U0162

Universal

Lost Communication With Navigation Display Module

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium
Low Severity

The vehicle has detected that other control modules cannot communicate with the navigation display module over the vehicle network. This may affect navigation or related display functions, but the code alone does not prove the module has failed. The issue may also involve power, ground, wiring, connectors, or network communication.

Report an error with this code

⚠️ Before You Begin (Safety First)

If the display also provides essential driving information or warnings that you cannot access elsewhere, avoid driving until that information is available. Stop safely if the vehicle behaves abnormally. Otherwise, this code alone does not necessarily make the vehicle unsafe to drive.

Common Symptoms

  • Navigation or map display may be blank, unavailable, or unable to update if communication with the module is lost.
  • Related display or infotainment functions may be unavailable if they depend on the navigation display module.
  • Other warning messages may appear if the vehicle reports that the module is not responding.
  • There may be no noticeable symptoms if the issue was temporary or the affected functions are not in use.

Common Causes

  • The navigation display module may not be receiving power or ground.
  • A loose, damaged, corroded, or poorly connected wire or connector may interrupt communication.
  • A fault in the vehicle network or another connected component may prevent messages from reaching the module.
  • The navigation display module may have an internal fault, but this should be confirmed before replacement.
  • Low vehicle voltage or a temporary electrical interruption may have caused a stored communication fault.

Diagnostic Steps

  1. Note which navigation and display functions work and whether the problem is constant or intermittent; this helps establish what is affected.
  2. Check whether other electronic systems are also showing communication or power-related problems; widespread symptoms can point beyond the display module.
  3. With the vehicle safely parked, visually check accessible display-module connectors and wiring for looseness or visible damage. Do not force or disconnect connectors while the vehicle is powered.
  4. Check the owner’s manual for any relevant display or infotainment fuse information, and inspect only fuses you can identify confidently. Replace a fuse only with the specified type and rating; if it blows again, seek diagnosis.
  5. If the issue persists, have all modules scanned and the module’s power, ground, and network wiring tested using service information for the exact vehicle.

When to Call a Professional

Have a technician scan all modules to see whether communication faults are isolated or widespread and whether this code is current or stored. Using model-specific wiring information, check the navigation display module’s power, ground, connectors, and network circuits before considering module replacement. Confirm that any replacement module is compatible and can be configured for the vehicle.

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Commonly Asked Questions

Does U0162 prove the navigation display module needs replacement?

No. It records a loss of communication, which can result from module power or ground loss, wiring or connector problems, a network fault, or a module fault. Testing is needed to distinguish these causes.

Can this code be stored even if navigation works now?

Yes. A temporary loss of power or communication can leave a stored code after the display begins working again. A scan tool can help determine whether the fault is current or historical.

What does the vehicle monitor for this code?

Control modules monitor whether they can communicate with the navigation display module over the vehicle network. The code indicates that expected communication was not available; it does not identify why.

Is it safe to drive with U0162?

If only navigation is affected and the vehicle otherwise behaves normally, the code alone does not necessarily prevent driving. Do not drive if essential vehicle information or warnings are unavailable, or if the vehicle behaves abnormally.

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