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2002 CHEVROLET IMPALA

3.8L V6FWDAUTOMATICgas
7 active safety recalls on this vehicle — view recalls
Repairs0Labor477Torque4866Fluid6DTC745Battery1Maintenance0Recalls7
P1112low severityPowertrain

IAT Sensor Circuit Intermittent Low Voltage

on 2002 Chevrolet Impala 3.8L V6 · FWD

What this code means

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.

Other Powertrain codes on this vehicle

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