U1888
Hybrid Control Module Lost Communication With Energy Storage Control Module
U1888 is an OBD-II diagnostic trouble code meaning: Hybrid Control Module Lost Communication With Energy Storage Control Module. Common causes: broken or damaged wiring between modules, hybrid control module malfunction. Estimated repair cost: $167–889.
Symptoms
- Check Engine light comes on
- The hybrid system goes into emergency mode
- Reduced vehicle power
- Errors in the operation of the hybrid power plant
- Inability to use electric driving mode
Causes
- Broken or damaged wiring between modules
- Hybrid control module malfunction
- Battery controller failure
- Problems with module power supply
- Corroded connectors or poor contact
How to Fix
- Check the integrity of the wiring harness between the modules
- Check power and ground on both modules
- Inspect connectors for corrosion or damage
- Read error codes from both modules to clarify the fault
- If necessary, replace the faulty module
- Repair only from an authorized dealer
Related codes
FAQ
What does the U1888 code mean?
U1888 is an OBD-II diagnostic trouble code that indicates: Hybrid Control Module Lost Communication With Energy Storage Control Module
What causes a U1888 error code?
The most common causes of U1888 include: Broken or damaged wiring between modules; Hybrid control module malfunction; Battery controller failure; Problems with module power supply.
How do I fix a U1888 diagnostic trouble code?
To fix U1888: Check the integrity of the wiring harness between the modules. Check power and ground on both modules. Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1888?
Limited driving only, diagnose soon
How much does it cost to fix U1888?
The estimated repair cost for U1888 is $167–889. Actual cost depends on your vehicle, location, and labor rates.
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