Lost Communication With Hybrid Powertrain Control Module
The U0205 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Hybrid Powertrain Control 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
- Hybrid system warning light on
- Vehicle will not start or enter ready mode
- Loss of electric drive capability
- Reduced power or limp mode
- Check hybrid system message displayed
Probable Causes (Ranked by Likelihood)
- Failed hybrid powertrain control module Very High
- High-voltage battery communication fault High
- CAN bus wiring issue to hybrid module Moderate
- Software corruption in hybrid controller Low
Step-by-Step Diagnostic Procedure
-
Check high-voltage battery disconnect status
-
Scan hybrid module for stored fault codes
-
Test CAN bus communication at hybrid controller
-
Verify hybrid module power supply and ground
Frequently Asked Questions
Can I drive with U0205?
No. The hybrid system may not function at all. Do not drive until diagnosed by a qualified technician.
What causes U0205?
Most commonly a failed hybrid powertrain control module or high-voltage battery communication issue.
Is U0205 expensive to fix?
Yes, ranging from $500 to $2,500. Sometimes a software reflash resolves it at lower cost.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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