01 People Admit They Ignored This Strange Noise Until Their En… • 02 Why Did Jaguar Land Rover Suddenly Stop Shipping Cars to th… • 03 What Happens When You Press the Start Push Button While the… • 04 From Slight Pause to Complete Failure: Understanding Transm… • 05 How Fast Can a Car Go in Reverse? • 06 Airbag Failure in Mahindra Scorpio Leads to Death in Accide… • 07 How Many Gears Are Best for Drag Racing? • 08 What Happens To Your Catalytic Converter When You Keep Driv… • 09 This Is Why It’s Almost Impossible To Sink A Modern Cruise … • 10 This Is Why Your Car’s Tread Depth Is Uneven •

DTC codes / U04xx · Invalid data received from a module / U0464

U0464Invalid Data Received From Navigation Control Module

U0464 is a communication fault indicating the engine control module or another gateway module received invalid or corrupted data from the navigation control module over the vehicle's controller area network (CAN) bus. The computer detected a message from the navigation module that failed its internal checksum, contained out-of-range values, or arrived with implausible timing, so it flagged the data as untrustworthy rather than treating it as a valid signal.

SystemNetwork
Code typeGeneric (all makes)
SeverityLow
Fix difficultyIntermediate
AreaInvalid data received from a module

Symptoms you may notice

  • The check engine light or service vehicle soon message illuminates on the dashboard.
  • The navigation screen may freeze, reboot unexpectedly, or display a blank map with no vehicle position.
  • Audio and infotainment functions may cut out or become unresponsive when the navigation module misbehaves.
  • Driver assistance features that rely on navigation data, such as speed limit display or route-based adaptive cruise, may default or switch off.
  • Often no symptoms besides the warning light, because the invalid data may affect only a non-critical message.
  • Intermittent electrical gremlins such as flickering interior lights or random warning chimes if the fault is a wiring issue.

Common causes, most likely first

  1. Corroded, loose, or damaged wiring and connectors at the navigation control module or the CAN bus splice points.
  2. A failing navigation control module that intermittently outputs corrupted serial data.
  3. Low or unstable battery voltage causing the navigation module to brown out and send malformed messages.
  4. Water intrusion into the navigation module housing or its connector, common when the unit is mounted in the dash or trunk.
  5. A software or firmware glitch in the navigation module that requires a reflash or update.
  6. CAN bus termination resistor failure or a shorted CAN line that distorts the differential signal.
  7. Aftermarket accessories wired into the infotainment or CAN bus circuit that introduce electrical noise.

How to diagnose and fix it

  1. Record all stored codes and freeze-frame data with a scan tool, then clear codes and test-drive to see if U0464 returns immediately or only after a specific event.
  2. Inspect the navigation control module connectors for corrosion, pushed pins, or loose terminals, and check for water stains or debris around the module.
  3. Measure battery voltage at rest and during cranking, and load-test the battery and charging system to rule out low-voltage glitches.
  4. Check CAN bus integrity with a digital multimeter or oscilloscope at the diagnostic connector, looking for correct differential voltage and termination resistance.
  5. Perform a wiggle test on the harness while watching live data for the navigation module to catch intermittent wiring faults.
  6. If wiring and power are good, reflash or update the navigation module software per the manufacturer's service procedure.
  7. Substitute a known-good navigation control module or bench-test the original unit only after all wiring and power checks pass.

Why the navigation module sends bad data

  • A weak or failing battery is a frequent hidden cause of U0464 because the navigation module may boot slowly and transmit corrupted frames before its internal voltage regulator stabilizes.
  • Technicians often replace the navigation module only to find the real fault is a chafed CAN wire behind the dashboard or in the trunk hinge area where the harness flexes.
  • U0464 can set even when the navigation screen works perfectly, because the invalid data may concern a single message such as vehicle speed or compass heading rather than the whole module.
  • Aftermarket remote starters, dash cameras, or phone chargers plugged into the wrong circuit can inject noise onto the CAN bus and trigger invalid-data codes without any module failure.
  • Some vehicles require the navigation module to be configured or learned after replacement, and skipping that step will set U0464 again immediately.

Can I keep driving with U0464?

The vehicle remains safe to drive because U0464 affects infotainment and navigation data rather than engine, braking, or steering control, but avoid relying on the navigation screen for route guidance until the fault is repaired. If the warning light is accompanied by multiple communication codes or drivability symptoms, have the vehicle inspected promptly.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage