OBD Guide
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U1795

14V Power Module Powertrain Expansion Communication Bus Off

U1795 is an OBD-II diagnostic trouble code meaning: 14V Power Module Powertrain Expansion Communication Bus Off. Common causes: broken or damaged can bus wires, short circuit in communication circuit. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Check Engine Light Is On
  • Possible problems with gear shifting
  • Reduced engine power
  • Engine speed limit
  • Errors in other vehicle systems

Causes

  • Broken or damaged CAN bus wires
  • Short circuit in communication circuit
  • Power module fault
  • Module power problems
  • Contact corrosion

How to Fix

  1. Check the integrity of the CAN bus wiring
  2. Check connections and contacts of the power module
  3. Check the power supply to the power module
  4. Scan other modules for errors
  5. Replace the power module if necessary

Related codes

U1796U1794U1797

FAQ

What does the U1795 code mean?

U1795 is an OBD-II diagnostic trouble code that indicates: 14V Power Module Powertrain Expansion Communication Bus Off

What causes a U1795 error code?

The most common causes of U1795 include: Broken or damaged CAN bus wires; Short circuit in communication circuit; Power module fault; Module power problems.

How do I fix a U1795 diagnostic trouble code?

To fix U1795: Check the integrity of the CAN bus wiring. Check connections and contacts of the power module. Check the power supply to the power module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1795?

Limited driving only, diagnose soon

How much does it cost to fix U1795?

The estimated repair cost for U1795 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat