P1585 Electronic Throttle Monitor PCM Override

How to Diagnose and Solve P1585 Electronic Throttle Monitor PCM Override Issues

As a car enthusiast, there’s nothing more satisfying than rolling up your sleeves and getting down to some good old DIY car maintenance. Today, we’re going to tackle a common issue that many car owners face – the P1585 Electronic Throttle Monitor PCM Override issue.

Understanding the P1585 Code

Before we dive into the solution, let’s first understand what the P1585 code means. This code is triggered when the Powertrain Control Module (PCM) detects a problem with the electronic throttle control system. This could be due to a variety of reasons, such as a faulty throttle position sensor, a malfunctioning PCM, or even a simple wiring issue.

Signs of a P1585 Issue

How do you know if your car is suffering from a P1585 issue? Here are some common symptoms:

– The check engine light is on
– The car’s performance is reduced
– The engine stalls or has difficulty starting
– The car goes into “limp mode”

car vertical

Diagnosing the P1585 Issue

Now that we know what to look out for, let’s move on to diagnosing the problem.

Step 1: Check the Throttle Position Sensor

The first step is to check the throttle position sensor. This sensor monitors the position of the throttle and sends this information to the PCM. If it’s faulty, it could be sending incorrect information, triggering the P1585 code.

Step 2: Inspect the Wiring

Next, inspect the wiring connected to the throttle position sensor and the PCM. Look for any signs of damage, such as frayed wires or loose connections.

Step 3: Test the PCM

Finally, test the PCM. This is the brain of your car, controlling various aspects of your vehicle’s performance. If it’s malfunctioning, it could be the cause of the P1585 issue.

Solving the P1585 Issue

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

Step 1: Replace the Throttle Position Sensor

If the throttle position sensor is faulty, replace it. This is a relatively simple task that can be done with basic tools.

Step 2: Repair the Wiring

If the wiring is damaged, repair or replace it. This might require a bit more technical knowledge, but with patience and the right tools, it’s doable.

Step 3: Replace the PCM

If the PCM is the problem, it will need to be replaced. This is a more complex task and might require professional help.

Preventing Future P1585 Issues

To prevent future P1585 issues, regular maintenance is key. Regularly check your car’s wiring and sensors, and address any issues immediately.


Dealing with a P1585 Electronic Throttle Monitor PCM Override issue might seem daunting, but with a bit of knowledge and some elbow grease, it’s a problem that can be solved. Remember, regular maintenance is key to preventing such issues in the future.


1. What does the P1585 code mean?

The P1585 code is triggered when the PCM detects a problem with the electronic throttle control system.

2. How can I prevent future P1585 issues?

Regular maintenance, including checking your car’s wiring and sensors, can help prevent future P1585 issues.

3. Do I need professional help to solve a P1585 issue?

While some tasks, like replacing the throttle position sensor, can be done at home, others, like replacing the PCM, might require professional help.