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Home/DTC Codes/Chevrolet/Impala/2000-2005 3.8L V6/P1112
P1112

IAT Sensor Circuit Intermittent Low Voltage

2000-2005 Chevrolet Impala 3.8L V6

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

  1. Wiggle test IAT connector
  2. Inspect wiring for shorts to ground
  3. Test IAT sensor resistance
  4. 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

P1112 on Other Vehicles

Chevrolet Astro

1995-2005 4.3L V6 Vortec

Chevrolet Avalanche

2002-2006 5.3L V8 Vortec

Chevrolet Avalanche

2002-2006 8.1L V8 Vortec

Chevrolet Avalanche

2007-2013 5.3L V8 Vortec

Chevrolet Avalanche

2007-2013 6.0L V8 Vortec

Chevrolet Aveo

2012-2018 1.6L I4

Chevrolet Beat

2018-2021 1.2L I4

Chevrolet Beretta

1990-1996 2.2L I4

Common Questions

What does code P1112 mean on a 2000-2005 Chevrolet Impala?

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 Chevrolet Impala?

Common symptoms of P1112 include: Check Engine Light (intermittent), Incorrect fueling calculations, Intermittent performance issues.

What causes P1112 on a 2000-2005 Chevrolet Impala?

Common causes of P1112 include: Shorted IAT sensor wiring, Faulty IAT sensor, Water intrusion in connector, Chafed wiring.

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