P27B2 — Internal Control Module Transmission Range Control Performance

What Does P27B2 Mean?

P27B2 is a diagnostic trouble code indicating: Internal Control Module Transmission Range Control Performance. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P27B2

⚠️ Check Engine Light (MIL) illuminated
⚠️ Internal Control Module Transmission Range Control not meeting expected output
⚠️ Degraded performance of related system
⚠️ Reduced engine performance

Common Causes

🔍 Internal Control Module Transmission Range Control degraded from age or contamination
🔍 Mechanical wear in Internal Control Module Transmission Range Control or related parts
🔍 Restriction or blockage affecting Internal Control Module Transmission Range Control
🔍 Calibration drift in Internal Control Module Transmission Range Control

Frequently Asked Questions

What does P27B2 mean?

P27B2 indicates: Internal Control Module Transmission Range Control Performance. The vehicle's computer has detected that the Internal Control Module Transmission Range Control is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P27B2?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P27B2 for extended periods may cause additional problems.

How much does it cost to fix P27B2?

Repair costs for P27B2 typically range from $50 to $400, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect Internal Control Module Transmission Range Control for contamination or wear
🔧 Replace Internal Control Module Transmission Range Control
🔧 Address any related mechanical faults

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P27B2: Internal Control Module Transmission Range Control Performance