P1118 Ford Code - Manifold Absolute Temperature Circuit Low Input
Quick Answer
The P1118 Ford diagnostic trouble code (DTC) indicates a low input signal from the Manifold Absolute Temperature (MAT) sensor circuit. Common causes include Faulty Manifold Absolute Temperature (MAT) sensor, Wiring or connector issues in the MAT sensor circuit, ECM software or hardware malfunction. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1118 Ford indicates Manifold Absolute Temperature Circuit Low Input.
- Common causes
- Common causes include Faulty Manifold Absolute Temperature (MAT) sensor, Wiring or connector issues in the MAT sensor circuit, ECM software or hardware malfunction.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1118 Ford Description
The P1118 Ford diagnostic trouble code (DTC) indicates a low input signal from the Manifold Absolute Temperature (MAT) sensor circuit. The MAT sensor is responsible for measuring the temperature of the air entering the engine's intake manifold. This information is crucial for the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. A low input signal from the MAT sensor can lead to incorrect fuel delivery, affecting engine performance and emissions.
Common Causes of P1118 Ford
- Faulty Manifold Absolute Temperature (MAT) sensor
- Wiring or connector issues in the MAT sensor circuit
- ECM software or hardware malfunction
- Vacuum leaks in the intake manifold
- Engine overheating affecting MAT sensor readings
Symptoms of P1118 Ford
- Engine running lean or rich
- Decreased fuel efficiency
- Rough idling or stalling
- Check Engine Light illuminated
- Reduced engine power
How to Fix P1118 Ford
- Begin by diagnosing the issue with a scan tool to confirm the P1118 code.
- Inspect the MAT sensor and its wiring for any visible damage or corrosion. Replace if necessary.
- Check the intake manifold for any vacuum leaks and repair as needed.
- Clear the DTC and perform a test drive to ensure the code does not return.
- If the issue persists, further diagnosis may be required to pinpoint the root cause.
Cost to Fix P1118 Ford
The typical repair costs for addressing a P1118 Ford code can vary depending on the specific cause and parts required. On average, the cost for parts such as a new MAT sensor can range from $50 to $150. Labor costs can add an additional $80 to $150 per hour, with the total repair bill potentially amounting to $150 to $500 or more. It's advisable to consult with a qualified mechanic or auto repair shop to obtain an accurate estimate based on the vehicle's make and model, as well as the local labor rates.
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