P1114 — Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B Circuit Low Input

What Does P1114 Mean?

P1114 is a manufacturer-specific diagnostic trouble code: Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B Circuit Low Input. This code applies to FORD, OTHER, LINCOLN, MERCURY, OLDSMOBILE vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1114

⚠️ Check Engine Light (MIL) illuminated
⚠️ Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B reading at zero or minimum value
⚠️ Related system not functioning or in fail-safe mode
⚠️ Reduced engine performance

Common Causes

🔍 Open or broken wire in Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B circuit
🔍 Poor ground connection at Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B
🔍 Faulty Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B with no output signal
🔍 Disconnected or loose Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P1114 mean?

P1114 indicates: Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B Circuit Low Input. The vehicle's computer has detected that the Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1114?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1114 for extended periods may cause additional problems.

How much does it cost to fix P1114?

Repair costs for P1114 typically range from $20 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

🔧 Repair broken wire or restore ground in Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B circuit
🔧 Clean and secure Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B connector and ground points
🔧 Replace failed Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B

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2
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3
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A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P1114: Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage IAT - B Circuit Low Input