P0098 — Intake Air Temperature Sensor 2 Circuit High Bank 1

OBD2 code P0098 flags a problem with the throttle and intake air metering (intake air temperature sensor 2 circuit high bank 1). Short, gentle driving to a shop is usually possible. Common culprits: contaminated or failed MAF/MAP sensor, dirty throttle body or stuck throttle plate, intake air leaks after the MAF sensor.

powertrain (engine/transmission)

Is it safe to drive?

Diagnose P0098 promptly P0098 is usually not an immediate stop condition, but the false high signal can cause rough running, stalling, poor fuel control, or reduced power. If the engine runs smoothly, drive only as needed to obtain service and avoid extended operation while the fault remains active.

Typical symptoms

Check-engine light remains on with P0098 stored in the powertrain control module
Scanner data for Bank 1 Intake Air Temperature Sensor 2 reads implausibly high or stays near the circuit maximum
Engine warm-up timing is abnormal even though the intake air is cool
Rough idle, hesitation, surging, or stalling may occur
Engine power may feel reduced or may fluctuate as the control module corrects the false temperature
Fuel trim or mixture behavior may become noticeably uneven

Common causes

Intake Air Temperature Sensor 2 on Bank 1 has an internal failure that drives its signal above the expected range
Sensor signal wire is shorted to battery voltage or another constant-voltage circuit
Corroded, loose, or water-contaminated connector allows the high signal condition to occur
Chafed or damaged wiring near the intake duct exposes the signal circuit to the wrong voltage
Open sensor ground, high-resistance ground connection, or failed sensor pull-up circuit
Powertrain control module reference or ground fault affecting the Bank 1 Sensor 2 circuit
Incorrectly installed or mismatched replacement sensor with an unsuitable resistance curve

How to diagnose with an OBD scanner

Confirm the fault with live data Connect an OBD2 scanner such as ELM327 or AIScanAuto, read stored and pending codes, and inspect live Intake Air Temperature Sensor 2 data for Bank 1. Compare the displayed value with ambient temperature and charge-air temperature; a sudden maximum reading or a large disagreement confirms an electrical signal problem rather than genuinely hot intake air.
Identify and inspect the correct sensor Use the vehicle service wiring diagram to locate Bank 1 Intake Air Temperature Sensor 2, since sensor numbering and physical positions vary. Inspect the connector, locking tab, sensor body, wiring loom, and nearby intake duct for corrosion, moisture, damaged terminals, pin pushed back, or chafing.
Verify supply and ground Back-probe the connector with the ignition commanded on and the engine off. Verify the manufacturer-specified reference voltage, commonly 5 V, and an intact ground path. If the sensor uses a two-wire thermistor arrangement, check its pull-up supply and ground instead; do not assume a separate 5 V reference circuit exists.
Test the high-voltage circuit Measure the signal voltage and compare it with the service specification. Check the signal path for continuity to battery voltage, a 5 V rail, or ground. With the sensor disconnected, repeat the relevant checks to distinguish a shorted harness from a sensor that is internally pulling the circuit high.
Repair and validate the correction Repair damaged wiring or terminals, clean and reseat the connector, or replace Bank 1 Intake Air Temperature Sensor 2 with the correct specified part. Clear P0098 with the scanner, complete a drive cycle, and confirm that the live temperature value changes plausibly and the code does not return.

Approximate repair cost

A typical independent-shop range for P0098 diagnosis and a Bank 1 Intake Air Temperature Sensor 2 or minor wiring repair is about USD $120-$450. Figures are estimates and vary by region, vehicle difficulty, and shop.

Common questions

Does P0098 mean the engine is actually receiving extremely hot intake air?

No. P0098 normally means the Bank 1 Sensor 2 electrical signal is above the control module's expected range; the intake air may be completely cool.

Can the vehicle still be driven with P0098 stored?

Usually, yes, especially if idle and power remain normal, but rough running, stalling, or a power loss should be diagnosed before continuing to drive.

Is replacing the intake air temperature sensor always enough?

No. A shorted signal wire, damaged connector, poor ground, or control module reference fault can also produce P0098 and must be checked first.

Will clearing the code permanently correct P0098?

Clearing the code only resets the monitor. It will return if the high sensor signal or its underlying wiring, connector, or ground fault remains.

