OBD Guide
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P3014

Battery Block 4 Becomes Weak

P3014 is an OBD-II diagnostic trouble code meaning: Battery Block 4 Becomes Weak. Common causes: wear of battery elements of block 4, imbalance between battery packs. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–556 (est.)

Symptoms

  • Reduced engine power
  • Increased fuel consumption (in hybrids)
  • Dashboard warning
  • Speed limit
  • Battery charging problems

Causes

  • Wear of battery elements of block 4
  • Imbalance between battery packs
  • Problems with the Battery Management System (BMS)
  • Damage to battery cells
  • Poor contact in battery circuit

How to Fix

  1. Diagnosis of the status of all battery units
  2. Checking the block balancing system
  3. Replacing a faulty battery pack
  4. Battery Management System Software Update
  5. Checking the integrity of harnesses and contacts

Related codes

P3011P3012P3013P3015

FAQ

What does the P3014 code mean?

P3014 is an OBD-II diagnostic trouble code that indicates: Battery Block 4 Becomes Weak

What causes a P3014 error code?

The most common causes of P3014 include: Wear of battery elements of block 4; Imbalance between battery packs; Problems with the Battery Management System (BMS); Damage to battery cells.

How do I fix a P3014 diagnostic trouble code?

To fix P3014: Diagnosis of the status of all battery units. Checking the block balancing system. Replacing a faulty battery pack. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3014?

Limited driving only, diagnose soon

How much does it cost to fix P3014?

The estimated repair cost for P3014 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat