Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / U0058 — Vehicle Communication Bus D (+) low

U0058 — Vehicle Communication Bus D (+) low

Detailed page for trouble code U0058.

34,939codes
59brands
11,925generic
23,014specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

U0058

MERCEDES-BENZ U — Network/User

Vehicle Communication Bus D (+) low

Brand: MERCEDES-BENZ
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or high-resistance connection in Bus D (+) conductor
  • Short to ground on Bus D (+)
  • Short to battery or high voltage on related conductors
  • Corroded, damaged or disconnected connector/joint
  • Failed CAN/LIN transceiver or module driving the bus
  • Faulty termination resistor or missing termination

Symptoms

  • Multiple module warnings or ‘communication error’ messages on dash
  • Certain body, comfort or drivetrain functions inoperative or intermittent
  • Loss of diagnostics / “module unavailable” in scan tool
  • Illuminated malfunction indicator lamp(s)
  • Vehicle may enter limp/limited mode if critical module loses communication

What to check

  • Use a capable scan tool to read freeze frames and list all modules reporting communication faults
  • Visually inspect wiring harnesses, connectors and grommets on Bus D route for damage or corrosion
  • With ignition on, check supply and ground integrity at battery and main grounds
  • Measure voltage on Bus D (+) at known nodes per wiring diagram, comparing to reference and expected idle level
  • Check for short to ground or battery on Bus D (+) using an ohmmeter/power-off resistance test
  • Disconnect suspected module(s) one at a time to see if the fault clears (isolate faulty module/transceiver)

Signal parameters

  • Refer to Mercedes-Benz wiring diagrams for exact values for Bus D; nominal idle voltages vary by bus type
  • Typical CAN differential idle voltage: around 2.5 V per line (centre/bias) and ~60 ohms differential termination across CAN_H and CAN_L (when applicable)
  • Single-wire or high-voltage bus variants may show a recessive-line voltage near battery potential (approx. 9–12 V) — verify for the specific vehicle
  • When active, voltages will switch/pulse; lack of expected activity or a persistently low voltage on the (+) conductor indicates a fault
  • Always compare measurements to manufacturer specifications and measure with reference to chassis ground

Diagnostic algorithm

  1. Read and record all current and pending codes from every module; note which modules report ‘no communication’.
  2. Obtain wiring diagrams and network topology for Bus D to identify all connected modules, connectors, and termination points.
  3. Perform a visual inspection of harnesses and connectors along the Bus D route; repair any obvious damage or corrosion.
  4. With ignition ON (engine off), measure Bus D (+) voltage at multiple nodes and compare to specification. Look for a node that reads low compared with others.
  5. If bus voltage is low at all nodes, check main power/ground and termination resistors. If only low at/after a specific module, disconnect that module and re-measure.
  6. Test for short to ground or short to battery on the Bus D (+) conductor using a multimeter (power off) and/or a short-finder tool; repair wiring as needed.
  7. If wiring and connectors are good, suspect a failed module or transceiver. Swap or bench-test the suspected module if possible, or replace the module/transceiver per manufacturer guidance.
  8. After repairs, clear DTCs, perform a network relearn if required, and verify normal bus behavior and module presence with a scan tool during a road test or function check.
  9. If intermittent faults persist, perform wiggle tests, heating/cooling, and extended road tests to reproduce the fault and locate intermittent wiring or connector issues.

Likely causes

  • Damaged/loose connector or pin at a module on Bus D
  • Short to ground on Bus D (+) wiring (pinched or chafed wire)
  • Failed control module or transceiver pulling the line low
  • Missing/failed termination causing incorrect biasing
  • Intermittent connector contact due to corrosion or moisture

Fault status

⚠️ Status
Vehicle Communication Bus D (+) low — network positive conductor below expected level causing communication errors on Bus D.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-4 hours

Similar codes

U0073 U0100 U0115 U0121 U0140 U0155
856

Browse 856 MERCEDES-BENZ manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MERCEDES-BENZ

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .