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Engine-Codes – Generic – C15C6

C15C6 Code - IG Power Supply Voltage Malfunction

Quick Answer

The diagnostic trouble code (DTC) C15C6 indicates an IG Power Supply Voltage Malfunction in the vehicle's electrical system. Common causes include Faulty wiring or connections in the ignition system, Failing ignition switch, Malfunctioning ignition relay. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
C15C6 indicates IG Power Supply Voltage Malfunction.
Common causes
Common causes include Faulty wiring or connections in the ignition system, Failing ignition switch, Malfunctioning ignition relay.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code C15C6 Description

The diagnostic trouble code (DTC) C15C6 indicates an IG Power Supply Voltage Malfunction in the vehicle's electrical system. This code typically points to an issue with the power supply voltage to the ignition system, which is crucial for starting the engine and maintaining proper operation of various vehicle systems. The ignition system requires a consistent and stable voltage supply to function correctly, and any disruptions or fluctuations in this supply can lead to performance issues and potential long-term damage if left unresolved.

OBDII Code C15C6 - IG Power Supply Voltage Malfunction
C15C6 Code - IG Power Supply Voltage Malfunction

Common Causes of C15C6

  1. Faulty wiring or connections in the ignition system
  2. Failing ignition switch
  3. Malfunctioning ignition relay
  4. Weak battery
  5. Failing alternator

Symptoms of C15C6

  1. Difficulty starting the engine
  2. Engine misfires or hesitation
  3. Stalling or rough idling
  4. Electrical issues such as dimming lights or malfunctioning accessories
  5. Check Engine Light illuminated on the dashboard

How to Fix C15C6

  1. Start by checking the battery voltage and ensuring it is within the manufacturer's specifications. Replace the battery if it is weak or failing.
  2. Inspect the wiring and connections in the ignition system for any signs of damage or corrosion. Repair or replace any faulty wiring or connections.
  3. Test the ignition switch and ignition relay for proper operation. Replace any components that are malfunctioning.
  4. Check the alternator's output voltage to ensure it is charging the battery correctly. Replace the alternator if it is failing to provide a stable power supply.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix C15C6

The typical repair costs for addressing an IG Power Supply Voltage Malfunction can range from $200 to $500, depending on the specific components that need to be replaced and the labor involved. This estimate includes the cost of parts such as a new battery, ignition switch, ignition relay, or alternator, as well as the labor charges for diagnosis and repair. It is important to note that the actual repair costs may vary based on the vehicle make and model, the location of the repair shop, and the extent of the issue. Additionally, the specific diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. It is advisable to consult with a local repair shop for a more accurate cost estimate based on your specific circumstances.

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Code C15C6 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C15C6 Code

1. What does OBDII code C15C6 mean?

C15C6 indicates an IG (Ignition) Power Supply Voltage Malfunction, meaning there’s an issue with the voltage supply to the vehicle’s control systems.

2. What are the common symptoms of code C15C6?

Symptoms may include warning lights on the dashboard, issues with starting the vehicle, erratic electrical behavior, or system failures such as ABS or traction control.

3. What causes the C15C6 code to appear?

Common causes include a weak or failing battery, loose or corroded battery terminals, faulty ignition switch, blown fuses, or damaged wiring in the ignition circuit.

4. Can a bad alternator trigger the C15C6 code?

Yes, a failing alternator can cause voltage irregularities, which might trigger the IG Power Supply Voltage Malfunction code.

5. How do I diagnose the C15C6 code?

Begin by checking the battery voltage, inspecting fuses, and looking for damaged or corroded wiring. Use a multimeter to test the ignition power supply circuit for proper voltage.

6. Is it safe to drive with the C15C6 code active?

Driving with this code can be risky as it may lead to electrical failures or the vehicle stalling unexpectedly due to inconsistent power supply.

7. How can I fix the C15C6 code?

Fixes may include replacing a weak battery, cleaning or tightening battery terminals, repairing damaged wiring, replacing blown fuses, or addressing faults in the ignition switch.

8. Can clearing the C15C6 code solve the problem?

Clearing the code without addressing the underlying issue will only temporarily remove it; the code is likely to return if the fault persists.

9. Does the C15C6 code affect other systems in the vehicle?

Yes, this code can impact systems that rely on stable power, such as ABS, traction control, or vehicle stability control.

10. When should I seek professional help for the C15C6 code?

If basic checks like the battery, fuses, and wiring don’t resolve the issue, or if electrical troubleshooting is beyond your expertise, consult a professional technician.

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