P0098 Code - Intake Air Temperature Sensor 2 Circuit High

Discussion in 'P - Powetrain Codes' started by fault code, Dec 6, 2017.

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  1. fault code

    fault code Administrator Staff Member

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    What Does P0098 Mean?

    P0098 is the OBD-II generic code indicating the engine control module (ECM) has determined that the intake air temperature sensor 2 (IAT2) has an open circuit in the sensor circuit.

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    What are the common causes of P0098 ?

    The most common cause of this code is an IAT sensor that has been left unplugged after replacing the air filter. Other possible causes are a faulty IAT sensor (usually near the air filter housing), faulty electrical wiring or connectors, a faulty PCM.

    What are the symptoms of P0098 ?

    Aside from the MIL, and depending on failure mode, you may note poor engine performance, particularly on acceleration, though you may not notice anything while cruising or at low speeds. Some ECMs may internally substitute a certain temperature reading in its calculations, which may enable the vehicle to run, although you may still experience rough idle, hesitation on acceleration, perhaps a random misfire.

    How do you troubleshoot P0098 ?

    Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

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