P1574 code — how to fix error fast

If you happen to retrieve the code P1574 after a diagnostic scan of your car, it can mean bad things for your vehicle’s key system and components. We know how intimidating that may sound, but that fear factor and not knowing the P1574 code meaning should only motivate you to learn about the issue and fix it as soon as possible.

As this is easier said than done, we’ll do our best to get you on the right path. This guide was made by our experts to help you figure out the potential cause of the code in your car, as well; as properly determine it so you can apply an effective solution that we’ll also discuss, so let’s dig in.

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What does the P1574 code mean?

The P1574 code stands for “Throttle Control Actuator Malfunction.” This code appears when there is a problem with the throttle control actuator, which is responsible for controlling the engine’s throttle opening. When the throttle control actuator malfunctions, the engine’s performance may be affected, and the car may not run smoothly.

The code may also cause other issues, such as poor fuel economy and increased emissions. However, the code can not only affect your car’s gas emissions, but it can also affect the idling RPM, engine performance when overtaking, or even cause misfires within the engine’s cylinders.

What causes the P1574 code?

While knowing the root cause of the throttle control system malfunction sounds promising in terms of fixing this code, things may not seem so bright. The main problem is – there are numerous reasons that could potentially be causing this code, so it’s essential to get to know every single one of these:

Failed throttle control actuator

A failed throttle control actuator is one of the most common causes of the P1574 code. Over time, the actuator may wear out or become damaged, leading to a malfunction.

Wiring issues

Wiring issues can also cause the P1574 code to appear on the dashboard. Damaged or corroded wiring can prevent the throttle control actuator from functioning correctly.

Failed PCM

A failed Powertrain Control Module (PCM) can also cause the P1574 code to appear. The PCM is responsible for controlling the engine’s throttle opening, and a malfunction can lead to issues with the throttle control actuator.

Failed accelerator pedal position sensor

The Accelerator Pedal Position Sensor (APPS) is responsible for sending signals to the PCM to control the throttle opening and a malfunction in this system often leads to this bothersome code.

Failed throttle position sensor

The Throttle Position Sensor (TPS) is responsible for monitoring the throttle’s position and sending signals to the PCM to control the engine’s throttle opening. A malfunctioning TPS can cause the code to trigger.

Which car models does the P1574 code affect the most?

While this code can potentially impact any car model with an electronic speed control system, there are some models that are more likely to be affected than others.

Here are some car models that have been reported to experience issues related to the P1574 code:

• Nissan Sentra: The Nissan Sentra is a model that has been known to experience issues related to the code. This is typically caused by a malfunctioning throttle body.
• Infiniti G35: The Infiniti G35 is a luxury sports sedan that has also been reported to have issues with the P1574 code. This is often caused by a faulty accelerator pedal position sensor.
• Ford Escape: The Ford Escape is an SUV that has been known to experience issues related to the code. This is typically caused by a faulty throttle body or accelerator pedal position sensor.

How to diagnose the P1574 code

Diagnosing the P1574 code requires specialized tools and equipment, but there are some things you can do even without the help of a mechanic to fix this code. Here are some of the main tests that you can perform to figure out why the code appeared in your car:

Scan the car’s computer

The first step in diagnosing the P1574 code is to scan the car’s computer using an OBD-II scanner. The scanner will read the code and provide information on the possible causes of the issue.

Inspect the throttle control actuator

Inspect the throttle control actuator for any signs of damage or wear. Check for any loose connections or corroded wiring.

Test the throttle position sensor

Use a multimeter to test the Throttle Position Sensor’s voltage and resistance. Compare the readings to the manufacturer’s specifications to determine if the TPS is functioning correctly.

How to fix the P1574 code

Fixing the P1574 code requires replacing the faulty part or repairing the damaged wiring. So, now that you know a bit more on possible causes, it’s time to get to work and get your hands dirty by using one of the following fixing methods:

Replace the throttle control actuator

If the throttle control actuator is faulty, it will need to be replaced to fix the code. If you manage to do this, the throttle input will once again be properly controlled and the ait intake manifold won’t be stuck so you can keep driving regularly and remove the code.

Repair the wiring

Repairing corroded or damaged wiring is the easiest way of fixing this code and it shouldn’t cost more than $100 to $150 in most cases. However, it sometimes takes having a trusted mechanic working on your car to repair this issue, so don’t tamper with the wiring if you don’t have much prior experience.

Replace the PCM

If a faulty PCM is causing the code, things may get a bit more difficult. You can always try resetting the module by disconnecting the negative terminal of the battery and waiting for it to reload OEM readings, but if that doesn’t work, you’ll be looking at a repair bill in the range of $500 to $1500.

Replace the APPS

If the Accelerator Pedal Position Sensor is faulty, it will need to be replaced. The cost of the replacement will depend on the car model and the mechanic’s labor rates.

How to Prevent the P1574 Code

Preventing the P1574 code requires proper maintenance of your vehicle. There are some steps you can take to prevent this code that is also commonly used in preserving your car’s air intake system and throttle response overall, so here’s what you can do:

• Regularly replace the air filter
• Keep the throttle body clean
• Check the air intake manifold for any damage

It’s also essential to have your car serviced regularly by a professional mechanic to catch any potential issues before they become major problems.

Our take

Ultimately, the code P1574 can get pretty messy if you don’t act on time to repair it. Now that you know more about the code’s main triggering reasons and how it affects the throttle response input, you can make use of the advice from our team of experts to repair the issue and remove it in the long run.