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.
- Keep driving?
- Short distances only
- 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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What Are the Symptoms of P2885?
- Abnormal internal mode switch B operation
- Transmission shifting irregularly
- Check Engine Light on
- Possible transmission overheating
What Causes P2885? (Most Likely First)
- 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
Can I Still Drive with P2885?
Short distances only. P2885 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
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
How Do You Diagnose P2885?
-
Scan for DTCs and review freeze frame data
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Test internal mode switch B operation
-
Inspect wiring and connectors for damage
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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)
Which Vehicles Commonly Get P2885?
- 2010-2019 Honda CR-V
- 2012-2020 Toyota RAV4
- 2014-2020 Nissan Rogue
- 2011-2020 Chevrolet Traverse
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