U0415: Invalid Data Received From Anti-Lock Brake System (ABS) Control Module
Quick Answer
Not safe to drive
U0415 means a module, for example the engine, gearbox or power steering computer, received data from the ABS control module that did not make sense. The ABS unit shares wheel speed and brake data with other computers, so a bad wheel sensor, wiring or low voltage can all produce this code without the ABS module being faulty. The wording is generic, so the next step is to find out which module stored it and what the ABS data looked like.
- Severity
- High · Electrical
- Estimated repair cost
- From €60 to €1750+, varies by vehicle
€60 or €1750, depending on your car.
- Repair wheel speed sensor wiring or clean tone ring€60–€200
- Replace ABS control module coded to the car€500–€1750
A scan shows whether U0415 is really stored on your car, which codes sit next to it and how urgent each one is. You can do this parked, with the ignition on.
A scan needs a Bluetooth OBD2 adapter (Bluetooth LE on iPhone), about €25-60; the built-in demo runs without one. See which adapter to buy
What does U0415 mean?
U0415 is a electrical-related diagnostic trouble code classified as high severity.
What are the symptoms of U0415?
- ABS and stability or traction control lights on
- Speedometer or cruise control not working or jumping
- Engine power reduced or the EPC or check engine light on
- Power steering feeling heavy or showing a steering warning (on cars where the steering computer uses ABS data)
- Brake warning light or flashing brake light on the dash
- Code stored in the engine or steering module, with the ABS module showing no code of its own
What causes U0415?
A failing wheel speed sensor or damaged sensor wiring that feeds bad data to the ABS unit
: high
Dirty, damaged or rusty tone ring at a wheel, giving a messy signal
: medium
Low battery voltage or a weak charging system causing false data errors
: medium
Corroded connector or damaged CAN wiring between the ABS unit and the other modules
: medium
Software or calibration mismatch in the ABS or receiving module
: medium
Failing ABS control module, which is the least likely cause and the most expensive
: low
Is it safe to drive with U0415?
No - address this immediately. Normal brakes still work, but ABS, traction control and stability control may be switched off, so wheels can lock on wet or loose surfaces and the car will not help in a skid. Drive gently, leave extra stopping distance and book a check soon. Do not drive on if the brake warning light is red or the pedal feels low or soft.
How do you diagnose U0415?
- Scan all modules and note which one stores U0415. A receiving module such as the engine or steering computer stores it, and the ABS module often has its own wheel sensor or supply codes next to it.
- Test the battery and check the charging voltage, because a low supply is a simple way to get false invalid-data faults.
- With a scanner that reads the ABS module, watch the wheel speed live data while rolling the car slowly or on a safe test drive. All four values should rise together and none should drop to zero or jump around.
- Fix any wheel speed sensor code or sensor-circuit code first, then clear the codes and see whether U0415 returns.
- Inspect each wheel sensor and its wiring for damage, oil and metal debris, and look at the tone ring or encoder for rust, cracks or missing teeth.
- Check the ABS connector and the CAN wiring for corrosion, water and rubbed sections, and measure the bus resistance at the diagnostic socket (about 60 ohms between pins 6 and 14).
- Ask the garage to check whether software updates exist for the ABS and the module that stores the code, because some data faults come from mismatched software.
- Replace or refurbish the ABS module only when sensors, wiring, power and software have all been ruled out.
How much does U0415 cost to fix?
| Repair | Parts Cost | Labor Cost | Total Estimate | DIY Difficulty |
|---|---|---|---|---|
| Battery replacement | €60–€200 | €20–€60 | €80–€260 | Easy |
| Replace ABS wheel speed sensor | €30–€120 | €40–€100 | €70–€220 | Moderate |
| Repair wheel speed sensor wiring or clean tone ring | €10–€50 | €50–€150 | €60–€200 | Moderate |
| Repair CAN wiring or ABS connector | €10–€60 | €80–€250 | €90–€310 | Moderate |
| Mail-in refurbishment of existing ABS module | €150–€400 | €80–€200 | €230–€600 | Professional |
| Replace ABS control module coded to the car | €400–€1400 | €100–€350 | €500–€1750 | Professional |
Prices estimated as of October 2026. Costs vary by region, vehicle, and shop.
Related diagnostic codes
Common questions about U0415
- What is the difference between U0415 and U0121?
- U0121 means a module lost contact with the ABS control module. U0415 means contact still exists but the data it sent looked wrong. U0415 therefore often points to a sensor, wiring, voltage or software problem, while U0121 points more often at power, connectors or the ABS unit being offline.
- Is it safe to keep driving with U0415?
- The base braking usually still works, but ABS and stability control may be off. That raises the risk in rain, snow and emergency braking. Keep speeds and following distance conservative and get it checked soon.
- Should I replace the ABS module for U0415?
- Not first. The ABS module is the most expensive part and often not the fault. A wheel speed sensor, its wiring, a weak battery or a software mismatch are cheaper and more common causes, so rule those out before replacing the module.
- Why does my engine light come on for an ABS data code?
- The engine computer uses ABS data, for example vehicle speed, and may log a fault and reduce power when the data is invalid. The warning is real even though the engine itself may be fine.
- Can I find the faulty wheel sensor with a basic OBD2 reader?
- Usually not. A basic reader shows engine-related codes, and may show U0415, but wheel speed sensor values and ABS-only codes need a scanner that reads the ABS module. Some generic scanners and apps can show them depending on the car, but many cars need brand-specific software.