U0415 – Invalid data received from Anti-lock Brake System (ABS)/Electronic Stability Program (ESP) control module

Last updated: April 8, 2026

U0415 means one control module does not trust the ABS/ESP module data it receives. You may notice ABS, traction control, or stability control warnings and reduced brake assist features. In many vehicles, the engine and transmission also change behavior because they rely on ABS/ESP signals. According to factory diagnostic data, this code indicates “Invalid data received from Anti-lock Brake System (ABS)/Electronic Stability Program (ESP) control module.” This is a network plausibility fault, not a confirmed bad ABS module. The fix depends on verifying power, ground, and network integrity first.

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U0415 Quick Answer

U0415 points to implausible or corrupted ABS/ESP data on the vehicle network. Start with a full network scan, then verify ABS/ESP module power and grounds with a voltage-drop test.

What Does U0415 Mean?

U0415 code meaning: a receiving module flags ABS/ESP information as invalid. The official definition is “Invalid data received from Anti-lock Brake System (ABS)/Electronic Stability Program (ESP) control module.” In plain terms, another computer cannot use what the ABS/ESP module reports. That can disable ABS/traction/stability functions and change how the powertrain behaves.

Technically, the receiving module checks message content and plausibility, not just message presence. It expects consistent wheel speed, yaw/steering inputs, brake switch state, and status flags. When those values disagree with other inputs or violate internal checks, it logs U0415. Many scan tools show an SAE J2012DA FTB suffix such as U0415-81. FTB format 0x04 identifies a 3-byte DTC, and the “-81” subtype helps classify the fault in standard terms. Treat it as a diagnostic direction toward data validity, not as proof of a failed module.

Theory of Operation

Under normal conditions, the ABS/ESP module broadcasts wheel speed, brake pressure or brake request, stability status, and system health over the vehicle network. Other modules use those messages for traction control torque reduction, cruise control logic, transmission shift strategy, and driver-assist features. The network expects consistent timing and correct message formatting. Modules also run plausibility checks against their own sensors.

U0415 sets when the receiving module sees an ABS/ESP message that fails plausibility or integrity checks. Noise on the network, poor ABS power or ground, or a reset during driving can corrupt data without a full loss of communication. A sensor input that looks “possible” to the ABS module can still look “impossible” to another module when compared to engine speed, steering angle, or vehicle acceleration. This is why you must confirm the network and the inputs before you condemn any control module.

Symptoms

U0415 symptoms usually show up as stability and brake-control warnings plus scan tool communication oddities.

• Scan tool behavior: ABS/ESP module shows intermittent data dropouts, sporadic DTC clearing, or brief “no communication” events during a network scan.
• ABS/traction/stability lights: ABS, ESC/ESP, or traction control warning lamps illuminate, sometimes after a short drive.
• Reduced stability functions: Traction control and stability interventions disable or feel inconsistent.
• Speed-related anomalies: Speedometer or vehicle speed signal acts erratic if it relies on ABS wheel speed data.
• Cruise/driver assist disabled: Cruise control, collision mitigation, or lane functions may shut off due to missing trusted stability data.
• Brake feel changes: Pedal feel usually remains normal, but ABS activation may not occur when expected.
• Related network DTCs: You may see other U-codes in the ECM/TCM/ADAS modules pointing at ABS/ESP message validity.

Common Causes

• ABS/ESP module power feed voltage drop: A weak fuse, relay contact, or power splice lets the module boot but corrupts message data under load.
• ABS/ESP module ground path resistance: Corrosion at a ground eyelet or loose fastener raises ground voltage, which distorts network transceiver operation and message integrity.
• CAN bus high/low short to power or ground near the ABS harness: A rubbed-through section changes bus bias and causes frames to fail plausibility checks, so other modules flag “invalid data.”
• CAN bus open/high resistance at a connector: A backed-out terminal or water intrusion reduces signal quality and increases errors, even if the ABS module still appears intermittently on the network.
• ABS/ESP module internal fault or software mismatch: A corrupted calibration or internal processor issue can transmit messages with incorrect counters, CRC, or signal values that other modules reject.
• Aftermarket device interfering with the network: Remote start, telematics trackers, or audio interfaces can load the CAN lines and create message collisions that look like invalid ABS data.
• Low system voltage event during crank or charging instability: A weak battery or alternator ripple can cause the ABS module to reset mid-message, producing invalid or incomplete data frames.
• Related ABS sensor or input plausibility faults upstream: If the ABS module receives impossible wheel speed or yaw/steering inputs, it may output implausible calculated values that other modules mark invalid.

Diagnosis Steps

You need a scan tool with full network scan and live data, a DVOM, and basic back-probing tools. Have wiring diagrams for power, ground, and CAN High/CAN Low routing. Use a battery charger or maintainer during testing. A lab scope helps, but you can confirm many U0415 faults with scan data and correct resistance and voltage checks.

