OBD Guide
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C2318

Low Voltage Error Power Supply Malfunction

C2318 is an OBD-II diagnostic trouble code meaning: Low Voltage Error Power Supply Malfunction. Common causes: low or faulty battery, faulty generator. Estimated repair cost: $56–167.

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

Symptoms

  • The malfunction indicator on the dashboard lights up
  • Incorrect operation of electronic systems
  • Problems starting the engine

Causes

  • Low or faulty battery
  • Faulty generator
  • Wiring harness damage
  • Contact corrosion
  • Relay or fuse problems

How to Fix

  1. Check battery and generator voltage
  2. Inspect the wiring harness for damage
  3. Check contacts and terminals for corrosion
  4. Replace faulty relays or fuses
  5. Test the system after troubleshooting

Related codes

P0562P0563B2318

FAQ

What does the C2318 code mean?

C2318 is an OBD-II diagnostic trouble code that indicates: Low Voltage Error Power Supply Malfunction

What causes a C2318 error code?

The most common causes of C2318 include: Low or faulty battery; Faulty generator; Wiring harness damage; Contact corrosion.

How do I fix a C2318 diagnostic trouble code?

To fix C2318: Check battery and generator voltage. Inspect the wiring harness for damage. Check contacts and terminals for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2318?

Limited driving only, diagnose soon

How much does it cost to fix C2318?

The estimated repair cost for C2318 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat