Lost Communication With Inverter Control Module
The U0207 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Inverter Control Module. This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- hard
- Estimated cost
- $1,000 - $5,000 (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
- Hybrid or EV system disabled
- High-voltage warning light on
- No electric motor power
- Vehicle in limp mode or will not move
- Inverter overheat warning
Probable Causes (Ranked by Likelihood)
- Failed inverter control module Very High
- Inverter coolant system failure High
- CAN bus wiring fault to inverter Moderate
- High-voltage connector issue Low
Step-by-Step Diagnostic Procedure
-
Check inverter coolant level and flow
-
Scan inverter module for temperature-related faults
-
Test CAN bus communication at inverter connector
-
Inspect high-voltage wiring and connectors
Frequently Asked Questions
Can I drive with U0207?
No. The inverter converts DC battery power to AC for the motor. Without it, the drive system is disabled.
What causes U0207?
Most commonly a failed inverter module or overheating due to coolant issues.
Is U0207 expensive?
Yes, $1,000 to $5,000. Inverter replacement is one of the costliest EV repairs.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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