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P2668 Dodge Code - Fuel Mode Indicator Lamp Control Circuit

Quick Answer

The P2668 diagnostic trouble code (DTC) for Dodge vehicles relates to the Fuel Mode Indicator Lamp Control Circuit. Common causes include Faulty fuel mode indicator lamp, Wiring harness issues, ECM/PCM malfunction. 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
P2668 Dodge indicates Fuel Mode Indicator Lamp Control Circuit.
Common causes
Common causes include Faulty fuel mode indicator lamp, Wiring harness issues, ECM/PCM malfunction.
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 09, 2024
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Code P2668 Dodge Description

The P2668 diagnostic trouble code (DTC) for Dodge vehicles relates to the Fuel Mode Indicator Lamp Control Circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the fuel mode indicator lamp on the dashboard. The fuel mode indicator lamp is used to inform the driver about the current fuel mode the vehicle is operating in, such as economy mode, power mode, or other modes depending on the vehicle's design.

OBDII Code P2668 Dodge - Fuel Mode Indicator Lamp Control Circuit
P2668 Dodge Code - Fuel Mode Indicator Lamp Control Circuit

Common Causes of P2668 Dodge

  1. Faulty fuel mode indicator lamp
  2. Wiring harness issues
  3. ECM/PCM malfunction
  4. Sensor or switch failure
  5. Loose or corroded electrical connections

Symptoms of P2668 Dodge

  1. Illumination of the check engine light
  2. Inaccurate or no display of fuel mode on the dashboard
  3. Fluctuating fuel mode indicator
  4. Loss of communication with the ECM/PCM

How to Fix P2668 Dodge

  1. Diagnose the issue using a scan tool to verify the P2668 code and check for any related codes.
  2. Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the fuel mode indicator lamp and related components for proper function. Replace any faulty parts.
  4. Check the ECM/PCM for proper operation and communication. Perform any necessary reprogramming or replacement.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2668 Dodge

The typical repair costs for addressing the P2668 code related to the Fuel Mode Indicator Lamp Control Circuit can range from $150 to $400, including parts and labor. However, actual costs may vary depending on the specific diagnosis time, labor rates, and parts required for the repair. It is recommended to consult with a qualified mechanic or auto repair shop for an accurate estimate based on your vehicle's make and model.

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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 P2668 Dodge Code

1. What does the OBDII code P2668 mean on a Dodge vehicle?

Code P2668 indicates an issue with the Fuel Mode Indicator Lamp Control Circuit, which monitors fuel system mode and communicates it to the dashboard lamp.

2. What are common symptoms of the P2668 code?

Symptoms may include a malfunctioning fuel mode indicator lamp, poor fuel economy, or inconsistent engine performance.

3. What causes the P2668 code on a Dodge?

Common causes include faulty wiring or connectors, a damaged fuel mode indicator lamp, or a malfunctioning control module.

4. Can I drive my Dodge if the P2668 code is active?

While the vehicle may still be drivable, ignoring the code can lead to worsening fuel system efficiency and potential long-term damage.

5. How do I diagnose the P2668 code on a Dodge vehicle?

Use an OBDII scanner to confirm the code, inspect wiring and connectors for damage, and test the lamp control circuit and related components.

6. How is the P2668 code fixed on a Dodge?

Repairs may involve replacing damaged wiring or connectors, repairing the lamp control circuit, or replacing the faulty indicator lamp.

7. How much does it cost to fix the P2668 code on a Dodge?

Repair costs vary, but minor fixes like wiring repairs may cost $50-$150, while replacing components may cost $200-$400.

8. Can a faulty fuel mode indicator lamp cause the P2668 code?

Yes, a damaged or malfunctioning fuel mode indicator lamp can trigger this code due to circuit failure.

9. Can a failing control module cause the P2668 code?

Yes, a defective control module may fail to properly communicate with the fuel mode indicator lamp, leading to this code.

10. Does clearing the P2668 code fix the issue permanently?

Clearing the code without addressing the underlying problem will not fix the issue and the code is likely to return.

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