When your OBD2 scanner pulls code P0098, the engine computer has detected a problem with the throttle and intake air metering system operating outside its designed parameters. P0098 stands for "Intake Air Temperature Sensor 2 Circuit High Bank 1," which falls under the powertrain category covering engine and transmission-related faults. The onboard control module keeps tabs on this system every time you drive, logging data and watching for readings that stray beyond acceptable limits.

Understanding the terminology matters here. "Bank 1" refers to the engine bank containing cylinder number one, while "Sensor 2" indicates the downstream sensor positioned after the catalytic converter. DIY mechanics frequently confuse these positions, leading to unnecessary part replacements. Always confirm the actual physical location of the affected sensor on your specific vehicle before purchasing any components.

Once the module identifies readings that fall outside the expected range for enough consecutive drive cycles, it stores P0098 and illuminates the check engine light. The stored freeze frame data captures the exact operating conditions at the moment the fault occurred—engine speed, load percentage, temperature readings, and vehicle speed. This snapshot becomes your starting point for tracking down the root cause.

Common Symptoms of P0098

The throttle and intake air metering system plays a critical role in how your engine runs, so when something goes wrong with it, you'll likely notice one or more of these telltale signs:

Engine stalls as you approach a stop
Vehicle enters limp-home mode with noticeably reduced power output
Check Engine Light remains illuminated on the dashboard
Idle quality suffers—either rough, unstable, or higher than normal
Throttle response feels sluggish or unresponsive when pressing the accelerator

What Causes P0098?

Several underlying issues can trigger code P0098. The most frequent culprits tend to involve either physical component failures or the intake system's integrity being compromised:

Unmetered air entering the intake tract after the MAF sensor, creating a lean condition the computer cannot correct
Complete failure of the electronic throttle motor responsible for plate movement
Wiring harness or electrical connector problems in the throttle control circuit, including damaged insulation, corroded terminals, or loose connections
MAF or MAP sensor contamination, buildup, or outright failure affecting accurate airflow measurement
Faulty throttle position sensor or accelerator pedal position sensor sending incorrect data to the ECU

How to Diagnose P0098

A systematic approach prevents misdiagnosis and wasted money. Follow these steps to pinpoint the actual cause of P0098:

Connect your OBD2 scanner and verify that P0098 is currently stored. Download and save the freeze frame data—this records exactly what the engine was doing when the fault was detected and guides your testing.
Look for any accompanying trouble codes. Related codes often point directly to the failing component. Check for relevant technical service bulletins (TSBs) for your vehicle make and model, as manufacturers sometimes publish known issues with factory remedies or software updates.
Perform a thorough visual inspection of all wiring and connectors associated with the throttle body and intake air metering system. Look for damaged wires, corroded pins, chafed insulation, or connectors that aren't fully seated.
Remove and inspect the throttle body itself. Check that the throttle plate moves freely without binding, and clean carbon deposits if present using appropriate throttle body cleaner.
Monitor live data streams while manually operating the accelerator. Throttle position sensor readings and MAF/MAP sensor values should change smoothly and proportionally to pedal movement.
Clear the stored code and complete a full drive cycle that recreates the conditions shown in the freeze frame data. If P0098 returns, you've confirmed an active fault requiring repair.

How to Fix P0098

Addressing the most probable causes first saves both time and money. The following repair approaches correspond directly to the root causes listed above:

Throttle body assembly replacement — $250–$700
MAF or MAP sensor replacement — $150–$400
Throttle body cleaning service — $80–$200

How Much Does It Cost to Fix P0098?

Total repair costs for P0098 vary depending on which component actually failed. At independent repair shops in the United States, including both parts and labor, expect these typical scenarios:

Throttle body assembly replacement typically runs between $250 and $700 depending on your vehicle and location. MAF or MAP sensor replacement generally costs $150 to $400 for most applications. If a professional cleaning resolves the issue, you're looking at $80 to $200.

Overall, fixing P0098 usually falls somewhere between $80 and $700. The most important takeaway: get an accurate diagnosis before buying parts. Throwing expensive components at a problem without confirming they're actually faulty rarely ends well for your wallet.

Can You Drive with P0098?

Drive with caution when P0098 is active. Many throttle-related faults force the engine control module into limp-home mode, which limits power output significantly. This reduced-power state gets you safely to a repair facility but makes highway driving dangerous or impossible. If your engine stalls repeatedly or the accelerator pedal stops responding entirely, do not continue driving—pull over and arrange a tow instead.