P1464 Ford Code: A Guide To Handling AC System Issues

You’re driving your Ford when suddenly, the check engine light switches on. Wondering what’s up, then decide to run some tests. By using a scan tool, you perform the Key On Engine Off (KOEO) and Key On Engine Running (KOER) tests, which check the engine’s parts. Looking at the results show that the AC voltage isn’t normal. This is what triggers the P1464 code to be set.

In this article, we will explain what the P1464 code means, what are its symptoms and causes, and how to fix it.

Let’s get started!

P1464 Ford: A Quick Overview

Below is a summary of the P1464 Ford code. Check it out.

  • Definition: Air Conditioning Demand Out Of Self Test Range
  • Severity: Low
  • DIY Skill Level: Intermediate
  • Continue To Drive?: Yes
  • Estimated Repair Cost: $10 – $150

What Does The P1464 Code Mean On Ford?

The P1464 code on Ford is possibly set when the A/C or defroster is activated while performing the Key On Engine Off (KOEO) or Key On Engine Running (KOER) self-test. Besides, there is one more case for the P1464 is when the Powertrain Control Module (PCM) detects a high ACCS input during the self-test process.

In case you want to know more about self-test processes. Here is the answer – KOEO and KOER are self-tests that can be performed with a scan tool to check the sensors and actuators of the engine. KOEO, which means the test is done when the ignition switch is turned to the ON position and the engine is stopped. KOER, which means the test is done when the engine is running at normal operating temperature. These tests can help diagnose problems and report trouble codes.

Ford A/C control
The AC system will not operate properly when P1464 is triggered.
(Image credit: mavericktruckclub.com)

How Serious Is The P1464 Ford Code?

The P1464 DTC code’s severity is generally low, and it typically doesn’t impact immediate driveability or safety in Ford vehicles. While it relates to the AC system‘s self-test process, it doesn’t affect critical vehicle functions. 

So can you are able to continue to drive with this code? The answer is YES. However, addressing the issue promptly is advised to prevent potential long-term AC problems and maintain optimal comfort.

What Are The Symptoms Of P1464 Code On Your Ford?

Identifying the P1464 code’s presence can be crucial in addressing potential AC system issues. Here are the key symptoms associated with this DTC:

Read more: Complete List Of Ford OBD2 Codes for FREE Download

What Are The P1464 Ford Code’s Potential Causes?

Let’s explore the common causes behind this P1464 Ford code:

  • A/C or defrost on during self-test
  • A/CCS circuit short to voltage
  • Faulty A/C demand switch
  • Damaged Wide Open Throttle A/C Cutoff (WAC) relay

Note: If the A/C or defrost functions were active during the self-test, it’s recommended to deactivate them and then repeat the self-test process.

How To Diagnose And Fix The P1464 Ford Code?

In this section, I will guide you through the process of addressing the issue, along with detailing the necessary tools and parts required for the task.

Essential Tools And Parts

To address the P1464 DTC code in your Ford vehicle’s AC system, you might need the following tools and parts:

Fixing Nissan P1464: Step-by-step Procedure

Resolving the P1464 DTC code in your Ford vehicle involves a systematic approach to identifying and addressing the underlying issue. Here’s a step-by-step guide on how to fix this code:

Step 1: Turn off A/C and defrost

If the air conditioning (A/C) or defrost functions were active during the self-test when the code was triggered, start by turning them off.

Step 2: Rerun the self-test

After disabling the A/C and defrost, rerun the self-test procedure. This can sometimes reset the system and clear the code if it was triggered due to temporary conditions.

Step 3: Inspect wiring and connectors

Inspect the wiring and connectors associated with both the A/C demand switch and the A/C control module, searching for indications of damage, corrosion, or connections that have become loose.

Step 4: Test the A/C demand switch

Using specialized equipment, test the A/C demand switch’s readings to ensure they are within the expected range. Replace the sensor if it’s providing inaccurate readings.

Step 5: Check WAC Relay Harness

Examine the wiring harness of the WAC relay for any signs of damage. Repair or replace the harness as needed.

Step 6: Clear the Code

After making necessary repairs, use an OBD-II scanner to clear the P1464 code from the vehicle’s memory. This step will also reset the check engine light.

Step 7: Test Drive

Take your vehicle for a test drive to ensure the code doesn’t reappear and that the A/C system is operating smoothly.

Read more: P1131 Ford: Symptoms, Causes, and How to Fix

Estimated Cost For Fixing P1464 On Ford Vehicles

If you’re not confident in your DIY skills or if the tasks involved seem challenging, it’s important to consider seeking the expertise of a professional mechanic. Complex automotive systems require precision and experience to diagnose and fix effectively. Attempting tasks beyond your comfort level could lead to further issues or safety concerns. Your safety and the optimal functioning of your vehicle are paramount, so if in doubt, don’t hesitate to consult a skilled professional who can handle the task with confidence.

Here’s a general breakdown of estimated costs for the outlined repairs. Please note that these figures are rough estimates and the actual expenses may fluctuate based on a range of factors.

Repair TaskEstimated Cost
Wiring and Connectors Repair$50 to $100
A/C Demand Switch Replacement$20 to $100
Throttle A/C Cutoff Relay Fixing$10 to $50

P1464 Ford Infographic

p1464 nissan code infographic
Check this infographic for the summarized information about this P1464 code on Ford vehicles.


With the insights provided in this article, tackling the P1464 DTC in your Ford vehicle’s AC system becomes more manageable. Though the severity is typically low, taking action promptly is advised to prevent potential future issues. Whether you’re a confident DIYer or prefer professional assistance, the outlined steps offer a path to restoring your AC system’s optimal function.

If you found this article useful, consider sharing it with others who might benefit. Feel free to leave your comments below; your experiences and feedback are valuable. Together, we can ensure comfortable and hassle-free journeys in our Ford vehicles.

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