Code result

P279C

Transfer Case Gear Neutral Incorrect Ratio

High severity

What it means

When the transfer case is in Neutral the measured output speed is not zero or shows unexpected drag.

Is it safe to drive?

No — stop driving

This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.

Most likely causes

  • Shift fork not fully in neutral position

    high

    One of the most commonly reported causes for this code — check this first.

  • Drag torque from contaminated oil

    medium

    A plausible cause — test and verify before replacing parts.

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