Engine-CodesDodge – P1399 Dodge

P1399 Dodge Code - Wait To Start Lamp Circuit Condition

Quick Answer

The P1399 diagnostic trouble code for Dodge vehicles refers to a potential issue with the Wait To Start Lamp Circuit. Common causes include Faulty glow plug relay or control module, Damaged wiring or connectors in the wait to start lamp circuit, Malfunctioning glow plugs. 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
P1399 Dodge indicates Wait To Start Lamp Circuit Condition.
Common causes
Common causes include Faulty glow plug relay or control module, Damaged wiring or connectors in the wait to start lamp circuit, Malfunctioning glow plugs.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1399 Dodge Description

The P1399 diagnostic trouble code for Dodge vehicles refers to a potential issue with the Wait To Start Lamp Circuit. This code typically indicates a problem with the circuit that controls the wait to start lamp on the dashboard. The wait to start lamp is an indicator that informs the driver when the glow plugs in a diesel engine are preheating before starting the engine. When this circuit malfunctions, it can lead to difficulties in starting the vehicle, especially in colder weather conditions where the glow plugs are crucial for ignition.

OBDII Code P1399 Dodge - Wait To Start Lamp Circuit Condition
P1399 Dodge Code - Wait To Start Lamp Circuit Condition

Common Causes of P1399 Dodge

  1. Faulty glow plug relay or control module.
  2. Damaged wiring or connectors in the wait to start lamp circuit.
  3. Malfunctioning glow plugs.
  4. Corrosion or poor connections in the electrical system.
  5. Issues with the engine control module (ECM) affecting the glow plug operation.

Symptoms of P1399 Dodge

  1. Difficulty starting the vehicle, especially in cold weather.
  2. Extended cranking times before the engine starts.
  3. The wait to start lamp on the dashboard not illuminating.
  4. Rough idling or poor engine performance after starting.

How to Fix P1399 Dodge

  1. Begin by conducting a thorough inspection of the wait to start lamp circuit, checking for any visible damage to wiring or connectors.
  2. Test the glow plug relay and control module to determine if they are functioning correctly. Replace any faulty components as needed.
  3. Verify the operation of the glow plugs by testing them individually for proper resistance and functionality.
  4. Clear the diagnostic trouble code using a scan tool and monitor the wait to start lamp circuit for any recurring issues.
  5. Test drive the vehicle to ensure that the starting process is smooth and the wait to start lamp functions as intended.

Cost to Fix P1399 Dodge

The cost of repairing a P1399 code related to the Wait To Start Lamp Circuit can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. In general, the parts required for this repair, such as a glow plug relay or control module, can range from $50 to $150. Labor costs typically add up to around $100 to $200, considering the diagnosis time and the actual repair process. Overall, the total repair cost for addressing this code may amount to $150 to $350, but it's advisable to obtain a detailed quote from a local auto repair shop for a more accurate estimate. Keep in mind that rates can differ based on location, vehicle make and model, and the complexity of the repair.

When is the Code Detected?

Key on for two seconds and the Engine Control Module (ECM) detected a fault in the lamp circuit

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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.

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