P01E7: Engine Coolant Temperature Sensor 3 Circuit Intermittent/Erratic

Severity

Medium

System

Fuel and Air Metering

Last reviewed: Jan 1, 0001 Last updated: Jan 1, 0001

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does P01E7 Mean?

P01E7 is a diagnostic trouble code indicating: Engine Coolant Temperature Sensor 3 Circuit Intermittent/Erratic. This code relates to the fuel and air metering system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P01E7

⚠️ Check Engine Light (MIL) illuminated
⚠️ Engine Coolant Temperature Sensor 3 signal cutting in and out
⚠️ Related system working sometimes but not consistently
⚠️ Poor fuel economy

Common Causes

🔍 Loose or intermittent connection at Engine Coolant Temperature Sensor 3
🔍 Wire chafing causing intermittent contact
🔍 Engine Coolant Temperature Sensor 3 failing under heat or vibration
🔍 Corroded connector pins with partial contact

Frequently Asked Questions

What does P01E7 mean?

P01E7 indicates: Engine Coolant Temperature Sensor 3 Circuit Intermittent/Erratic. The vehicle's computer has detected that the Engine Coolant Temperature Sensor 3 is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P01E7?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P01E7 for extended periods may cause additional problems.

How much does it cost to fix P01E7?

Repair costs for P01E7 typically range from $30 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 reseat all Engine Coolant Temperature Sensor 3 connectors
🔧 Repair chafed or damaged wiring in Engine Coolant Temperature Sensor 3 circuit
🔧 Replace Engine Coolant Temperature Sensor 3 if failing intermittently

1
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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.