P0C20 — Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open

What Does P0C20 Mean?

P0C20 is a diagnostic trouble code indicating: Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P0C20

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Electric/Auxiliary Transmission Fluid Pump Phase U-V-W readings
⚠️ Related system operating intermittently
⚠️ System warning light illuminated

Common Causes

🔍 Wiring issue in Electric/Auxiliary Transmission Fluid Pump Phase U-V-W circuit (damaged, chafed, or corroded)
🔍 Faulty Electric/Auxiliary Transmission Fluid Pump Phase U-V-W connector or terminal
🔍 Failed Electric/Auxiliary Transmission Fluid Pump Phase U-V-W
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P0C20 mean?

P0C20 indicates: Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open. The vehicle's computer has detected that the Electric/Auxiliary Transmission Fluid Pump Phase U-V-W is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P0C20?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P0C20 for extended periods may cause additional problems.

How much does it cost to fix P0C20?

Repair costs for P0C20 typically range from $80 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 and repair Electric/Auxiliary Transmission Fluid Pump Phase U-V-W wiring and connectors
🔧 Replace faulty Electric/Auxiliary Transmission Fluid Pump Phase U-V-W

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.

P0C20: Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open