P0578Low SeverityEngine

Power Steering High Input Signal C

What This Means

The power steering signal voltage is above maximum threshold. This input helps the engine computer coordinate with power steering operation.

Common Symptoms

System malfunction
Power Steering issues
Check engine light on
Unexpected behavior

Common Causes

Faulty power steering switch
Wiring damage
Connector issue
Circuit fault
PCM input failure

Estimated Repair Cost

$50 – $350

Parts and labor (varies by vehicle and location)

Difficulty:Easy

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.