U0415
Invalid Data Received From Anti-Lock Brake System Control ModuleU0415 is a generic OBD-II network diagnostic trouble code: Invalid Data Received From Anti-Lock Brake System Control Module. It is logged by the engine control unit when the network monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.
What U0415 means
U0415 is defined as "Invalid Data Received From Anti-Lock Brake System (ABS) Control Module." Unlike U0121 (which indicates complete loss of communication with the ABS module), U0415 means the network messages from the ABS module are being received by other controllers — most commonly the powertrain control module (PCM) or the electronic stability control module — but the content of those messages fails plausibility or range checks. The receiving module determines the data is internally inconsistent, out of range, or contradictory, and sets U0415 rather than accepting the corrupted data.
The most frequent underlying cause is a faulty wheel speed sensor or its wiring supplying bad data to the ABS module, which then re-broadcasts that corrupted signal onto the CAN bus. ABS module internal hardware or firmware failure can also cause the module to transmit malformed CAN frames. Because wheel speed data is shared with the transmission control module (for shift scheduling), the stability control system, and the speedometer, invalid ABS data can produce secondary faults in these systems. In rare cases a failing PCM or corrupted PCM calibration may incorrectly reject valid ABS data, but this should only be considered after all ABS-side causes have been eliminated.
With U0415 active, the ABS and electronic stability control (ESC/TCS) systems are typically deactivated as a safety measure. This means normal friction braking is preserved, but anti-lock modulation will not function during an emergency stop. The fault should be diagnosed promptly to restore full active safety system operation.
Common causes
Most-frequently reported root causes when U0415 is logged.
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1
Faulty or damaged wheel speed sensor supplying out-of-range or erratic signals to the ABS module.
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2
Damaged, corroded, or shorted wiring in the wheel speed sensor harness.
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3
Internal hardware or firmware failure of the ABS control module causing malformed CAN transmissions.
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4
Corroded or damaged connector pins in the ABS module wiring harness.
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5
Defective ABS hydraulic pump assembly affecting module operation.
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6
Bus-level CAN wiring fault causing data corruption on the message from the ABS module.
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7
Failed PCM incorrectly rejecting valid ABS data (uncommon; investigate after all other causes).
Symptoms drivers notice
How to diagnose U0415
A typical diagnostic flow when this code is present.
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1
Perform a full multi-module DTC scan and record all stored codes, paying close attention to any ABS module-specific codes and wheel speed sensor codes (C-codes) that point to the data source.
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2
Review freeze frame data and ABS module live data with a scan tool capable of reading CAN bus values; confirm which wheel speed sensor channel is reporting anomalous values.
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3
Visually inspect all four wheel speed sensor wiring harnesses for chafing, broken wires, or connector corrosion, particularly near wheel bearing housings and suspension pivot points.
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4
Measure wheel speed sensor resistance and output voltage or frequency at each sensor according to OEM specifications to isolate a defective sensor.
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5
Inspect the ABS module connector and harness for corrosion, backed-out pins, or water intrusion; perform a pin-drag test on all terminals.
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6
If all sensors and wiring check out, check ABS module power and ground supplies; verify CAN bus integrity between the ABS module and the PCM.
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7
Replace the ABS module only after confirming that all wheel speed sensors, wiring, and bus connections are within specification.
Related network codes
- U0400 — Invalid Data Received
- U0401 — Invalid Data Received From ECM/PCM
- U0402 — Invalid Data Received From Transmission Control Module
- U0403 — Invalid Data Received From Transfer Case Control Module
- U0404 — Invalid Data Received From Gear Shift Control Module
- U0405 — Invalid Data Received From Cruise Control Module
Frequently asked questions
Does U0415 mean the brakes will not work?
Standard hydraulic braking remains fully functional with U0415 active. What is lost is the ABS anti-lock modulation during emergency braking and the traction/stability control interventions. You can still stop the vehicle, but wheel lockup is possible during a hard stop.
What is the difference between U0121 and U0415?
U0121 means the ABS module is completely absent from the CAN network — no messages are being received at all. U0415 means the ABS module is communicating, but the data content of its messages fails the receiving module's plausibility checks. U0415 therefore often points to a sensor or data integrity problem rather than a total module or bus failure.
Can a bad wheel speed sensor cause U0415?
Yes, this is the most common root cause. A wheel speed sensor providing implausible readings causes the ABS module to broadcast corrupted speed data onto the CAN bus. Other modules that consume that data then detect the implausibility and set U0415. Look for accompanying C-code wheel speed sensor DTCs to identify the specific corner.
Is it safe to drive with U0415?
Short-distance driving to a repair facility is generally acceptable since normal braking is preserved, but the vehicle should not be driven in conditions where ABS or stability control intervention might be needed, such as wet roads, snow, or emergency avoidance maneuvers.
Disabling U0415 in software
RaceTune can permanently disable U0415 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.
Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.
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