OBD Guide
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P303E

Hybrid/EV Battery Interface Control Module 12 Long Term Memory Performance

P303E is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Interface Control Module 12 Long Term Memory Performance. Common causes: battery interface control module malfunction, problems with the module's non-volatile memory. Estimated repair cost: $133–500.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$133–500 (est.)

Symptoms

  • Check Engine Light Is On
  • Possible problems with charging the hybrid battery
  • Reduced power or efficiency of the hybrid system
  • Errors in the operation of climate control or other electrical systems
  • Error message on the on-board computer display

Causes

  • Battery interface control module malfunction
  • Problems with the module's non-volatile memory
  • Corroded or damaged contacts in the module
  • Problems with module power or grounding
  • Software error or module firmware failure

How to Fix

  1. Carry out computer diagnostics to clarify the nature of the malfunction
  2. Check the integrity and reliability of the module connections
  3. Update module software if updates are available
  4. Check the condition of the wiring harness to the module
  5. Replace the Battery Interface Control Module if necessary.
  6. Repair only from an authorized dealer

Related codes

P303FP3040P303D

FAQ

What does the P303E code mean?

P303E is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Interface Control Module 12 Long Term Memory Performance

What causes a P303E error code?

The most common causes of P303E include: Battery interface control module malfunction; Problems with the module's non-volatile memory; Corroded or damaged contacts in the module; Problems with module power or grounding.

How do I fix a P303E diagnostic trouble code?

To fix P303E: Carry out computer diagnostics to clarify the nature of the malfunction. Check the integrity and reliability of the module connections. Update module software if updates are available. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P303E?

Limited driving only, diagnose soon

How much does it cost to fix P303E?

The estimated repair cost for P303E is $133–500. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat