OBD Guide
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C1778

Power Steering Failure

C1778 is an OBD-II diagnostic trouble code meaning: Power Steering Failure. Common causes: power steering pump malfunction, hydraulic fluid leak. Estimated repair cost: $56–167.

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

Symptoms

  • Tight steering
  • Noise or grinding noise when turning the steering wheel
  • Check engine light comes on

Causes

  • Power steering pump malfunction
  • Hydraulic fluid leak
  • Wiring Harness Problems
  • Steering angle sensor failure

How to Fix

  1. Check hydraulic fluid level
  2. Inspect the power steering pump for leaks
  3. Check wiring harness and connections
  4. Diagnose the steering angle sensor

Related codes

C1777C1779C1780

FAQ

What does the C1778 code mean?

C1778 is an OBD-II diagnostic trouble code that indicates: Power Steering Failure

What causes a C1778 error code?

The most common causes of C1778 include: Power steering pump malfunction; Hydraulic fluid leak; Wiring Harness Problems; Steering angle sensor failure.

How do I fix a C1778 diagnostic trouble code?

To fix C1778: Check hydraulic fluid level. Inspect the power steering pump for leaks. Check wiring harness and connections. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1778?

Limited driving only, diagnose soon

How much does it cost to fix C1778?

The estimated repair cost for C1778 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat