P1111 KIA Possible Causes

• Faulty intake air temperature sensor
• Intake air temperature sensor harness is open or shorted
• Poor electrical connection in intake air temperature sensor circuit

How to Fix P1111 KIA Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

The P1111 code is set when the Powertrain Control Module (PCM) detects a signal voltage outside the normal operating range of the sensor.

Possible Symptoms

Illuminated check engine light (or service engine soon warning light)

P1111 KIA Meaning

The Intake Air Temperature (IAT) sensor contains a semiconductor device that changes resistance based on temperature (a thermistor). The IAT sensor is mounted in the air intake passage of the engine’s air intake system. The IAT sensor has a signal circuit and a ground circuit. The Powertrain Control Module (PCM) applies a voltage (approximately 5.0 volts) to the sensor’s signal circuit. The PCM monitors changes in this voltage caused by changes in the sensor’s resistance to determine the intake air temperature.

When the intake air is cold, the sensor resistance (thermistor) is high and the PCM signal voltage is only slightly lowered across the sensor to ground. The PCM detects a high signal voltage (low temperature). When the intake air is hot, the sensor resistance is low and the signal voltage is lowered more significantly. This causes the PCM to detect a low signal voltage (high temperature).

P1111 NISSAN Possible Causes

• Faulty intake valve timing control solenoid valve, bank 1
• Intake valve timing control solenoid valve harness for bank 1 is open or shorted
• Poor electrical connection in the intake valve timing control solenoid valve circuit, bank 1

How to Fix P1111 NISSAN Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What Does It Mean?

Since the intake valve timing control solenoid valve uses oil flow to control timing, dirty oil can cause the valve to stick open or closed. Before replacing the valve, change the engine oil and filter and reset the engine code. If the code returns, you can remove the intake valve timing control solenoid and clean it with brake cleaner.

Possible Symptoms

Engine light on (or service engine soon warning light)
Possible engine power loss/lack of power
Possible rough engine idle

P1111 NISSAN Meaning

The intake valve timing control solenoid valve is activated by on/off pulse signals (duty ratio) from the engine control module (ECM). The intake valve timing control solenoid valve changes the amount of oil and direction of flow through the intake valve timing control unit or stops the oil flow.

Longer pulse width advances the valve angle. Shorter pulse width retards the valve angle.

When the ON and OFF pulse widths become equal, the solenoid valve stops the oil pressure flow to lock the intake valve angle at the control position.

The diagnostic trouble code (DTC) is set when incorrect voltage is sent to the ECM through the intake valve timing control solenoid valve.

P1111 PONTIAC Possible Causes

• Faulty intake air temperature sensor
• Intake air temperature sensor harness is open or shorted
• Poor electrical connection in the intake air temperature sensor circuit

How to Fix P1111 PONTIAC Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

The P1111 code is set when the Powertrain Control Module (PCM) detects a signal voltage that is higher than the normal operating range of the sensor.

Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P1111 PONTIAC Meaning

The Intake Air Temperature (IAT) sensor contains a semiconductor device that changes resistance based on temperature (a thermistor). The IAT sensor is mounted in the air intake passage of the engine’s air intake system. The IAT sensor has a signal circuit and a ground circuit. The Powertrain Control Module (PCM) applies a voltage (approximately 5.0 volts) to the sensor’s signal circuit. The PCM monitors changes in this voltage caused by changes in the sensor’s resistance to determine the intake air temperature.

When the intake air is cold, the sensor’s resistance (thermistor) is high and the PCM signal voltage is only slightly lowered across the sensor to ground. The PCM detects a high signal voltage (low temperature). When the intake air is hot, the sensor’s resistance is low and the signal voltage is lowered more. This causes the PCM to detect a low signal voltage (high temperature).

P1111 SATURN Possible Causes

• Faulty intake air temperature sensor
• Intake air temperature sensor harness is open or shorted
• Poor electrical connection in the intake air temperature sensor circuit

How to Fix P1111 SATURN Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

The P1111 code is set when the Powertrain Control Module (PCM) detects a signal voltage outside the normal operating range of the sensor.

Possible Symptoms

Illuminated check engine light (or service engine soon warning light)

P1111 SATURN Meaning

The Intake Air Temperature (IAT) sensor contains a semiconductor device that changes resistance based on temperature (a thermistor). The IAT sensor is mounted in the air intake passage of the engine’s air intake system. The IAT sensor has a signal circuit and a ground circuit. The Powertrain Control Module (PCM) applies a voltage (approximately 5.0 volts) to the sensor’s signal circuit. The PCM monitors changes in this voltage caused by changes in the sensor’s resistance to determine the intake air temperature.

When the intake air is cold, the sensor’s resistance (thermistor) is high and the PCM signal voltage is only slightly lowered across the sensor to ground. The PCM detects a high signal voltage (low temperature). When the intake air is hot, the sensor’s resistance is low and the signal voltage is lowered more. This causes the PCM to detect a low signal voltage (high temperature).

P1111 SUBARU Possible Causes

• Intake system
• Faulty engine control module (ECM)
• Engine control module harness is open or shorted
• Poor electrical connection in engine control module circuit

How to Fix P1111 SUBARU Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What Does It Mean?

The atmospheric pressure sensor is integrated into the engine control module (ECM) and cannot be serviced separately. The engine control module uses sensor inputs such as intake air pressure, intake air temperature, and throttle position to calculate an atmospheric pressure reading.

Possible Symptoms

Check engine light on (or service engine soon warning light)

P1111 SUBARU Meaning

This sensor measures the atmospheric pressure the vehicle is experiencing. The diagnostic trouble code (DTC) sets when the engine control module (ECM) detects a high voltage signal from the atmospheric pressure sensor.

