P1579 Throttle Position Sensor Disagreement btwn Sensors

How to Diagnose and Solve P1579 Throttle Position Sensor Disagreement Between Sensors Issues


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 P1579 Throttle Position Sensor Disagreement Between Sensors issue.

Understanding the P1579 Code

Before we dive into the solution, let’s first understand what the P1579 code means. This code is triggered when the Powertrain Control Module (PCM) detects a disagreement between the throttle position sensors. But what does this mean? In simple terms, your car’s throttle position sensors are not in sync, which can lead to a range of performance issues.

Signs of a P1579 Throttle Position Sensor Issue

How do you know if your car is suffering from this issue? Here are some common signs:

1. Check Engine Light: This is usually the first sign. If your check engine light is on, it’s time to investigate.
2. Poor Fuel Economy: If you’re filling up more often than usual, it could be due to a faulty throttle position sensor.
3. Rough Idle: Your car may idle roughly or stall when at a stop.
4. Poor Acceleration: You may notice a lack of power when accelerating.

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Diagnosing the P1579 Code

Now that we know the signs, let’s move on to diagnosing the issue. Here’s a step-by-step guide:

Step 1: Use an OBD-II Scanner

The first step in diagnosing a P1579 code is to use an OBD-II scanner. This device can read the trouble codes stored in your car’s computer and help you identify the problem.

Step 2: Inspect the Throttle Position Sensors

Next, inspect the throttle position sensors. Look for signs of damage or wear. If they appear to be in poor condition, they may need to be replaced.

Step 3: Test the Sensors

If the sensors look fine, the next step is to test them. This can be done using a multimeter. If the readings are outside the manufacturer’s specifications, the sensors are likely faulty.

Solving the P1579 Throttle Position Sensor Issue

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

Step 1: Replace the Faulty Sensors

If the sensors are faulty, they will need to be replaced. This is a relatively straightforward process that can be done with basic tools.

Step 2: Reset the PCM

After replacing the sensors, you’ll need to reset the PCM. This can be done using an OBD-II scanner.

Step 3: Test Drive

Finally, take your car for a test drive to ensure the problem has been resolved. If the check engine light stays off and your car performs well, you’ve successfully solved the P1579 issue!


Fixing a P1579 Throttle Position Sensor Disagreement Between Sensors issue may seem daunting, but with a little patience and the right tools, it’s a task that can be tackled by any DIY enthusiast. Remember, the key is to diagnose the problem accurately before attempting to fix it. Happy fixing!


1. What is a throttle position sensor?
A throttle position sensor is a sensor used to monitor the throttle position of a vehicle. It sends data to the vehicle’s computer, which uses it to regulate fuel delivery and ignition timing.

2. What causes a P1579 code?
A P1579 code is typically caused by a disagreement between the throttle position sensors. This can be due to faulty sensors, wiring issues, or a malfunctioning PCM.

3. Can I drive with a P1579 code?
While it may be possible to drive with a P1579 code, it’s not recommended. This issue can lead to poor performance and decreased fuel efficiency. It’s best to address the problem as soon as possible.