P2885 moderate

Transmission Internal Mode Switch B Circuit

The P2885 code means the vehicle's onboard diagnostic system has detected: Transmission Internal Mode Switch B Circuit. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
hard
Estimated cost
$300 - $1,200 (parts and labor)
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Common Symptoms

  • Abnormal internal mode switch B operation
  • Transmission shifting irregularly
  • Check Engine Light on
  • Possible transmission overheating

Probable Causes (Ranked by Likelihood)

  • Faulty internal mode switch B Very High
  • Wiring damage in internal mode switch B circuit High
  • Contaminated or low transmission fluid Moderate
  • TCM internal malfunction Low

Frequently Asked Questions

What is the internal mode switch B?

The internal mode switch B is a component within the transmission system that helps manage shift quality and overall transmission operation.

Can I drive with this code?

Short distance driving may be possible at reduced speeds, but have it diagnosed soon to prevent further damage.

Is this expensive to fix?

Repair costs depend on whether the issue is wiring, a sensor, or internal component failure. Wiring repairs are typically under $500, while internal repairs can exceed $1,000.

Mechanics Guide Step-by-step diagnosis

Step-by-Step Diagnostic Procedure

  1. Scan for DTCs and review freeze frame data

  2. Test internal mode switch B operation

  3. Inspect wiring and connectors for damage

  4. Monitor internal mode switch B parameters with scan tool

Sources 1

This page is built from documented references. Verify against your own service info before repair work.

  • SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)

Commonly Affected Vehicles

  • 2010-2019 Honda CR-V
  • 2012-2020 Toyota RAV4
  • 2014-2020 Nissan Rogue
  • 2011-2020 Chevrolet Traverse

Related Codes

P2884P2886

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