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OBD-II Trouble Shooting Got a code reader? Find out what your GM car's Check Engine light is trying to tell you (and then turn Check Engine light off).

 
 
 
 
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Old 09-24-2009, 04:35 PM   #1
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Default P0113

P0113

Description
IAT SENSOR CIRCUIT HIGH VOLTAGE

Intake Air Temperature (IAT) sensor is a thermistor that
varies resistance based on temperature. As temperature of sensor
increases, resistance decreases. Low temperature will result in a high
signal voltage. DTC will set when PCM sees an IAT sensor voltage of
greater than 5 volts.

Symptoms
SES Service Engine Soon light

Causes
  • Defective IAT sensor
  • Loose or corroded connection at IAT sensor
  • Open in IAT ground circuit or signal circuit
  • Short to voltage in IAT signal circuit or reference circuit
  • IAT harness and/or wiring routed too close to high-voltage wiring such as alternator, spark plug cables, etc.
Possible Solutions
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