P27B1
Internal Control Module Transmission Range Select Performance
P27B1 is an OBD-II diagnostic trouble code meaning: Internal Control Module Transmission Range Select Performance. Common causes: transmission control module malfunction, wiring harness problems. Estimated repair cost: $56–278.
Symptoms
- Incorrect gear shifting
- Check Engine Light Illuminates
- Transmission transition to emergency mode
- Difficulty shifting gears
- Power Loss
Causes
- Transmission control module malfunction
- Wiring Harness Problems
- Selector lever position sensor malfunction
- Mechanical damage in the switching system
- Outdated ECU software
How to Fix
- Check error codes in the ECU memory
- Inspect the wiring harness and module connectors
- Check the gear selector position sensor
- Update ECU software
- If necessary, replace the control module
Related codes
Error P27B1 by Vehicle Brand
FAQ
What does the P27B1 code mean?
P27B1 is an OBD-II diagnostic trouble code that indicates: Internal Control Module Transmission Range Select Performance
What causes a P27B1 error code?
The most common causes of P27B1 include: Transmission control module malfunction; Wiring Harness Problems; Selector lever position sensor malfunction; Mechanical damage in the switching system.
How do I fix a P27B1 diagnostic trouble code?
To fix P27B1: Check error codes in the ECU memory. Inspect the wiring harness and module connectors. Check the gear selector position sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P27B1?
Do not drive — repair immediately
How much does it cost to fix P27B1?
The estimated repair cost for P27B1 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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