P0110

Intake air temperature (IAT) sensor circuit malfunction - air filter box

Detection Conditions

• The signal from the intake air temperature sensor to the ECU falls below 0.1V or rises above 4.9V
• The intake air temperature reads higher than the engine coolant temperature by more than 40 degrees C while the ignition is in the ON position

Diagnostic Support Notes

• This is a continuous monitor (CCM)
• Check engine indicator illuminates if ECU detects the above malfunction condition during the first drive cycle
• PENDING CODE data is not available
• FREEZE FRAME DATA is available
• DTC is stored in ECU memory

Possible Causes

• Intake air temperature sensor malfunction
• Short to ground circuit between IAT sensor terminal A and ECU
• IAT signal circuit and IAT ground circuit are shorted
• Poor connection at IAT sensor or ECU connector
• ECU malfunction
• Open circuit between IAT sensor terminal A and ECU
• Short to power circuit between IAT sensor terminal A and ECU
• Open circuit between IAT sensor terminal B and ECU
• Short to power circuit between IAT sensor terminal B and ECU

[P0110 - From 2002 Mazda Millenia factory service manual]