Transmission Internal Mode Switch B Circuit Low
The P2887 code means the vehicle's onboard diagnostic system has detected: Transmission Internal Mode Switch B Circuit Low. This is a moderate severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- hard
- Estimated cost
- $300 - $1,200 (parts and labor)
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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Common Symptoms
- Transmission Internal Mode Switch B signal missing
- Transmission stuck in one gear
- Check Engine Light on
- Limp mode activated
Probable Causes (Ranked by Likelihood)
- Short to ground in internal mode switch B circuit Very High
- Failed internal mode switch B High
- Corroded connector pins Moderate
- TCM ground circuit fault Low
Frequently Asked Questions
What causes a low circuit reading?
A low circuit reading is typically caused by a short to ground in the wiring or an internal sensor failure that pulls the signal below minimum.
Can I fix this myself?
If the issue is an accessible connector or external wiring, a competent DIYer may be able to repair it. Internal transmission issues require professional service.
Will this get worse over time?
Yes, electrical issues tend to worsen. Intermittent problems can become permanent failures, potentially causing more expensive damage.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Retrieve DTCs and freeze frame data
-
Measure internal mode switch B voltage at connector
-
Test wiring for shorts to ground
-
Inspect connector for corrosion
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
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