OBD Guide
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C1604

Electric Power Steering Torque Sensor

C1604 is an OBD-II diagnostic trouble code meaning: Electric Power Steering Torque Sensor. Common causes: torque sensor malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Stiff steering wheel rotation
  • Uneven steering effort
  • EUR malfunction lamp is on
  • Amplifier intermittent operation

Causes

  • Torque sensor malfunction
  • Open or short circuit in wiring harness
  • Poor contact in connectors
  • Problems with the EUR control unit

How to Fix

  1. Check the voltage and resistance of the sensor according to the specification
  2. Inspect the wiring harness for damage
  3. Clean connector contacts
  4. If necessary, replace the torque sensor
  5. Test the operation of the EUR after repair

Related codes

C1601C1602C1603

FAQ

What does the C1604 code mean?

C1604 is an OBD-II diagnostic trouble code that indicates: Electric Power Steering Torque Sensor

What causes a C1604 error code?

The most common causes of C1604 include: Torque sensor malfunction; Open or short circuit in wiring harness; Poor contact in connectors; Problems with the EUR control unit.

How do I fix a C1604 diagnostic trouble code?

To fix C1604: Check the voltage and resistance of the sensor according to the specification. Inspect the wiring harness for damage. Clean connector contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1604?

Limited driving only, diagnose soon

How much does it cost to fix C1604?

The estimated repair cost for C1604 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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