P27A6 — Electric/Auxiliary Transmission Fluid Pump B Stuck On

What Does P27A6 Mean?

P27A6 is a diagnostic trouble code indicating: Electric/Auxiliary Transmission Fluid Pump B Stuck On. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P27A6

⚠️ Check Engine Light (MIL) illuminated
⚠️ Electric/Auxiliary Transmission Fluid Pump B remains active when it should be off
⚠️ Related system running continuously
⚠️ Reduced engine performance

Common Causes

🔍 Electric/Auxiliary Transmission Fluid Pump B mechanically stuck in active position
🔍 Short circuit holding Electric/Auxiliary Transmission Fluid Pump B control on
🔍 Faulty Electric/Auxiliary Transmission Fluid Pump B driver circuit in ECM/PCM

Frequently Asked Questions

What does P27A6 mean?

P27A6 indicates: Electric/Auxiliary Transmission Fluid Pump B Stuck On. The vehicle's computer has detected that the Electric/Auxiliary Transmission Fluid Pump B is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P27A6?

Only short distances if absolutely necessary. P27A6 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix P27A6?

Repair costs for P27A6 typically range from $50 to $300, 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 Electric/Auxiliary Transmission Fluid Pump B for mechanical binding or debris
🔧 Replace stuck Electric/Auxiliary Transmission Fluid Pump B
🔧 Check Electric/Auxiliary Transmission Fluid Pump B control circuit for short

1
Find your vehicle above
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2
Check for recalls
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P27A6: Electric/Auxiliary Transmission Fluid Pump B Stuck On