1. Confirm U0415 and capture context: Record whether U0415 shows as pending, confirmed/stored, or history. Save freeze frame data if available. Focus on ignition state, vehicle speed, and any related U-codes or ABS/ESP chassis codes present at the same time.
2. Run a full network scan and verify module presence: Check whether the scan tool can communicate with the ABS/ESP control module. If the ABS module does not appear, treat it as a network/power issue first. If it appears, note any “no communication,” “bus off,” or message-related faults in other modules.
3. Compare pending vs confirmed behavior: Remember many OBD-II U-codes behave like Type B logic on some platforms. A pending U0415 can follow a one-time event like a low-voltage crank. A confirmed/stored U0415 usually repeats on two trips, so expect a repeatable fault during testing.
4. Review freeze frame vs snapshot strategy: Freeze frame shows what happened when U0415 set. Use a scan tool snapshot during a road test to catch an intermittent drop-out. Trigger the snapshot when warning lamps flicker, traction control disables, or the scan tool shows network errors.
5. Check fuses and power distribution first: Inspect ABS/ESP fuses, ignition feed circuits, and any ABS pump or module relays. Load-test the fused feed with the circuit operating. Do not rely on visual fuse checks alone.
6. Voltage-drop test ABS/ESP power and ground under load: With the module powered and the system awake, measure voltage drop from battery positive to the ABS power pin. Then measure ground drop from the ABS ground pin to battery negative. Keep ground drop under 0.1V with the circuit operating, because high resistance can pass continuity checks but fail under load.
7. Inspect ABS/ESP connectors and harness routing: Disconnect the ABS module connector(s) and inspect for water intrusion, green corrosion, bent pins, or spread terminals. Follow the harness where it runs near the wheelhouse, frame rail, and under-battery areas. Repair any chafing before deeper network tests.
8. Check CAN bus resistance with ignition OFF and battery disconnected: Disconnect the battery and wait for modules to sleep. Measure resistance between CAN High and CAN Low at an accessible module connector or DLC per the wiring diagram. A healthy HS-CAN typically reads about 60 ohms. A reading near 120 ohms or OL points to an open or missing termination, while a very low value suggests a short.
9. Check CAN bias voltage with ignition ON: Turn the ignition ON so the network bias becomes active. Measure CAN High and CAN Low to ground at a convenient access point. A healthy bus typically sits around 2.5V on both lines to ground. Do not use ignition-OFF voltage readings as a reference, because the bias is not present.
10. Isolate the fault if the bus readings are wrong: If resistance or bias looks incorrect, unplug modules one at a time on that bus segment, starting with easy-access add-ons and the ABS/ESP module. Watch for the resistance or voltage to return to normal. This step identifies the branch with the short, open, or loading condition.
11. Validate “invalid data” versus “no communication”: If the ABS/ESP module communicates, pull ABS live data and compare plausibility. Check wheel speeds for agreement, steering angle plausibility, and yaw/accel signals if equipped. When the ABS module outputs implausible values, other modules can set U0415 even though the bus wiring tests good.
12. Confirm the repair: Clear codes, then run a road test that repeats the freeze frame conditions. Re-scan for pending and confirmed U0415. Verify traction control, ABS, and stability functions operate normally and no new network codes appear.

Professional tip: When U0415 shows with an FTB suffix like -81, treat it as a diagnostic subtype, not a generic label. Use it to guide your next check. If the pattern points to erratic behavior, focus on voltage drop, connector tension, and harness movement tests while logging a snapshot.

Possible Fixes

• Repair ABS/ESP power or ground connections: Clean and tighten ground points, repair damaged power feeds, and correct voltage-drop issues found under load.
• Repair CAN High/CAN Low wiring faults: Fix shorts, opens, or high-resistance sections, especially near common rub points and water intrusion areas.
• Clean, pin-fit, or replace affected connectors/terminals: Restore terminal tension and correct corrosion or backed-out pins at the ABS module or inline connectors.
• Remove or rewire aftermarket network devices: Disconnect suspect add-on modules to confirm network stability, then install them correctly or replace with a compatible unit.
• Address upstream plausibility inputs to the ABS module: Repair sensor input faults that cause the ABS module to broadcast implausible values that other modules reject.
• Reprogram or replace the ABS/ESP control module only after verification: If power/ground and CAN integrity test good and invalid data persists, follow OEM procedures for software updates, configuration, and module replacement.

Can I Still Drive With U0415?

You can often drive with a U0415 code, but you should treat it as a safety-system warning. U0415 means another module received invalid data from the ABS/ESP control module. That condition can disable ABS, traction control, and stability control. Your base hydraulic brakes usually still work, but the vehicle may skid easier on wet, gravel, or icy roads. Avoid hard braking and aggressive steering inputs until you confirm operation. If the brake warning light stays on, the pedal feel changes, or the scan tool shows multiple chassis-network faults, stop driving and diagnose the network and ABS/ESP power and grounds first.

How Serious Is This Code?

U0415 ranges from an inconvenience to a genuine safety issue. It feels minor when the only symptom is an ABS/ESC light with normal braking. It becomes serious when the vehicle loses stability control during turns or loses ABS modulation during panic stops. Invalid ABS/ESP data can also cause other modules to make wrong decisions. The ECM, transmission, and ADAS features may reduce torque or deactivate functions. Ignoring the code increases the risk of wheel lockup on low-traction surfaces. It also increases the chance you miss an underlying network problem that later becomes a no-start or module-communication failure.

Common Misdiagnoses

Many techs replace wheel speed sensors because the dash shows ABS/ESC warnings. That guess misses what U0415 actually says. Another module complains about invalid ABS/ESP data, not a specific sensor circuit. Another common mistake involves condemning the ABS module without checking voltage drop. A weak ground or B+ feed can corrupt data while the module still “powers up.” Shops also skip a full network scan and miss companion U-codes. If the ABS module drops off the bus intermittently, you must prove CAN integrity and connector condition before any module decision.

Most Likely Fix

The most common confirmed repair direction for U0415 involves restoring clean power, ground, and network connections at the ABS/ESP module. Corrosion at the module connector, a loose ground eyelet, or water intrusion near the pump/module area often causes data corruption. A second frequent direction involves repairing CAN wiring faults near the ABS harness routing. After repairs, confirm by road testing and rescanning. Drive long enough for the ABS/ESP system to run its self-checks. Enable criteria vary by platform, so verify with service information and confirm U0415 stays out as a confirmed and pending DTC.

Repair Costs

Repair cost depends on whether the root cause is a wheel speed sensor, wiring, connector condition, or the hydraulic control unit. Start with electrical checks before replacing brake system components.