OBD Guide
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B1517

Battery Voltage Low Or High

B1517 is an OBD-II diagnostic trouble code meaning: Battery Voltage Low Or High. Common causes: faulty generator, worn or discharged battery. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Difficulty starting the engine
  • Dashboard flashing or turning off
  • Unstable engine operation at idle
  • Reduced efficiency of electrical equipment

Causes

  • Faulty generator
  • Worn or discharged battery
  • Problems with wiring harness or contacts
  • Voltage regulator malfunction
  • Short circuit in the circuit

How to Fix

  1. Check battery voltage with engine off and running
  2. Inspect the battery terminals and contacts for corrosion or damage.
  3. Check the condition of the generator and drive belt
  4. Test the voltage regulator
  5. Check the integrity of the wiring harness and grounding

Related codes

P0562P0563P0620

FAQ

What does the B1517 code mean?

B1517 is an OBD-II diagnostic trouble code that indicates: Battery Voltage Low Or High

What causes a B1517 error code?

The most common causes of B1517 include: Faulty generator; Worn or discharged battery; Problems with wiring harness or contacts; Voltage regulator malfunction.

How do I fix a B1517 diagnostic trouble code?

To fix B1517: Check battery voltage with engine off and running. Inspect the battery terminals and contacts for corrosion or damage.. Check the condition of the generator and drive belt. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1517?

Limited driving only, diagnose soon

How much does it cost to fix B1517?

The estimated repair cost for B1517 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat