C0681 - DTC C0681 - Understanding the Chassis Control Module Communication Error in 2015-2018 Ford F-150 and Similar Models

Quick Answer

C0681 means: C0681 indicates a communication issue between the Powertrain Control Module and the chassis control module.

Fix: Check and replace faulty components Cost: $150 - $400 Time: 90-180 minutes

Can I drive with C0681? Immediate attention is recommended to prevent safety risks.

Common Questions

What does C0681 mean and how does it affect my car?

C0681 indicates a communication issue between your vehicle's Powertrain Control Module and the chassis control module. This can lead to issues like stability control problems, erratic handling, and decreased fuel efficiency. If left unaddressed, it may compromise your vehicle's safety and performance.

What are the most common causes of C0681 and how much does it cost to fix?

Common causes include faulty wiring or connections (60% likelihood), malfunctioning chassis control modules (25%), and corroded connectors (10%). Repair costs can range from $150 for wiring fixes to $1,200 for a module replacement, depending on the issue.

Can I drive my car with C0681 or should I stop immediately?

While you may be able to drive your vehicle, it is unsafe to do so until the issue is diagnosed and repaired. Ignoring C0681 can lead to serious safety risks, like loss of stability control.

How can I diagnose C0681 myself using GeekOBD APP?

Using the GeekOBD APP, connect to your vehicle's OBD2 port and scan for trouble codes. Look for C0681 and check freeze frame data to understand the conditions when the code was triggered. This can help narrow down potential causes.

What vehicles are most commonly affected by C0681?

DTC C0681 is frequently seen in 2015-2018 Ford F-150 models, but can also affect other vehicles with similar chassis control systems. Always check for specific manufacturer recalls or Technical Service Bulletins (TSBs) related to this code.

How can I prevent C0681 from happening again?

Regular maintenance, including checking wiring connections and ensuring clean electrical contacts, can help prevent C0681. Additionally, avoid aftermarket modifications that can interfere with OEM systems.

What is C0681?

DTC C0681 is a diagnostic trouble code indicating a communication issue with the chassis control module in certain vehicles, particularly common in the 2015 to 2018 Ford F-150 models. This code typically signifies that the Powertrain Control Module (PCM) is unable to communicate effectively with the chassis control module, which can lead to various performance and safety concerns. When this code appears, it may affect the vehicle's stability control, traction control, and other essential functions that rely on proper communication between these modules. The implications can range from minor inconveniences, like dashboard warning lights, to more serious issues affecting vehicle handling and safety. Ignoring this code may lead to further complications, such as decreased fuel efficiency or increased wear on drivetrain components. Therefore, diagnosing and addressing the root cause of the C0681 code promptly is critical to maintaining vehicle safety and performance. In most cases, the problem can stem from issues like damaged wiring, faulty connectors, or even a malfunctioning chassis control module itself, making a thorough investigation essential for effective repairs.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C0681 is present:

The check engine light may illuminate, indicating that there is a problem that needs to be addressed.
You might experience erratic vehicle behavior, such as unusual handling or difficulty in acceleration, due to compromised stability control systems.
Drivers may notice a decrease in fuel efficiency, potentially by 10-15%, as the engine struggles to communicate effectively with other systems.
The traction control light may remain on, suggesting that the vehicle's traction control system is not functioning correctly.
In some cases, the vehicle may enter 'limp mode,' where engine power is reduced to prevent further damage.

Possible Causes

Most common causes of C0681 (ordered by frequency):

{'cause': 'Faulty wiring or loose connections (60%)', 'details': 'Damaged wiring harnesses or loose connectors can disrupt communication between modules, a common issue in older vehicles.'}
{'cause': 'Malfunctioning chassis control module (25%)', 'details': 'The chassis control module itself may fail or develop software issues, leading to communication errors.'}
{'cause': 'Corroded connectors (10%)', 'details': 'Corrosion on connectors can cause poor electrical connections, impacting module communication. Regular inspections can help prevent this.'}
{'cause': 'Aftermarket modifications (4%)', 'details': 'Installing aftermarket parts or devices can sometimes interfere with the communication systems of the vehicle.'}
{'cause': 'Rare software glitches (1%)', 'details': 'In some instances, software updates or glitches can lead to temporary communication failures.'}

C0681 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repair or replace damaged wiring and connectors.

Total: $150 - $400
Success rate: 85%

Chassis Control Module Replacement

Replace the faulty chassis control module with a new one.

Total: $500 - $1,200
Success rate: 90%

Money-Saving Tips for C0681

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 C0681 Diagnosis Process

Follow these systematic steps to accurately diagnose C0681. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1

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