OBD Guide
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B2166

Gear Select Position Fault

B2166 is an OBD-II diagnostic trouble code meaning: Gear Select Position Fault. Common causes: gear selector position sensor malfunction, open or shorted wiring harness. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect display of the current gear on the instrument panel
  • Gear shifting problems
  • Transition to emergency mode of operation of the transmission
  • Check Engine Light Illuminates

Causes

  • Gear selector position sensor malfunction
  • Open or shorted wiring harness
  • Mechanical damage to the gear shift lever
  • Transmission control module (TCM) problems
  • Corrosion of contacts or connectors

How to Fix

  1. Check the condition of the gear selector position sensor
  2. Inspect the wiring harness for damage
  3. Check the mechanical part of the gear shift system
  4. Scan the transmission control unit for errors
  5. If necessary, replace faulty components

Related codes

P0705P0706P0707

FAQ

What does the B2166 code mean?

B2166 is an OBD-II diagnostic trouble code that indicates: Gear Select Position Fault

What causes a B2166 error code?

The most common causes of B2166 include: Gear selector position sensor malfunction; Open or shorted wiring harness; Mechanical damage to the gear shift lever; Transmission control module (TCM) problems.

How do I fix a B2166 diagnostic trouble code?

To fix B2166: Check the condition of the gear selector position sensor. Inspect the wiring harness for damage. Check the mechanical part of the gear shift system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2166?

Limited driving only, diagnose soon

How much does it cost to fix B2166?

The estimated repair cost for B2166 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat