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Engine-Codes – Infiniti – P0615 Infiniti

P0615 Infiniti Code - Start Signal Circuit

Quick Answer

The P0615 Infiniti code refers to a problem in the start signal circuit of the vehicle. Common causes include Faulty ignition switch, Defective starter relay, Wiring issues or loose connections in the start signal circuit. 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
P0615 Infiniti indicates Start Signal Circuit.
Common causes
Common causes include Faulty ignition switch, Defective starter relay, Wiring issues or loose connections in the start signal circuit.
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 07, 2024
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Code P0615 Infiniti Description

The P0615 Infiniti code refers to a problem in the start signal circuit of the vehicle. This code is typically found in vehicles equipped with an electronic throttle control system. The start signal circuit is responsible for sending the signal to the engine control module (ECM) to initiate the starting process when the ignition key is turned. When this circuit malfunctions, it can prevent the engine from starting or cause it to start intermittently.

OBDII Code P0615 Infiniti - Start Signal Circuit
P0615 Infiniti Code - Start Signal Circuit

Common Causes of P0615 Infiniti

  1. Faulty ignition switch
  2. Defective starter relay
  3. Wiring issues or loose connections in the start signal circuit
  4. Malfunctioning engine control module (ECM)
  5. Corrosion or damage to electrical components

Symptoms of P0615 Infiniti

  1. Engine cranks but does not start
  2. Intermittent starting issues
  3. Engine starts but immediately stalls
  4. Check Engine Light is illuminated
  5. Reduced engine performance

How to Fix P0615 Infiniti

  1. Begin by conducting a thorough inspection of the start signal circuit, including the ignition switch, starter relay, and wiring for any signs of damage or corrosion.
  2. Test the components using a multimeter to determine if they are functioning properly.
  3. Replace any faulty components, such as the ignition switch, starter relay, or damaged wiring.
  4. Clear the diagnostic trouble codes from the ECM using a scan tool and perform a test start to ensure the issue has been resolved.
  5. If the problem persists, consult a professional mechanic for further diagnosis and repair.

Cost to Fix P0615 Infiniti

The cost of repairing a P0615 Infiniti code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $150 to $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can range from $80 to $150 per hour. It's recommended to get quotes from multiple shops to compare prices and ensure you are getting a fair estimate for the repair.

When is the Code Detected?

The P0615 codes is detected when park/neutral (PNP) relay (starter relay) is switched “ON” other than at “P” or “N” position. (Or when switched “OFF” at “P” or “N” position).

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Information for Specific Infiniti Models

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 P0615 Infiniti Code

1. What are common symptoms of OBDII code P0615 in an Infiniti related to the Start Signal Circuit?

- Common symptoms include difficulty starting the vehicle, intermittent starting issues, and the engine not cranking or starting at all.

2. What are the possible causes of OBDII code P0615 in an Infiniti?

- The code P0615 in an Infiniti may be caused by a faulty ignition switch, damaged wiring in the start signal circuit, a malfunctioning starter motor, or a failed engine control module (ECM).

3. How can I diagnose the cause of OBDII code P0615 in my Infiniti?

- To diagnose OBDII code P0615, it is recommended to use a diagnostic scanner to retrieve the trouble codes and perform a thorough inspection of the ignition system, wiring, starter motor, and ECM.

4. Can a DIY enthusiast repair OBDII code P0615 in an Infiniti?

- While some simple repairs like checking and cleaning wiring connections can be done by a DIY enthusiast, more complex issues related to the starter motor or ECM may require professional assistance.

5. How can I reset OBDII code P0615 in my Infiniti?

- To reset OBDII code P0615, you can use an OBDII scanner to clear the trouble codes after addressing the underlying issue causing the fault code.

6. Are there any safety precautions to consider when working on OBDII code P0615 in an Infiniti?

- When working on the start signal circuit related to OBDII code P0615, it is essential to disconnect the vehicle's battery and follow proper safety procedures to avoid any electrical hazards.

7. What role does the start signal circuit play in the vehicle's starting process?

- The start signal circuit is responsible for transmitting the start signal from the ignition switch to the starter motor, enabling the engine to crank and start.

8. Can a weak battery or alternator cause OBDII code P0615 in an Infiniti?

- While a weak battery or alternator can contribute to starting issues, OBDII code P0615 is more likely related to specific components in the start signal circuit rather than the overall electrical system.

9. How important is it to address OBDII code P0615 promptly in an Infiniti?

- Addressing OBDII code P0615 promptly is crucial to ensure the proper functioning of the vehicle's starting system and prevent potential issues like stalling or complete engine failure.

10. Is it necessary to visit a dealership for repairs related to OBDII code P0615 in an Infiniti?

- While visiting a dealership is an option, independent auto repair shops with experience in diagnosing and repairing Infiniti vehicles can also effectively address issues related to OBDII code P0615.

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