P1112
IAT Sensor Circuit Intermittent Low Voltage
2004-2007 Buick Rainier 4.2L I6
Low SeverityPowertrain
Description
The PCM detected intermittent low voltage on the Intake Air Temperature sensor circuit, indicating a sporadic short to ground.
Symptoms
- Check Engine Light (intermittent)
- Incorrect fueling calculations
- Intermittent performance issues
Common Causes
- Shorted IAT sensor wiring
- Faulty IAT sensor
- Water intrusion in connector
- Chafed wiring
Diagnostic Steps
- Wiggle test IAT connector
- Inspect wiring for shorts to ground
- Test IAT sensor resistance
- Check for water in connector
Repair Notes
Repair shorted wiring or replace IAT sensor.
Related Codes
P0110Intake Air Temperature (IAT) Sensor 1 CircuitP0112IAT Sensor 1 Circuit Low InputP1111IAT Sensor Circuit Intermittent High VoltageP1111IAT Sensor Circuit Intermittent High VoltageP1111IAT Sensor Circuit Intermittent High VoltageP1111IAT Sensor Circuit Intermittent High VoltageP1111IAT Sensor Circuit Intermittent High VoltageP1111IAT Sensor Circuit Intermittent High VoltageP1111IAT Sensor Circuit Intermittent High VoltageP1111IAT Sensor Circuit Intermittent High VoltageP1111Intake Air Temperature Sensor Circuit Low/IntermittentP1111Intake Air Temperature Sensor Circuit Low/IntermittentP1111Intake Air Temperature Sensor Circuit Low/Intermittent
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1112 on Other Vehicles
Common Questions
What does code P1112 mean on a 2004-2007 Buick Rainier?
P1112 stands for "IAT Sensor Circuit Intermittent Low Voltage". The PCM detected intermittent low voltage on the Intake Air Temperature sensor circuit, indicating a sporadic short to ground.
What are the symptoms of P1112 on a Buick Rainier?
Common symptoms of P1112 include: Check Engine Light (intermittent), Incorrect fueling calculations, Intermittent performance issues.
What causes P1112 on a 2004-2007 Buick Rainier?
Common causes of P1112 include: Shorted IAT sensor wiring, Faulty IAT sensor, Water intrusion in connector, Chafed wiring.