How to Diagnose and Solve P1520 Electric Current Circuit Malfunction Issues

Introduction

Are you a car enthusiast who loves to get your hands dirty? Or perhaps you’re a DIYer who enjoys the satisfaction of fixing things yourself? If so, you’re in the right place. Today, we’re going to delve into the world of car diagnostics, specifically focusing on the P1520 Electric Current Circuit Malfunction.

Understanding the P1520 Electric Current Circuit Malfunction

Before we dive into the nitty-gritty of diagnosing and solving this issue, let’s first understand what it is. The P1520 Electric Current Circuit Malfunction is a generic powertrain code related to the vehicle’s speed, idle control, and auxiliary inputs. It indicates that the engine control module (ECM) has detected a problem with the electrical current circuit.

What Causes the P1520 Electric Current Circuit Malfunction?

Several factors can trigger this malfunction. These include a faulty idle air control (IAC) valve, damaged wiring or connectors, a malfunctioning ECM, or a defective intake air temperature (IAT) sensor.

Diagnosing the P1520 Electric Current Circuit Malfunction

Now that we’ve understood what the P1520 Electric Current Circuit Malfunction is and what causes it, let’s move on to diagnosing it.

Step 1: Visual Inspection

Start by visually inspecting the wiring and connectors related to the IAC valve and IAT sensor. Look for signs of damage, corrosion, or loose connections.

Step 2: Use a Diagnostic Scanner

Next, use a diagnostic scanner to read the trouble codes stored in the ECM. This will help you identify any additional issues that might be contributing to the malfunction.

Step 3: Test the IAC Valve and IAT Sensor

Using a digital multimeter, test the IAC valve and IAT sensor for proper operation. If either of these components is faulty, it will need to be replaced.

Solving the P1520 Electric Current Circuit Malfunction

Once you’ve diagnosed the problem, it’s time to fix it. Here’s how:

Step 1: Replace Damaged Wiring or Connectors

If you found any damaged wiring or connectors during your visual inspection, replace them.

Step 2: Replace the IAC Valve or IAT Sensor

If your tests revealed a faulty IAC valve or IAT sensor, replace the defective component.

Step 3: Reset the ECM

After making the necessary repairs, reset the ECM to clear the P1520 code. You can do this using a diagnostic scanner.

Conclusion

Fixing a P1520 Electric Current Circuit Malfunction might seem daunting, but with the right tools and a bit of patience, it’s a task you can tackle yourself. Remember, the key to successful DIY car repair is understanding the problem, diagnosing it correctly, and making the necessary repairs. Happy fixing!

FAQs

1. What is a P1520 Electric Current Circuit Malfunction?

It’s a generic powertrain code indicating that the ECM has detected a problem with the electrical current circuit.

2. What causes a P1520 Electric Current Circuit Malfunction?

This malfunction can be caused by a faulty IAC valve, damaged wiring or connectors, a malfunctioning ECM, or a defective IAT sensor.

3. How do I fix a P1520 Electric Current Circuit Malfunction?

Fixing this issue involves diagnosing the problem, which can include a visual inspection, using a diagnostic scanner, and testing the IAC valve and IAT sensor. Once the problem is identified, you’ll need to make the necessary repairs, which can include replacing damaged wiring or connectors and replacing a faulty IAC valve or IAT sensor. Finally, you’ll need to reset the ECM to clear the code.