P1111 SUZUKI Possible Causes

• Faulty intake air temperature sensor
• Intake air temperature sensor harness is open or shorted
• Poor electrical connection in the intake air temperature sensor circuit

How to Fix P1111 SUZUKI Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding cable harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

The P1111 code is set when the Powertrain Control Module (PCM) detects a signal voltage outside the normal operating range of the sensor.

Possible Symptoms

Illuminated check engine light (or service engine soon warning light)

P1111 SUZUKI Meaning

The Intake Air Temperature (IAT) sensor contains a semiconductor device that changes resistance based on temperature (a thermistor). The IAT sensor is mounted in the air intake passage of the engine’s air intake system. The IAT sensor has a signal circuit and a ground circuit. The Powertrain Control Module (PCM) applies a voltage (approximately 5.0 volts) to the sensor’s signal circuit. The PCM monitors changes in this voltage caused by changes in the sensor’s resistance to determine the intake air temperature.

When the intake air is cold, the sensor’s resistance (thermistor) is high and the PCM signal voltage is only slightly lowered across the sensor to ground. The PCM detects a high signal voltage (low temperature). When the intake air is hot, the sensor’s resistance is low and the signal voltage is lowered more. This causes the PCM to detect a low signal voltage (high temperature).

P1111 VOLKSWAGEN Possible Causes

• Faulty HO2 Sensor, Bank 1
• HO2 Sensor Harness, Bank 1 is open or shorted
• Poor electrical connection in HO2 Sensor circuit, Bank 1

How to Fix Volkswagen P1111 Code?

Start by checking the “Possible Causes” listed above. Visually inspect the corresponding cable harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Check Engine Light On (or Service Engine Soon Warning Light)

P1111 VOLKSWAGEN Meaning

HO2S Control Bank 1 System Too Lean is the generic description for Volkswagen code P1111, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about the Volkswagen P1111 OBDII code.

P1111 VOLVO Possible Causes

• Faulty outside temperature sensor
• Outside temperature sensor harness is open or shorted
• Poor electrical connection in the outside temperature sensor circuit

How to Fix P1111 VOLVO Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P1111 VOLVO Meaning

The engine control module (ECM) monitors the outside temperature sensor. If the control module receives a signal from the outside temperature sensor corresponding to a temperature below -39°C (-38.2°F) (low signal) or above +129°C (264.2°F) (high signal), the control module interprets this as a fault and the diagnostic trouble code (DTC) is stored.

P1112 Possible Causes

• Faulty intake air temperature sensor
• Intake air temperature sensor harness is open or shorted
• Poor electrical connection in the intake air temperature sensor circuit
• Damaged powertrain control module (PCM)

How to Fix Code P1112?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What Does It Mean?

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with mass air flow sensor cleaner. Reset the code and drive the vehicle. If the code returns, the mass air flow sensor may need to be replaced. Monitor the IAT on a scan tool. Look for sudden changes in the reading when the harness is shaken or the sensor is tapped.

Possible Symptoms

Illuminated check engine light (or service engine soon warning light)

P1112 Meaning

The IAT sensor is a thermistor device where resistance changes with temperature. The electrical resistance of a thermistor decreases as temperature increases and resistance increases as temperature decreases. The variable resistance affects the voltage drop across the sensor terminals and provides electrical signals to the powertrain control module (PCM) corresponding to the temperature.
Thermistor-type sensors are considered passive sensors. A passive sensor is connected to a voltage divider network so that the change in the passive sensor’s resistance causes a change in the total current flow. The voltage that drops across a fixed resistor in series with the sensor resistance determines the voltage signal to the PCM. This voltage signal equals the reference voltage minus the voltage drop across the fixed resistor.

The IAT sensor provides air temperature information to the PCM. The PCM uses air temperature information as a correction factor in calculating fuel, spark, and air flow.

The IAT sensor provides faster response time to temperature change than the ECT or CHT sensor.

Currently, there are 2 types of IAT sensors used, a standalone, non-integrated type and an integrated type. Both types function the same way, but the integrated type is incorporated into the mass air flow (MAF) sensor instead of being a standalone sensor.

P1112 FORD Possible Causes

• Faulty intake air temperature sensor
• Intake air temperature sensor harness is open or shorted
• Poor electrical connection in the intake air temperature sensor circuit
• Damaged powertrain control module (PCM)

How to Fix P1112 FORD Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Illuminated check engine light (or service engine soon warning light)

P1112 FORD Meaning

The IAT sensor is a thermistor device where resistance changes with temperature. The electrical resistance of a thermistor decreases as temperature increases and resistance increases as temperature decreases. The variable resistance affects voltage drop across the sensor terminals and provides electrical signals to the powertrain control module (PCM) corresponding to temperature.
Thermistor-type sensors are considered passive sensors. A passive sensor is connected to a voltage divider network so that variation in the passive sensor’s resistance causes a change in the total current flow. The voltage that drops across a fixed resistor in series with the sensor resistance determines the voltage signal to the PCM. This voltage signal equals the reference voltage minus the voltage drop across the fixed resistor.

The IAT sensor provides air temperature information to the PCM. The PCM uses air temperature information as a correction factor in calculating fuel, spark, and airflow.

The IAT sensor provides faster response time to temperature change than the ECT or CHT sensor.

Currently, there are 2 types of IAT sensors used – a standalone, non-integrated type and an integrated type. Both types function the same way, but the integrated type is incorporated into the mass airflow sensor (MAF) instead of being a standalone sensor.