OBD Guide
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B133B

Reverse Gear Status Not Plausible

B133B is an OBD-II diagnostic trouble code meaning: Reverse Gear Status Not Plausible. 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 transmission display on the instrument panel
  • Problems with shifting into reverse gear
  • Check Engine light comes on

Causes

  • Gear selector position sensor malfunction
  • Open or shorted wiring harness
  • Mechanical damage to the gearbox
  • Software failure in the control unit

How to Fix

  1. Check the condition of the selector lever position sensor
  2. Inspect the wiring harness for damage
  3. Scan the system for additional errors
  4. If necessary, replace the sensor or restore the integrity of the wiring
  5. Update control unit software

Related codes

B133AB133CP0700

FAQ

What does the B133B code mean?

B133B is an OBD-II diagnostic trouble code that indicates: Reverse Gear Status Not Plausible

What causes a B133B error code?

The most common causes of B133B include: Gear selector position sensor malfunction; Open or shorted wiring harness; Mechanical damage to the gearbox; Software failure in the control unit.

How do I fix a B133B diagnostic trouble code?

To fix B133B: Check the condition of the selector lever position sensor. Inspect the wiring harness for damage. Scan the system for additional errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B133B?

Limited driving only, diagnose soon

How much does it cost to fix B133B?

The estimated repair cost for B133B is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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