OBD Guide
ENFRDEESPT

C1490

Rear Differential Actuator Initialization Failure

C1490 is an OBD-II diagnostic trouble code meaning: Rear Differential Actuator Initialization Failure. Common causes: rear differential drive malfunction, wiring harness problems. Estimated repair cost: $56–222.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Check Engine Light Is On
  • Handling problems on slippery surfaces
  • Rear differential lock does not work

Causes

  • Rear differential drive malfunction
  • Wiring Harness Problems
  • Low differential fluid level
  • Dirty or oxidized contacts
  • Malfunction of the differential control unit

How to Fix

  1. Check the level and condition of the fluid in the differential
  2. Inspect the wiring harness and contacts for damage or oxidation.
  3. Check the functionality of the differential drive
  4. Initialize the drive using diagnostic equipment
  5. If necessary, replace the drive or control unit

Related codes

C1491C1492C1493

FAQ

What does the C1490 code mean?

C1490 is an OBD-II diagnostic trouble code that indicates: Rear Differential Actuator Initialization Failure

What causes a C1490 error code?

The most common causes of C1490 include: Rear differential drive malfunction; Wiring Harness Problems; Low differential fluid level; Dirty or oxidized contacts.

How do I fix a C1490 diagnostic trouble code?

To fix C1490: Check the level and condition of the fluid in the differential. Inspect the wiring harness and contacts for damage or oxidation.. Check the functionality of the differential drive. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1490?

Limited driving only, diagnose soon

How much does it cost to fix C1490?

The estimated repair cost for C1490 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat