P0097 — Intake Air Temperature Sensor 2 Circuit Low Bank 1

P0097 — Intake Air Temperature Sensor 2 Circuit Low Bank 1. A fault in the throttle and intake air metering. Short, gentle driving to a shop is usually possible. Typical causes: wiring or connector faults in the throttle circuit, intake air leaks after the MAF sensor, faulty throttle position sensor or pedal sensor.

powertrain (engine/transmission)

Is it safe to drive?

Caution: repair P0097 promptly P0097 can usually be driven while the engine runs smoothly, but incorrect mixture control may cause rough idle, misfire, elevated fuel consumption, or stalling. Avoid continued operation if the engine loses significant power, stalls, or runs unusually rich.

Typical symptoms

The check-engine light illuminates with P0097 stored in the powertrain control module.
The engine may run slightly rich, producing a strong fuel odor or unusually high fuel consumption.
A rough idle, hesitation during acceleration, or reduced engine power may accompany P0097.
Hard starting, stalling, or operation in reduced-power mode can occur when the control module receives an incorrect temperature signal.

Common causes

The Intake Air Temperature Sensor 2 signal wire for P0097 is shorted to ground or intermittently grounded.
Intake Air Temperature Sensor 2 has failed internally and is reporting an implausibly low signal.
A corroded or loose sensor connector is interrupting the 5-volt reference, ground, or signal circuit.
Damage to the wiring harness between Intake Air Temperature Sensor 2 and the powertrain control module is causing a low-voltage condition.
The powertrain control module has an internal fault in the P0097 sensor input after the wiring and sensor have been verified.

How to diagnose with an OBD scanner

Confirm P0097 with an OBD2 scanner Connect an ELM327 adapter, AIScanAuto, or another OBD2 scanner and read the powertrain trouble codes. Confirm that P0097 is current or pending, and record freeze-frame data. If supported, monitor the Intake Air Temperature Sensor 2 PID; a generic scanner may not display this manufacturer-specific reading.
Identify the correct sensor Use the vehicle wiring diagram to locate Intake Air Temperature Sensor 2 for the P0097 Bank 1 circuit. Do not assume it is in the same place as sensor 1, because multiple intake-air temperature sensors may monitor different portions of the air path.
Inspect the connector and harness Disconnect the sensor and examine its terminals for corrosion, bent pins, water intrusion, or green contamination. Inspect the wiring near the connector for chafing, pinching, or a short to ground, and repair damaged sections before replacing the sensor.
Perform a back-probe voltage test With the ignition on, back-probe the sensor 2 signal, 5-volt reference, and ground circuits. If reference and ground are correct but the signal remains below the manufacturer-specified range, the sensor or a signal-wire short is likely. If reference voltage is missing, trace the wiring and powertrain control module connection.
Check the reported temperature Compare the P0097 sensor 2 scan data with the expected intake temperature and manufacturer specifications. A temperature that is implausibly low can result from an internally shorted sensor, while a correct temperature with a low circuit diagnosis points toward a connector, wiring, or control-module input problem.
Repair and verify the circuit Repair the wiring or connector, or replace Intake Air Temperature Sensor 2 with the correct part. Clear P0097, operate the engine through a complete warm-up cycle, and verify that the temperature reading is plausible and that the code does not return.

Approximate repair cost

A typical independent-shop estimate for diagnosing P0097 and replacing Intake Air Temperature Sensor 2 is $120-$400 USD. Extensive connector or harness repair can raise the total to approximately $400-$700 USD. Figures are estimates and vary by region.

Common questions

What does code P0097 mean?

P0097 means the powertrain control module is receiving an abnormally low signal from Intake Air Temperature Sensor 2 on the Bank 1 circuit.

Can I safely drive with P0097?

You can usually drive with P0097 if the engine runs smoothly, but stalling, misfires, or substantial power loss should be investigated before continuing.

Does P0097 always mean the temperature sensor is bad?

No. P0097 can also result from a shorted signal wire, damaged connector, poor ground, or a powertrain control module input fault.

