P27B5
Internal Control Module Transmission Gear Ratio Control Performance
P27B5 is an OBD-II diagnostic trouble code meaning: Internal Control Module Transmission Gear Ratio Control Performance. Common causes: control module software failure, module hardware failure. Estimated repair cost: $89–278.
Symptoms
- Incorrect gear shifting
- Jerks when switching
- Transmission slipping
- Switching to emergency mode
- Check engine light comes on
Causes
- Control module software failure
- Module hardware failure
- Damage to the wiring to the module
- Module power problems
- Contact corrosion
How to Fix
- Diagnostics of the control module using a scanner
- Checking the integrity of wiring and contacts
- Checking module power and grounding
- Module software update
- Replacing the control module if necessary
Related codes
Error P27B5 by Vehicle Brand
FAQ
What does the P27B5 code mean?
P27B5 is an OBD-II diagnostic trouble code that indicates: Internal Control Module Transmission Gear Ratio Control Performance
What causes a P27B5 error code?
The most common causes of P27B5 include: Control module software failure; Module hardware failure; Damage to the wiring to the module; Module power problems.
How do I fix a P27B5 diagnostic trouble code?
To fix P27B5: Diagnostics of the control module using a scanner. Checking the integrity of wiring and contacts. Checking module power and grounding. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P27B5?
Do not drive — repair immediately
How much does it cost to fix P27B5?
The estimated repair cost for P27B5 is $89–278. Actual cost depends on your vehicle, location, and labor rates.
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