U0415 Code — Invalid Data Received From Anti-Lock Brake System (ABS) Control Module #

U0415 means that another control module has received data from the ABS control module that it considers invalid, implausible, or unreliable.

This is an important distinction: U0415 does not automatically mean that communication with the ABS module has been lost, and it does not automatically mean that the ABS module itself needs replacement.

The fault can be caused by incorrect wheel-speed data, wiring or connector problems, low system voltage, module configuration or software issues, or an internal ABS-related fault.

Because the ABS system shares information with traction control, stability control, power steering, transmission, ADAS and other vehicle systems, U0415 may appear in several modules at the same time.

U0415 at a glance #

Item	Meaning
DTC	U0415
System	Network / vehicle communication
Generic description	Invalid Data Received From Anti-Lock Brake System (ABS) Control Module
Main system involved	ABS / ESC
Typical warning lights	ABS, traction control, stability control and sometimes other system warnings
Can the vehicle still drive?	Often yes, but ABS/ESC or related assistance functions may be unavailable
Does U0415 prove the ABS module is bad?	No
First action	Scan all modules and check associated ABS/chassis codes before replacing anything

What does U0415 actually mean? #

Modern vehicles use communication networks such as CAN bus to exchange information between electronic control modules.

The ABS module broadcasts information including wheel-speed and braking-system data. Other modules use this information for functions such as:

traction control;
electronic stability control;
transmission operation;
electric power steering;
cruise control;
hill-start assist;
driver-assistance systems.

U0415 is stored when a receiving module is still getting information associated with the ABS system, but considers that information invalid or implausible.

This is different from a complete loss of communication.

U0415 vs U0121: an important diagnostic difference #

These two codes are easy to confuse.

U0415 — Invalid data received from ABS #

The ABS module or its information is visible on the network, but one or more transmitted values are considered invalid.

Think:

“I can hear the ABS module, but I don’t trust what it is telling me.”

U0121 — Lost communication with ABS module #

The expected ABS messages are no longer being received.

Think:

“I cannot hear the ABS module at all.”

This distinction changes the diagnostic approach.

With U0121, checking ABS module power, ground and network communication becomes a high priority.

With U0415, you should also investigate the data being supplied to and transmitted by the ABS module, especially related chassis codes and wheel-speed information.

Symptoms associated with U0415 #

The exact symptoms depend on which module stored the code and on the vehicle manufacturer.

Possible symptoms include:

ABS warning light;
traction-control warning light;
stability-control warning;
“Service ABS” or similar message;
hill-start assist unavailable;
cruise-control unavailable;
driver-assistance warnings;
reduced steering assistance on some vehicles;
speed-related information behaving abnormally;
several warning lights appearing simultaneously.

The normal hydraulic braking system may continue to operate, but functions such as ABS or stability control can be disabled when the system detects unreliable data.

Check the other fault codes first #

U0415 is frequently more useful when interpreted with the other codes stored in the vehicle.

Before replacing an ABS module, perform a complete vehicle scan rather than reading only the engine ECU.

If you also have an ABS/chassis C-code #

Diagnose the more specific code first.

For example, if the ABS module reports a wheel-speed sensor or signal fault, the invalid wheel-speed information can then be transmitted to other modules and cause U0415 to appear elsewhere.

In that situation, U0415 may be a secondary consequence rather than the root problem.

If you also have U0121 #

A communication failure may be affecting access to the ABS module itself.

Diagnose the communication problem first.

If several unrelated U-codes appeared at the same time #

Check the battery, charging system, module power supplies, grounds and CAN network before replacing individual modules.

Low voltage or a network fault can create multiple communication-related DTCs simultaneously.

Common diagnostic areas for U0415 #

There is no single component that causes U0415 on every vehicle.

The following areas should be investigated according to the other codes and live data present.

1. Wheel-speed sensor data #

The ABS control module relies heavily on wheel-speed information.

Check live wheel-speed data while driving slowly.

All wheels should report plausible values relative to vehicle speed.

A sensor that intermittently drops to zero, spikes or disagrees significantly with the other wheels can lead to invalid ABS information being transmitted across the vehicle network.

Inspect:

wheel-speed sensors;
sensor connectors;
wiring near the suspension;
wheel bearings containing magnetic encoder rings;
external ABS tone rings where fitted.

Do not assume the sensor itself is defective until the wiring and encoder/tone ring have also been inspected.

2. ABS module connectors and wiring #

Inspect the ABS hydraulic unit and electronic module connector for:

water intrusion;
corrosion;
damaged terminals;
loose pins;
damaged wiring;
previous collision or repair damage.

Pay particular attention to wiring in areas exposed to road spray, suspension movement or previous mechanical work.

3. Battery voltage, power and grounds #

Communication faults can appear when control modules do not receive stable voltage.

Check:

battery condition;
charging voltage;
ABS module power supplies;
ABS module grounds;
voltage drop across major ground connections.

If multiple communication codes appeared after a weak battery, jump-start or battery replacement, investigate system voltage before replacing electronic modules.

4. CAN communication network #

If several modules show communication faults, network diagnosis may be required.

On many high-speed CAN systems, technicians commonly see approximately 60 Ω when measuring between CAN High and CAN Low with the network powered down correctly.

However, network architecture varies between vehicles.

Always use the manufacturer’s wiring diagram and test procedure before interpreting resistance or voltage readings.

A network fault may be caused by:

an open CAN wire;
CAN High or CAN Low shorted to ground;
short to voltage;
CAN High and CAN Low shorted together;
connector corrosion;
a control module interfering with the network.

5. Module software and configuration #

Do not overlook software.

U0415 can be generated even when the wiring and ABS hardware are functioning correctly.

Manufacturers have published service information where software updates or module configuration procedures correct U0415-related complaints.

