How to Diagnose and Solve P1626 Control Module Long Term Memory Performance/ Immobilizer Code Words Do Not Match 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 P1626 Control Module Long Term Memory Performance/ Immobilizer Code Words Do Not Match issue.

Understanding the P1626 Code

First things first, let’s understand what the P1626 code means. This code is triggered when the Engine Control Module (ECM) detects a discrepancy between the immobilizer key and the ECM. In simpler terms, the car’s security system doesn’t recognize the key, causing the engine to stall or not start at all.

Common Symptoms

The most common symptom of the P1626 code is the engine not starting or stalling abruptly. You may also notice the security light flashing on your dashboard.

Diagnosing the P1626 Code

Now that we know what the P1626 code means and its symptoms, let’s move on to diagnosing the issue.

Step 1: Use an OBD-II Scanner

The first step in diagnosing the P1626 code is to use an OBD-II scanner. This device will read the trouble codes stored in your car’s computer and help you identify the problem.

Step 2: Inspect the Ignition Key and Lock Cylinder

Next, inspect the ignition key and lock cylinder. If they are worn out or damaged, they may not be able to communicate properly with the ECM, triggering the P1626 code.

Step 3: Check the Wiring and Connectors

Check the wiring and connectors between the ECM and the immobilizer control module. If they are corroded, damaged, or loose, they could be causing the problem.

Solving the P1626 Code

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

Step 1: Replace the Ignition Key or Lock Cylinder

If the ignition key or lock cylinder is damaged, replace it. This should solve the problem if the key or cylinder was the cause.

Step 2: Repair or Replace Damaged Wiring or Connectors

If the wiring or connectors are damaged, repair or replace them. This should restore proper communication between the ECM and the immobilizer control module.

Step 3: Reset the ECM

Finally, reset the ECM using your OBD-II scanner. This will clear the P1626 code and allow the ECM to relearn the immobilizer key.

Conclusion

Fixing the P1626 Control Module Long Term Memory Performance/ Immobilizer Code Words Do Not Match issue may seem daunting, but with a little patience and the right tools, you can do it yourself. Remember, the key to successful DIY car repair is understanding the problem and taking a systematic approach to diagnosing and solving it.

FAQs

1. What is the P1626 code?
The P1626 code is triggered when the ECM detects a discrepancy between the immobilizer key and the ECM.

2. What are the symptoms of the P1626 code?
The most common symptom is the engine not starting or stalling abruptly. You may also notice the security light flashing on your dashboard.

3. How do I fix the P1626 code?
To fix the P1626 code, you need to diagnose the problem using an OBD-II scanner, inspect the ignition key and lock cylinder, and check the wiring and connectors. Once you’ve identified the problem, you can solve it by replacing the damaged parts and resetting the ECM.