OBD Guide
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U1045

Invalid Or Missing Data For Traction Motor

U1045 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Traction Motor. Common causes: broken or damaged can bus wires, poor contact in connectors. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–278 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Problems with the operation of the hybrid system
  • Switching to emergency mode
  • Errors in the regenerative braking system

Causes

  • Broken or damaged CAN bus wires
  • Poor contact in connectors
  • Traction motor control unit malfunction
  • Software error in control module
  • Corrosion of electrical connections

How to Fix

  1. Check the integrity of the CAN bus wiring harness
  2. Inspect and clean all electrical connectors
  3. Check the power and ground of the control unit
  4. Read and analyze error codes in other modules
  5. Update control unit software
  6. Repair only from an authorized dealer

Related codes

U1040U1041U1050

FAQ

What does the U1045 code mean?

U1045 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Traction Motor

What causes a U1045 error code?

The most common causes of U1045 include: Broken or damaged CAN bus wires; Poor contact in connectors; Traction motor control unit malfunction; Software error in control module.

How do I fix a U1045 diagnostic trouble code?

To fix U1045: Check the integrity of the CAN bus wiring harness. Inspect and clean all electrical connectors. Check the power and ground of the control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1045?

Do not drive — repair immediately

How much does it cost to fix U1045?

The estimated repair cost for U1045 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat