P26D3 — Engine Coolant Pump Supply Voltage Circuit

What Does P26D3 Mean?

P26D3 is a diagnostic trouble code indicating: Engine Coolant Pump Supply Voltage Circuit. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P26D3

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Engine Coolant Pump Supply Voltage readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in Engine Coolant Pump Supply Voltage circuit (damaged, chafed, or corroded)
🔍 Faulty Engine Coolant Pump Supply Voltage connector or terminal
🔍 Failed Engine Coolant Pump Supply Voltage
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P26D3 mean?

P26D3 indicates: Engine Coolant Pump Supply Voltage Circuit. The vehicle's computer has detected that the Engine Coolant Pump Supply Voltage is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P26D3?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P26D3 for extended periods may cause additional problems.

How much does it cost to fix P26D3?

Repair costs for P26D3 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 Engine Coolant Pump Supply Voltage wiring and connectors
🔧 Replace faulty Engine Coolant Pump Supply Voltage

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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.

P26D3: Engine Coolant Pump Supply Voltage Circuit