How much does it cost to repair P0097?

Independent-shop repairs commonly fall around $120-$400 USD for sensor replacement and basic diagnosis, with wiring or connector work potentially costing more.

P0097: Intake Air Temperature Sensor 2 Circuit Low Bank 1

When your engine control module decides something is wrong with the intake air temperature sensor on bank 1, it sets trouble code P0097. This specific fault means the voltage signal from sensor 2 — the downstream sensor positioned after the catalytic converter — has dropped below the minimum acceptable threshold. The PCM expects a certain voltage range based on incoming air temperature; when that signal collapses, the computer registers a problem and stores the code.

Bank 1 simply refers to the engine bank that contains cylinder number one. Mixing up which bank or which sensor position you're dealing with is a frequent source of wasted money and frustration. Before touching any component, confirm the physical location of the part your vehicle actually uses. The control module does not forgive assumptions. It logs this fault only after the abnormal reading persists through enough drive cycles to confirm it's not a random electrical hiccup, and at that point it saves freeze frame data — a snapshot of RPM, engine load, coolant temperature, and vehicle speed at the exact moment the problem was detected. That snapshot is your best starting point for figuring out what actually broke.

Symptoms of P0097

When P0097 is active, you may notice one or more of the following:

Throttle response feels sluggish or delayed compared to normal operation
Idle speed becomes unstable, fluctuating, or runs noticeably higher than specified
The engine stalls when you slow to a stop or come to idle
The vehicle enters limp-home mode, restricting power output significantly
The check engine light remains illuminated on the dashboard

What Causes P0097?

The underlying culprits behind P0097 typically fall into a few predictable categories:

Air leaks occurring downstream of the mass airflow sensor, allowing unmetered air to skew sensor readings
Wiring or connector problems in the throttle and intake air circuit, including damaged insulation, corroded pins, or loose plugs
A contaminated or outright failed MAF or MAP sensor producing inaccurate voltage output
Carbon buildup on the throttle body or a throttle plate that is stuck and not moving freely
Poor electrical grounds causing intermittent or permanently low voltage signals

How to Diagnose P0097

Follow these steps in order to narrow down the root cause without replacing parts unnecessarily:

Plug in an OBD2 scanner, retrieve P0097 from the memory, and record the freeze frame data — note the conditions under which the fault triggered.
Scan for any other stored trouble codes; related codes often point directly to the failing component. Check manufacturer TSBs for your specific make and model — factory-issued bulletins sometimes describe known issues or software updates.
Perform a thorough visual inspection of the wiring harness and electrical connectors tied to the throttle and intake air system, looking for chafed wires, corrosion, or pins that are not fully seated.
Remove the throttle body from the intake and inspect it for carbon deposits; clean the bore and verify the throttle plate moves through its full range without binding.
Monitor live data for throttle position and MAF/MAP sensor voltage while commanding the throttle — values should respond smoothly and fall within the expected range for your vehicle.
Clear P0097 from the ECU, complete a drive cycle that reproduces the conditions from the freeze frame, and verify the code does not return.

Repair Options and Costs

Work through the cheapest fixes first before committing to expensive replacements:

MAF or MAP sensor replacement: $150–$400 for parts and labor
Throttle body cleaning: $80–$200 for parts and labor
Throttle body assembly replacement: $250–$700 for parts and labor

The total bill for resolving P0097 typically lands somewhere between $80 and $700 depending on which part is actually at fault. Spending time on a proper diagnosis before buying components almost always costs less than guessing wrong on a throttle body or sensor.

Driving Safety Verdict: Caution

Drive with caution when P0097 is stored. Many throttle-related faults force the PCM into limp-home mode, cutting engine power to a level that gets you to a repair facility but is unsuitable for highway merging or sustained high-speed travel. If the engine stalls completely or the accelerator pedal loses responsiveness entirely, stop driving immediately and have the vehicle towed. Continuing under those conditions is unsafe for you and other drivers.