Before replacing an expensive ABS, steering or ADAS module, check for applicable Technical Service Bulletins and software updates using the vehicle’s VIN.

Documented Ford examples #

Manufacturer-specific cases demonstrate why U0415 should not automatically lead to ABS-module replacement.

2021 Ford F-150 and Mustang Mach-E #

Ford documented vehicles displaying “Reverse Brake Assist Unavailable”, missing active reversing-camera guide lines and/or U0415:86 stored in the IPMA.

In Ford SSM 50276, this condition is linked to a network interruption during module programming or module disconnection, which can reset the steering center find. Ford’s procedure calls for relearning the steering center by driving the vehicle and, if needed, performing IPMA camera alignment rather than replacing the ABS module based on U0415 alone.

2021 Ford Ranger #

A Ford bulletin covering certain 2021 Ranger 4WD vehicles built between April and July 2021 documented several CAN communication codes including U0415.

In that specific case, the cause could be an internal fault in the all-terrain control module/mode-select switch.

This illustrates an important point:

The module reporting U0415 and the ABS module named by U0415 do not necessarily identify the component that must be replaced.

Ford diagnostic documentation #

Ford’s own OBD documentation distinguishes three network situations:

CAN network unavailable;
expected module communication lost;
module communicating but key transmitted information invalid.

U0415 belongs to the third category for ABS information.

Step-by-step U0415 diagnosis #

Step 1 — Perform a complete module scan #

Record every DTC before clearing anything.

Note which module actually stored U0415.

This information matters.

Step 2 — Look for more specific ABS or chassis codes #

If wheel-speed sensor, steering-angle or other ABS-related codes are present, diagnose those codes first.

They may explain why another module considers the ABS data invalid.

Step 3 — Check live wheel-speed data #

Compare all four wheel speeds during a low-speed road test where safe.

Look for:

one wheel reading zero;
intermittent dropouts;
implausible spikes;
one wheel consistently disagreeing with the others.

Step 4 — Check battery and charging voltage #

A voltage problem affecting several modules can create misleading network codes.

Correct power-supply problems before continuing advanced CAN diagnosis.

Step 5 — Inspect ABS power, grounds and connectors #

Look for corrosion, loose terminals, water intrusion and damaged wiring.

Step 6 — Check recent work #

If U0415 appeared after:

wheel-bearing replacement;
suspension work;
ABS module replacement;
steering work;
battery replacement;
collision repair;

inspect the affected area carefully.

A damaged wheel-speed wire, incorrect bearing/encoder assembly or incorrectly configured module can create invalid data.

Step 7 — Check OEM bulletins and software #

Search using the exact:

make;
model;
model year;
engine;
module storing U0415;
U0415 failure-type suffix, if present.

Codes such as U0415:00 and U0415:86 can provide additional manufacturer-specific information.

Step 8 — Only consider module replacement after testing #

An ABS control module can fail, but replacing it should normally come after:

related DTC diagnosis;
sensor checks;
wiring checks;
power and ground checks;
network checks;
applicable software updates.

Can you drive with U0415? #

The answer depends on the vehicle and on which functions have been disabled.

The vehicle may retain normal hydraulic braking while ABS, traction control, stability control or other driver-assistance functions are unavailable.

If the ABS, brake or stability-control warning lights are illuminated, drive only as necessary to have the vehicle diagnosed and adapt your driving to the reduced safety assistance.

If normal braking performance is affected or a red brake warning appears, stop driving and inspect the braking system immediately.

Can you simply clear U0415? #

You can erase the code with a compatible diagnostic scanner, but clearing the memory does not repair the underlying cause.

If the invalid data is still present, U0415 will return.

Clearing the code is useful after a repair to verify whether the fault has been resolved.

Does U0415 mean the ABS module needs replacement? #

No.

U0415 tells you that a module considers ABS-related information invalid.

Possible root causes include:

wheel-speed signal problems;
sensor or encoder/tone-ring faults;
wiring and connector issues;
unstable power supply;
CAN communication problems;
software or configuration problems;
and, in some cases, an ABS control module fault.

Replacing the module without testing the rest of the system can lead to an expensive misdiagnosis.

Related codes #

U0121 — Lost Communication With ABS Control Module
Unlike U0415, this indicates that expected communication with the ABS module has been lost.

U0418 — Invalid Data Received From Brake System Control Module
Another invalid-data network code involving brake-system information.

U0400 — Invalid Data Received
A broader network DTC indicating that invalid information was received from another module.

Specific C-codes stored inside the ABS/ESC module may provide a much more precise indication of the root cause and should usually be investigated before treating U0415 as the primary fault.

For more communication-related faults, browse all Network Communication Codes.

Frequently asked questions #

Is U0415 an ABS sensor code? #

Not specifically. It is a network/data-validity code. A wheel-speed sensor problem can contribute to U0415, but the code itself does not identify a particular sensor.

Is U0415 a CAN bus code? #

Yes. It belongs to the U-code/network family and concerns information being exchanged between vehicle modules.

Can a weak battery cause U0415? #

Low or unstable voltage can create module communication and data-validity faults. If several U-codes appeared at the same time, battery condition, charging voltage, power supplies and grounds should be checked early in the diagnosis.

Can a wheel bearing cause U0415? #

Potentially. On vehicles where the wheel-speed encoder is incorporated into the wheel bearing or hub assembly, an incorrect, damaged or poorly installed component can result in an invalid wheel-speed signal.

A more specific ABS/chassis code is often stored alongside U0415.

What should I diagnose first? #

Start with a complete scan of every control module.

If a more specific ABS or chassis code is present, investigate that fault first. U0415 may simply be reporting the consequences of invalid information generated elsewhere in the ABS system.

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