DTC P0098; Pcm IAT Sensor No. 2 Circuit High Input: Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSE

DTC P0098:00	IAT sensor No. 2 circuit high input
DETECTION CONDITION	If the PCM detects that the IAT sensor No. 2 voltage at the PCM terminal 1CE is 4.96 V or more for 5 s, the PCM determines that the IAT sensor No. 2 circuit voltage is high. Diagnostic support note This is a continuous monitor (CCM). The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	MAP sensor/IAT sensor No. 2 connector or terminals malfunction PCM connector or terminals malfunction IAT sensor No. 2 malfunction Short to power supply in wiring harness between MAP sensor/IAT sensor No. 2 terminal B and PCM terminal 1CE Open circuit in wiring harness between the following terminals: MAP sensor/IAT sensor No. 2 terminal B-PCM terminal 1CE MAP sensor/IAT sensor No. 2 terminal A-PCM terminal 1BX PCM malfunction

CAUTION:

Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.

Related PIDs

Item (definition)	Unit/Condition	Definition	Condition/Specification (Reference)
IAT2	°C, °F	Intake air temperature (No. 2)	Displays IAT (No. 2)
IAT2	V	IAT sensor No. 2 voltage	IAT2 is 20 °C {68 °F}: Approx. 3.57 V IAT2 is 40 °C {104 °F}: Approx. 2.70 V IAT2 is 60 °C {140 °F}: Approx. 1.87 V