P1711 Not in P or N During KOEO / KOER

How to Diagnose and Solve P1711 Not in P or N During KOEO / KOER Issues

As a seasoned car expert, I understand the frustration that comes with encountering a P1711 error code. This code signifies that your vehicle is not in Park or Neutral during Key On Engine Off (KOEO) or Key On Engine Running (KOER) tests. But don’t worry, I’m here to help you diagnose and solve this issue.

Understanding the P1711 Error Code

Before we dive into the solution, it’s crucial to understand what the P1711 error code means. This code is a generic powertrain code related to the transmission, including sensor failures and pressure faults. It’s triggered when the Powertrain Control Module (PCM) detects that the transmission is not in Park or Neutral during KOEO or KOER self-tests.

Signs of a P1711 Error Code

Identifying a P1711 error code can be straightforward if you know what to look for. Some common symptoms include:

– The check engine light is on
– The vehicle is unable to start
– The vehicle is stuck in a specific gear
– The vehicle’s performance is reduced

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Diagnosing a P1711 Error Code

Now that we’ve understood the P1711 error code, let’s move on to diagnosing it.

Step 1: Use an OBD-II Scanner

The first step in diagnosing a P1711 error code is to use an On-Board Diagnostic II (OBD-II) scanner. This tool will read the code and provide you with a detailed explanation of the problem.

Step 2: Inspect the Transmission Range Sensor

Next, inspect the Transmission Range Sensor (TRS). This sensor informs the PCM about the gear the vehicle is in. If it’s faulty, it could be the cause of the P1711 error code.

Step 3: Check the Wiring and Connectors

Inspect the wiring and connectors leading to the TRS. Look for any signs of damage, corrosion, or loose connections.

Solving a P1711 Error Code

After diagnosing the problem, it’s time to solve it. Here’s how:

Step 1: Replace the TRS

If the TRS is faulty, replace it. This is a relatively simple process that involves removing the old sensor and installing a new one.

Step 2: Repair or Replace Damaged Wiring

If you find any damaged wiring or connectors, repair or replace them. This will ensure that the TRS can communicate effectively with the PCM.

Step 3: Clear the Error Code

After making the necessary repairs, use the OBD-II scanner to clear the error code. Then, start the vehicle and check if the check engine light comes back on. If it doesn’t, you’ve successfully solved the P1711 error code.


Dealing with a P1711 error code can be a daunting task, but with the right knowledge and tools, you can diagnose and solve this issue yourself. Remember, it’s crucial to address this problem as soon as possible to prevent further damage to your vehicle.


1. What does a P1711 error code mean?

A P1711 error code means that the vehicle is not in Park or Neutral during KOEO or KOER self-tests.

2. How can I diagnose a P1711 error code?

You can diagnose a P1711 error code by using an OBD-II scanner and inspecting the TRS and the wiring and connectors leading to it.

3. How can I solve a P1711 error code?

You can solve a P1711 error code by replacing the faulty TRS, repairing or replacing damaged wiring or connectors, and clearing the error code using an OBD-II scanner.