P1110

Intake air temperature sensor circuit malfunction - dynamic chamber

Detection Conditions

• Intake air temperature (dynamic chamber) sensor signal is below 0.1V or above 4.9V while the intake air temperature (air cleaner) sensor reads above -10 degrees C.
• Intake air temperature (dynamic chamber) is higher than engine coolant temperature by 40 degrees C, engine coolant temperature is above 70 degrees C, and ignition key is ON.

Diagnostic Support Notes

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

Possible Causes

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

[P1110 - From 2002 Mazda Millenia factory service manual]