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P0615 code — how to fix error fast

With the P0615 code, unearth its meaning for a top-notch driving journey.

A hand holding a posis scanner in a car.
A man in a blue jacket smiling in front of a red wall.
Filip Gromovic July 12, 2023 |

One of the most troublesome OBD2 codes is the P0615 code and this one can mean pretty bad things for your car’s starting system. The code often appears in older vehicles, but that doesn’t mean it can’t appear in modern cars as well, which is why understanding the P0615 code meaning is crucial.

Our team of automotive enthusiasts will give you an insight into the code’s potential causes to help you understand the reasons why the code may be triggered. Also, we’ll go over the diagnostic methods and possible fixes to help you get to the bottom of this code and restore balance to your car’s starting system.

Why you can trust REREV’s OBD2 code advice: Our automotive expert researchers with experienced mechanics undertakes a thorough research methodology to deliver precise insights on OBD codes. Find out more about OBD2 codes research process..

What does the P0615 code mean?

The P0615 code stands for “Starter Relay Circuit.” It is a generic powertrain code that is used by all car manufacturers. When this code appears, it means that there is a problem with the starter relay circuit.

This circuit is responsible for sending power to the starter motor when you turn the key in the ignition. If the starter relay circuit is not working properly, your vehicle may not start and you may notice how the engine’s starting process fluctuates in terms of extremely low RPM and difficulties getting the engine to crank.

What causes the P0615 code?

Among the many reasons that could trigger this code, the faulty starter motor relay circuit seems like the most probable option. However, it’s important to nonetheless realize all the other possible reasons behind the code, so here’s a complete overview:

Faulty starter relay

The starter relay is responsible for sending power to the starter motor. If it is faulty, the starter motor may not receive the power it needs to start the engine. This can cause the P0615 code to appear.

Wiring issues

If there is a problem with the wiring in the starter relay circuit, the P0615 code may appear. This can be caused by damaged or corroded wires, loose connections, or other wiring issues.

Failed starter motor

If the starter motor has failed, it may cause the P0615 code to appear. This can be caused by wear and tear, overheating, or other issues.

Failed engine control module (ECM)

If the engine control module (ECM) has failed, it may cause the P0615 code to appear. The ECM is responsible for controlling the starter relay circuit, so if it is not working properly, the circuit may not function as it should.

Which car models does the P0615 code affect the most?

Generally, older vehicles are more prone to this issue, as the starter relay circuit may become worn or damaged over time. Additionally, vehicles that are used frequently or for long periods of time may also be more likely to experience the P0615 code as the relay of the starter motor may begin to wear off.

Either way, our team scoured the reports to bring you all the car models that are more exposed to this code than others:

  • Chevy Silverado: The Silverado is a popular full-size pickup truck that has been reported to have problems with the starter relay circuit, leading to the P0615 code.
  • Honda Civic:: This compact car has also been known to encounter problems with the starter relay circuit, which can trigger the P0615 code.
  • Toyota Camry: The Camry is a reliable mid-size sedan that has occasionally experienced issues with the starter relay circuit, causing the P0615 code to appear.

How to diagnose the P0615 code

To diagnose the P0615 code, you will need to use a diagnostic scanner. This scanner will read the code and provide information about the cause of the issue. Additionally, you may need to perform some tests to determine the cause of the problem. so here are some diagnostic methods to consider:

Visual inspection

Start by visually inspecting the starter relay circuit. You should look for any signs of damage or wear, such as frayed wires, corroded connections, or loose connections.

Ohmmeter test

Use an ohmmeter to test the resistance of the starter relay circuit. This will help you determine if there are any issues with the wiring or connections in the circuit.

Voltage drop test

Perform a voltage drop test to check for voltage drops in the starter relay circuit. This will help you determine if there are any issues with the power supply to the circuit.

How to fix the P0615 code

Once you have diagnosed the cause of the P0615 code, you can begin to fix the issue. Here are some potential fixes for each cause of the code:

Faulty starter relay

If the starter relay is faulty, it will need to be replaced. This is a relatively simple fix that can be done by a professional mechanic or by a knowledgeable car owner.

Wiring issues

If there are issues with the wiring in the starter relay circuit, the damaged or corroded wires will need to be replaced. Additionally, loose connections will need to be tightened or repaired.

Failed starter motor

If the starter motor has failed, it will need to be replaced. This is a more complex fix that should be done by a professional mechanic.

Failed engine control module (ECM)

If the ECM has failed, it will need to be replaced. This is a more complex fix that should be done by a professional mechanic.

The cost of fixing the P0615 code will vary depending on the cause of the issue and the type of vehicle you own. Generally, replacing the starter relay or repairing wiring issues will be less expensive than replacing the starter motor or ECM.

How to prevent the P0615 code

To prevent the P0615 code from occurring again in the future, it is important to properly maintain your vehicle’s starter relay circuit. This includes:

  • Regularly inspecting the wiring and connections in the circuit
  • Keeping the circuit clean and free of debris
  • Replacing the starter relay as needed
  • Performing routine maintenance on your vehicle, such as oil changes and tune-ups

By following these preventative measures, you can help ensure that your vehicle’s starter relay circuit remains in good condition and that you don’t experience the frustration of the P0615 code again.

Our take

Overall, the code P0615 can lead to severe issues and struggles to start your car and that’s why it needs to be properly addressed. If you don’t act on time, you may end up being stranded in a parking lot without the chance to start your engine, so hopefully, this guide will help prevent that scenario.

What are the symptoms of the P0615 code?

The most common symptom of the P0615 code is difficulty starting the engine. In some cases, the engine may fail to start at all. Other symptoms may include reduced engine power or rough idling.

Can I still drive my car with the P0615 code?

You can’t drive with the code P0615 even if you wanted to overlook the problem with this code since it may affect your car’s starter motor so much that it won’t crank your engine.

How is the P0615 code diagnosed?

To diagnose this code, you can use an OBD-II scanner to read the fault codes stored on your vehicle’s computer, as well as perform a voltage test.

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  • Filip Gromovic
    Filip Gromovic

    Filip is a lifelong car enthusiast with over 3 years of experience writing about cars and had worked as a mechanic apprentice for over 5 years, gaining hands-on expertise in automotive mechanics. At REREV, he combines his passion for cars with his comprehensive knowledge to provide readers with a unique blend of technical insight and engaging storytelling that sets the bar high for automotive content.

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