OBD Guide
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B2802

Quick Charge Isolation Signal Error

B2802 is an OBD-II diagnostic trouble code meaning: Quick Charge Isolation Signal Error. Common causes: open or short circuit in wiring harness, isolation solenoid valve malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Dashboard warning
  • Disabling fast charging
  • Reduced charging efficiency

Causes

  • Open or short circuit in wiring harness
  • Isolation solenoid valve malfunction
  • Problems with the charging control unit
  • Contact corrosion
  • Damage to high voltage components

How to Fix

  1. High voltage system diagnostics
  2. Checking the integrity of the wiring harness
  3. Isolation Solenoid Valve Testing
  4. Checking connections and contacts
  5. Replacing faulty components
  6. Error reset and test check

Related codes

B2800B2801P0AA6

FAQ

What does the B2802 code mean?

B2802 is an OBD-II diagnostic trouble code that indicates: Quick Charge Isolation Signal Error

What causes a B2802 error code?

The most common causes of B2802 include: Open or short circuit in wiring harness; Isolation solenoid valve malfunction; Problems with the charging control unit; Contact corrosion.

How do I fix a B2802 diagnostic trouble code?

To fix B2802: High voltage system diagnostics. Checking the integrity of the wiring harness. Isolation Solenoid Valve Testing. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2802?

Limited driving only, diagnose soon

How much does it cost to fix B2802?

The estimated repair cost for B2802 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat