P279B — Transfer Case Gear Low Incorrect Ratio

What Does P279B Mean?

P279B is a diagnostic trouble code indicating: Transfer Case Gear Low Incorrect Ratio. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P279B

⚠️ Check Engine Light (MIL) illuminated
⚠️ Transfer Case Gear Low Incorrect Ratio not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ Reduced engine performance

Common Causes

🔍 Faulty Transfer Case Gear Low Incorrect Ratio
🔍 Wiring or connector issue in Transfer Case Gear Low Incorrect Ratio circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does P279B mean?

P279B indicates: Transfer Case Gear Low Incorrect Ratio. The vehicle's computer has detected that the Transfer Case Gear Low Incorrect Ratio is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P279B?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P279B for extended periods may cause additional problems.

How much does it cost to fix P279B?

Repair costs for P279B typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect Transfer Case Gear Low Incorrect Ratio and related wiring
🔧 Replace faulty Transfer Case Gear Low Incorrect Ratio

1
Find your vehicle above
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2
Check for recalls
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P279B: Transfer Case Gear Low Incorrect Ratio