U0164 - DTC U0164 - Lost Communication with Body Control Module (BCM) - Common in 2013-2017 Ford Focus

Quick Answer

U0164 means: U0164 indicates a communication failure between the Engine Control Module and the Body Control Module.

Fix: Check and replace faulty components Cost: $300 - $700 Time: 90-180 minutes

Can I drive with U0164? Immediate attention recommended to prevent further electrical issues.

Common Questions

What does U0164 mean and how does it affect my car?

The U0164 code refers to a lost communication between your vehicle's Engine Control Module and Body Control Module. This issue can lead to various electrical problems, such as malfunctioning lights, power windows not working, or the engine not starting. It's important to address this code quickly to prevent further electrical system issues.

What are the most common causes of U0164 and how much does it cost to fix?

Common causes of the U0164 code include a faulty Body Control Module, wiring issues, or a software malfunction. Repair costs can range from $100 for wiring repairs to $700 for BCM replacement, depending on the severity of the issue.

Can I drive my car with U0164 or should I stop immediately?

While it might be possible to drive with the U0164 code, it is not advisable. The communication failure can lead to safety issues, such as inoperable lights or windows. It's best to seek immediate diagnosis and repair.

How can I diagnose U0164 myself using GeekOBD APP?

To diagnose U0164 using the GeekOBD APP, start by connecting the app to your vehicle's OBD2 port. Scan for codes and note any additional trouble codes that appear alongside U0164 to get a clearer picture of the issue. Look for freeze frame data to understand the conditions under which the code triggered.

What vehicles are most commonly affected by U0164?

The U0164 code is commonly found in vehicles like the 2013-2017 Ford Focus, as well as other models from Ford within that range. It's a good idea to check for any recalls or technical service bulletins related to the BCM for these vehicles.

How can I prevent U0164 from happening again?

To prevent the U0164 code from recurring, regularly inspect your vehicle's wiring for damage, ensure proper connections, and keep your software up to date. Routine maintenance checks can help catch potential issues early.

What is U0164?

The DTC U0164 code refers to a communication issue between the vehicle's Engine Control Module (ECM) and the Body Control Module (BCM). This code indicates that there is a problem with the data exchange between these critical components, which can lead to various issues affecting the vehicle's performance and electrical systems. The BCM is responsible for controlling many functions, including lighting, power windows, and security systems, so a failure in communication can cause these systems to malfunction. Drivers may notice symptoms such as malfunctioning lights, inoperable power windows, or the vehicle not starting at all. It's important to address this code promptly, as unresolved communication issues can lead to further complications in the vehicle's electrical system, and may result in expensive repairs down the line. Proper diagnosis using tools like the GeekOBD APP can help pinpoint the exact issue, whether it's a faulty BCM, wiring issues, or a problem with the ECM itself.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0164 is present:

The check engine light may illuminate, indicating a fault that needs to be addressed.
Power windows may not operate, leaving the driver unable to control window functions.
Exterior or interior lights may malfunction, either staying on or not functioning at all, creating safety concerns.
The vehicle may experience starting issues, where the engine fails to start or takes longer than normal to crank.
Other electrical components such as the radio or dashboard lights may behave erratically.

Possible Causes

Most common causes of U0164 (ordered by frequency):

{'cause': 'Faulty Body Control Module (BCM)', 'likelihood': '40%', 'details': 'A damaged or defective BCM can prevent proper communication with the ECM, leading to the U0164 code.'}
{'cause': 'Wiring Issues', 'details': 'Corroded, damaged, or loose wiring connections can disrupt communication between the BCM and ECM, causing the code to trigger.'}
{'cause': 'Software Malfunction', 'details': 'An outdated or corrupt software version in the BCM can lead to communication failures, which can often be resolved through a firmware update.'}
{'cause': 'Faulty ECM', 'details': 'In rare cases, a malfunctioning ECM can be at fault, which is more serious and requires extensive diagnostic work.'}
{'cause': 'Aftermarket Modifications', 'details': 'Installation of aftermarket electrical components can interfere with the original wiring and communication signals, causing this code to appear.'}

U0164 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

Replacing the Body Control Module if it is deemed faulty after testing.

Total: $300 - $700
Success rate: 85%

Wiring Repair

Repairing or replacing damaged wiring connections that affect communication.

Total: $100 - $300
Success rate: 90%

Software Update

Updating the BCM software to resolve potential bugs or glitches.

Total: $50 - $150
Success rate: 80%

Money-Saving Tips for U0164

Start with the most common and least expensive repairs first
Use GeekOBD APP to confirm diagnosis before replacing expensive parts
Consider preventive maintenance to avoid future occurrences
Compare prices for OEM vs aftermarket parts based on your needs
Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional U0164 Diagnosis Process

Follow these systematic steps to accurately diagnose U0164. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).