P1112 Cadillac Code - Intake Air Temperature Sensor Circuit Intermittent Low Voltage
Quick Answer
The P1112 diagnostic trouble code for Cadillac vehicles indicates an issue with the Intake Air Temperature (IAT) sensor circuit having intermittent low voltage. Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged or corroded wiring in the sensor circuit, Loose or disconnected connectors in the sensor circuit. 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
- P1112 Cadillac indicates Intake Air Temperature Sensor Circuit Intermittent Low Voltage.
- Common causes
- Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged or corroded wiring in the sensor circuit, Loose or disconnected connectors in the sensor circuit.
- 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 P1112 Cadillac Description
The P1112 diagnostic trouble code for Cadillac vehicles indicates an issue with the Intake Air Temperature (IAT) sensor circuit having intermittent low voltage. The IAT sensor is a crucial component of the engine management system, as it measures the temperature of the air entering the engine. This information is vital for the engine control unit (ECU) to adjust the air-fuel mixture for optimal combustion.
Common Causes of P1112 Cadillac
- Faulty Intake Air Temperature (IAT) sensor
- Damaged or corroded wiring in the sensor circuit
- Loose or disconnected connectors in the sensor circuit
- Malfunctioning Engine Control Unit (ECU)
- Intermittent electrical issues
Symptoms of P1112 Cadillac
- Decreased fuel efficiency
- Rough or erratic idling
- Hesitation or lack of power during acceleration
- Engine stalling or misfiring
- Check Engine Light illuminated
How to Fix P1112 Cadillac
- Begin by conducting a visual inspection of the wiring and connectors in the IAT sensor circuit. Look for any signs of damage, corrosion, or loose connections. Repair or replace any faulty components.
- Test the IAT sensor using a multimeter to verify its functionality. If the sensor is faulty, replace it with a new one.
- Clear the diagnostic trouble codes stored in the ECU using an OBD-II scanner. Drive the vehicle to see if the P1112 code returns.
- If the code persists, perform a thorough inspection of the ECU and related components to identify any underlying issues. Replace or repair as necessary.
- After completing the repairs, test drive the vehicle to ensure that the symptoms associated with the P1112 code have been resolved.
Cost to Fix P1112 Cadillac
The typical repair costs for addressing the P1112 code on a Cadillac vehicle can vary depending on the specific cause of the issue. Replacement IAT sensors usually range from $20 to $50, while labor costs can vary from $80 to $150 per hour. Overall, the total repair cost for this issue could range from $100 to $300, including parts and labor. It is important to note that these are rough estimates, and actual costs may differ based on the vehicle's make and model, as well as the location and labor rates of the auto repair shop.
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