OBD Guide
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P3004

Power Cable Malfunction

P3004 is an OBD-II diagnostic trouble code meaning: Power Cable Malfunction. Common causes: damage to the power cable, battery terminal oxidation. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Unstable engine operation
  • Problems starting the engine
  • Dashboard flickering or dimming
  • Reduced power of electrical equipment
  • The appearance of other errors in the ECU

Causes

  • Damage to the power cable
  • Battery terminal oxidation
  • Generator malfunction
  • Poor contact in connectors
  • Wiring harness damage

How to Fix

  1. Check the condition of the battery terminals
  2. Inspect power cables for damage
  3. Check generator voltage
  4. Test power circuit integrity
  5. Check all connections and connectors

Related codes

P3001P3002P3003

FAQ

What does the P3004 code mean?

P3004 is an OBD-II diagnostic trouble code that indicates: Power Cable Malfunction

What causes a P3004 error code?

The most common causes of P3004 include: Damage to the power cable; Battery terminal oxidation; Generator malfunction; Poor contact in connectors.

How do I fix a P3004 diagnostic trouble code?

To fix P3004: Check the condition of the battery terminals. Inspect power cables for damage. Check generator voltage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3004?

Limited driving only, diagnose soon

How much does it cost to fix P3004?

The estimated repair cost for P3004 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat