U0165 - DTC U0165 - Lost Communication with Body Control Module in 2015-2019 Ford F-150 and Other Models

Quick Answer

U0165 means: U0165 indicates a lost communication signal between the engine and body control modules.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with U0165? Immediate attention is recommended to avoid further electrical issues.

Common Questions

What does U0165 mean and how does it affect my car?

The U0165 code indicates that your car's engine control module cannot communicate with the body control module. This can lead to issues like malfunctioning lights, power windows, and even starting problems. If left unaddressed, these issues can escalate, potentially affecting your vehicle's safety and performance.

What are the most common causes of U0165 and how much does it cost to fix?

Common causes of DTC U0165 include faulty wiring (60% likelihood), defective BCM (25%), and software glitches (10%). Repair costs can range from $150 for wiring repairs to $600 for BCM replacement, depending on the issue.

Can I drive my car with U0165, or should I stop immediately?

While it might be possible to drive short distances, it's not advisable to ignore the U0165 code. Malfunctions in critical systems like lights and locks can pose safety risks. It's best to address the issue promptly.

How can I diagnose U0165 myself using GeekOBD APP?

To diagnose U0165 using GeekOBD APP, connect the app to your vehicle's OBD-II port, retrieve the diagnostic trouble codes, and review freeze frame data. This will help you understand the conditions under which the fault occurred, making it easier to pinpoint the issue.

What vehicles are most commonly affected by U0165?

DTC U0165 is frequently reported in 2015-2019 Ford F-150 models, along with other Ford vehicles during the same production years. Always check for any recalls or technical service bulletins (TSBs) related to your specific model.

How can I prevent U0165 from happening again?

Regular maintenance, including electrical system inspections and ensuring that all connections are secure, can help prevent U0165. Additionally, avoid aftermarket modifications that could interfere with the vehicle's electrical systems.

What is U0165?

The diagnostic trouble code (DTC) U0165 indicates that there is a communication issue between the engine control module (ECM) and the body control module (BCM). This can occur in various vehicles, but it has been commonly reported in the 2015-2019 Ford F-150, and other Ford models. When the ECM cannot communicate with the BCM, various essential functions of the vehicle can be disrupted, including lighting, power windows, and door locks. This communication error can lead to multiple symptoms that affect the vehicle's operability and safety. The root causes can range from wiring issues to module failures, which means proper diagnosis is crucial. Ignoring this code can lead to further electrical problems or even safety concerns, as the body control module is integral to the vehicle's electronic systems. Car owners experiencing this code should seek diagnostic assistance promptly to avoid escalating issues.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0165 is present:

Check engine light stays on constantly, indicating a persistent fault that needs attention.
Power windows and door locks may malfunction, leading to inconvenience and potential safety risks.
Instrument cluster may display erratic behavior, such as incorrect gauge readings or warning lights.
Vehicle may have intermittent starting issues, affecting reliability during operation.
The anti-theft system could activate unexpectedly, preventing the vehicle from starting.

Possible Causes

Most common causes of U0165 (ordered by frequency):

{'cause': 'Faulty Wiring or Connectors', 'likelihood': '60%', 'details': 'Corrosion or damage to wiring harnesses and connectors can disrupt communication between modules.'}
{'cause': 'Defective Body Control Module', 'likelihood': '25%', 'details': 'A faulty BCM can fail to send signals to the ECM, leading to lost communication.'}
{'cause': 'Software Glitches', 'likelihood': '10%', 'details': 'Occasionally, outdated software in the control modules can cause communication errors. Regular updates can prevent this.'}
{'cause': 'Intermittent Faults', 'likelihood': '3%', 'details': 'Temporary issues, possibly due to environmental factors like moisture, can cause intermittent communication failures.'}
{'cause': 'Aftermarket Modifications', 'likelihood': '2%', 'details': 'Installation of aftermarket parts that interfere with the electrical system can lead to communication loss.'}

U0165 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing or replacing damaged wiring and connectors to restore communication.

Total: $150 - $300
Success rate: 85%

Body Control Module Replacement

Replacing a faulty BCM with a new or refurbished unit.

Total: $300 - $600
Success rate: 90%

Money-Saving Tips for U0165

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 U0165 Diagnosis Process

Follow these systematic steps to accurately diagnose U0165. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Look for damaged wiring, loose connections, or corrosion around the BCM and ECM (5-10 minutes)

Step 1: Initial visual inspection - Look for damaged wiring, loose connections, or corrosion around the BCM and ECM (5-10 minutes).