U0145

Universal

Lost Communication With Body Control Module E

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

The vehicle detected that one or more control modules could not communicate with Body Control Module E. Body control modules manage various vehicle body and convenience functions, but which functions are involved depends on the vehicle. The fault may cause affected features to behave incorrectly, or it may be intermittent and produce no noticeable symptoms. This code alone does not prove that the module needs replacement.

Report an error with this code

⚠️ Before You Begin (Safety First)

If lighting, wipers, door or latch functions, or another feature needed for safe operation is not working, avoid driving until it is checked. Stop driving if the fault affects visibility, vehicle control, or safe entry and exit. Do not probe airbag wiring or bypass safety systems.

Common Symptoms

  • There may be no noticeable symptoms, especially if the communication loss is intermittent or the affected functions are not in use.
  • One or more body or convenience features may stop working or behave unpredictably, depending on which functions Body Control Module E supports on that vehicle.
  • A warning message or indicator may appear if another module reports that it cannot communicate with Body Control Module E.
  • The fault may occur intermittently if a connection, power supply, ground, or network wire is unreliable.

Common Causes

  • A loose, damaged, corroded, or poorly connected electrical connector may interrupt communication.
  • Damaged network wiring or a wiring short or open may prevent messages from reaching the module.
  • A fuse, power supply, or ground problem may stop Body Control Module E from operating or communicating correctly.
  • A low or unstable vehicle battery supply may contribute to communication problems.
  • A fault in Body Control Module E or another part of the communication network is possible, but the code alone does not identify a failed part.

Diagnostic Steps

  1. Note which features are affected and whether the problem is constant or intermittent; this can help narrow down the systems involved.
  2. Check the battery for obvious damage and make sure its connections are secure. Do not continue if the battery is damaged or unsafe to handle.
  3. Use the owner’s manual to identify relevant fuses, then visually check them. Replace a fuse only with the specified type and rating; if it blows again, have the circuit diagnosed.
  4. With the vehicle safely turned off, visually inspect accessible wiring and connectors for damage, looseness, or corrosion. Do not disturb airbag wiring or connectors.
  5. If you have a suitable scan tool, record codes from all modules before clearing anything. A technician may need vehicle-specific information to interpret communication codes and test the network.

When to Call a Professional

Scan all available modules and compare their communication faults and status; related codes can help distinguish a network-wide problem from a fault affecting one module. Check the vehicle-specific wiring information, module power and grounds, and network wiring and connectors before considering module replacement. Follow the correct diagnostic procedure for the model, year, and engine.

Compare component listings

Confirm diagnosis and vehicle fitment before buying. A listing does not prove that a part needs replacement. We may earn a commission from qualifying purchases.

Search Amazon Search eBay

Commonly Asked Questions

Does U0145 mean Body Control Module E has failed?

No. It reports a loss of communication, which can result from wiring, connector, power, ground, network, or module problems. Testing is needed before replacing a module.

Can this code appear when the vehicle seems to work normally?

Yes. A communication fault can be intermittent or affect functions that are not immediately noticeable.

Why should other module codes be checked?

Several modules reporting communication problems may point toward a shared network or power issue, while a single module’s communication fault may help focus testing. The vehicle-specific network design matters.

Is it safe to keep driving?

That depends on which functions are affected. Do not drive if the fault disables lighting, wipers, or another feature needed for safe operation.

Browse Available Code Guides

Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.