2024 Ford F-150 ABS Codes with No Check Engine Light? Here’s the Real Fix
If you’ve ever scanned a newer truck and found a handful of codes—but no warning lights and no symptoms—you know how confusing that can be. This is especially true on modern vehicles where modules are constantly talking to each other.
In this case, we’re looking at a 2024 Ford F-150 that showed multiple fault codes across different systems, yet drove perfectly fine. No check engine light, no ABS light, no drivability complaints.
So what’s going on here?
Let’s walk through this step-by-step, just like I would in the shop, and break down how to properly approach diagnosing car problems like this without wasting time or replacing good parts.
Vehicle Overview
This vehicle is a 2024 Ford F-150 2.7L EcoBoost with approximately 1,500 miles. That’s an important detail right from the start.
Low mileage vehicles—especially newer ones—often behave differently than high-mileage cars when it comes to automotive troubleshooting. Many issues aren’t mechanical failures, but rather electronic or environmental events.
Vehicle Concern
The truck came in with no warning lights, no noticeable symptoms, and no complaints from the driver.
However, during a scan of all modules, several diagnostic trouble codes were found stored across multiple systems.
This is where a lot of technicians and DIYers make a mistake—they see multiple codes and immediately assume multiple failures.
That’s not how modern vehicles work.
Initial Inspection & Observations
Right away, a few things stood out:
The vehicle had extremely low mileage for its age. That suggests it likely sat for extended periods—possibly on a dealer lot or in storage.
Battery voltage on startup and module wake-up becomes very important in these situations.
There were no warning lights active on the dash. That tells us the faults were not currently affecting emissions or safety systems enough to trigger a light.
The truck drove normally with no abnormal behavior.
Those observations are critical when diagnosing car problems. You always want to match the data with real-world symptoms.
Diagnostic Trouble Codes
The scan revealed the following key codes:
C0037 – Left Rear Wheel Speed Sensor
C003A – Right Rear Wheel Speed Sensor
U0415 – Invalid Data Received from ABS Module (present in multiple modules)
B1385 – Lane Keeping Aid System
Now here’s where experience matters.
At first glance, it might look like:
Two bad wheel speed sensors
A faulty ABS module
Lane assist issues
But that would be the wrong conclusion.
The U0415 codes are especially important. These indicate that other modules are receiving bad or implausible data from the ABS system.
That means the ABS module is the source, and everything else is reacting to it.
Step-by-Step Diagnostic Process
This is where real automotive troubleshooting comes into play.
Step 1: Verify Sensor Operation
Instead of jumping straight into replacing parts, I went into live data and monitored all four wheel speed sensors.
I slowly drove the vehicle across the shop floor and watched the readings.
Both rear sensors:
Responded correctly
Increased with vehicle speed
Showed no dropouts
That tells us immediately:
The sensors are working. The circuits are intact. The system is capable of producing valid data.
That eliminates a large chunk of potential failures.
Step 2: Understand the Code Type
The codes had subtypes indicating signal plausibility issues, not hard failures.
This means the system saw something it didn’t like at some point—but not necessarily right now.
That’s a big distinction.
Step 3: Look for Patterns
Both rear wheel speed sensors were flagged at the same time.
In real-world diagnostics, when two identical components fail simultaneously, it’s rarely a coincidence.
That points you toward:
A shared condition
A system-level issue
Or a temporary event
Step 4: Clear and Retest
This is one of the most important steps in diagnosing car problems—and one of the most overlooked.
All codes were cleared.
The vehicle was shut down, allowed to sit, restarted, and then driven through a normal drive cycle.
After the test drive, the system was rescanned.
No codes returned.
Key Findings
At this point, we’ve proven several things:
The wheel speed sensors are functioning correctly
The ABS system is currently operating normally
The network communication between modules is stable
The fault condition is no longer present
That tells us this was not a hard failure.
Final Diagnosis & Repair Recommendation
The most likely cause of this issue is a low voltage or initialization event.
This commonly happens when:
A vehicle sits for extended periods
The battery voltage drops during startup
Modules wake up at slightly different times
Data doesn’t match expectations momentarily
When that happens, the ABS module may briefly report implausible wheel speed data, triggering codes that get stored in memory.
Once the system stabilizes, everything works normally—but the codes remain until cleared.
Repair Recommendation:
No repair is needed at this time.
However, it’s a good idea to:
Check battery condition
Ensure proper charging system operation
Document the event
Common Causes of This Problem
From an SEO and real-world perspective, here are the most common causes of similar issues:
Low battery voltage during startup
Vehicles sitting unused for long periods
Transport mode or delivery conditions
Temporary communication faults between modules
Software sensitivity in newer vehicle platforms
These are all things you’ll encounter when diagnosing car problems on modern vehicles.
Lessons for DIYers & Used Car Buyers
This is where experience saves you money.
If you scanned this truck and immediately replaced both rear wheel speed sensors, you would have wasted time and parts—and the problem would still be gone on its own.
That’s why automotive troubleshooting isn’t just about reading codes—it’s about understanding what those codes mean.
For used car inspection tips, this is a perfect example of something that could easily be misinterpreted.
A basic scan might show multiple codes, and an inexperienced buyer might think the vehicle has serious issues.
In reality, it could be something as simple as a past low voltage event.
Always:
Check if codes are current or stored
Verify with live data
Clear and retest before making decisions
That process separates a real problem from a ghost issue.
Don’t Get Burned on Your Next Used Car
If you’re thinking about buying a used car—or even if you already have one—this is exactly the kind of problem that can slip through the cracks and cost you big money later.
After 35+ years in the automotive field, I’ve seen firsthand how often people end up with vehicles that have hidden issues just like this.
That’s why I put together a simple Used Car Guide to help you understand what to look for and how to avoid making a costly mistake.
It’s a quick, practical guide designed to give you the right mindset and approach before you buy.
👉 Get the guide here:
https://stan.store/BobbyWhiteside
It’s a smart first step toward making a better used car decision.
Comments
Post a Comment