P27B3
Internal Control Module Transmission Gear Select Performance
P27B3 is an OBD-II diagnostic trouble code meaning: Internal Control Module Transmission Gear Select Performance. Common causes: transmission control module malfunction, problems with wiring or connectors. Estimated repair cost: $56–278.
Symptoms
- Incorrect gear shifting
- Switching delays
- Switching to emergency mode
- Check Engine Light Flashing
- Power Loss
Causes
- Transmission control module malfunction
- Problems with wiring or connectors
- Mechanical damage to the switching system
- Software glitches
- Problems with gear position sensors
How to Fix
- Check error codes and scanner data
- Inspect the module wiring and connectors
- Check mechanical switching components
- Update module software
- If necessary, replace the control module
Related codes
Error P27B3 by Vehicle Brand
FAQ
What does the P27B3 code mean?
P27B3 is an OBD-II diagnostic trouble code that indicates: Internal Control Module Transmission Gear Select Performance
What causes a P27B3 error code?
The most common causes of P27B3 include: Transmission control module malfunction; Problems with wiring or connectors; Mechanical damage to the switching system; Software glitches.
How do I fix a P27B3 diagnostic trouble code?
To fix P27B3: Check error codes and scanner data. Inspect the module wiring and connectors. Check mechanical switching components. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P27B3?
Do not drive — repair immediately
How much does it cost to fix P27B3?
The estimated repair cost for P27B3 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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