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
- Hydrogen delivery fault warning
- Fuel cell output severely reduced
- Vehicle will not start
- Low hydrogen pressure warning
- Multiple fuel cell warnings
Probable Causes (Ranked by Likelihood)
- Failed hydrogen pump module Very High
- Hydrogen line leak or blockage High
- CAN bus wiring fault to pump module Moderate
- Hydrogen tank valve issue Low
Step-by-Step Diagnostic Procedure
-
Check hydrogen system for leaks
-
Verify hydrogen tank pressure
-
Scan hydrogen pump module for codes
-
Test CAN bus communication at pump module
Frequently Asked Questions
Can I drive with U0214?
No. Without hydrogen delivery the fuel cell cannot produce electricity.
What causes U0214?
Most commonly a failed hydrogen pump module or hydrogen line blockage.
Is U0214 dangerous?
Hydrogen leaks can be hazardous. If you see warnings, stop and call for professional help.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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