P0114 — Intake Air Temperature Circuit Intermittent Bank 1

OBD2 code P0114 flags a problem with the throttle and intake air metering (intake air temperature circuit intermittent bank 1). Short, gentle driving to a shop is usually possible. Common culprits: faulty throttle position sensor or pedal sensor, contaminated or failed MAF/MAP sensor, dirty throttle body or stuck throttle plate.

powertrain (engine/transmission)

Is it safe to drive?

Drive cautiously if symptoms are mild P0114 is usually not an emergency when the check engine light is the only symptom, but the erratic IAT signal can affect cold-start fueling. Avoid aggressive driving and schedule diagnosis promptly; do not continue driving if the engine stalls, runs roughly, or enters reduced-power mode.

Typical symptoms

Check engine light illuminated with P0114 stored in the powertrain controller
IAT value on an OBD scan changes abruptly or behaves inconsistently during a cold start
Mild hesitation, unstable idle, or reduced cold-start performance when the signal becomes erratic
Short-term fuel trims may appear higher than expected when the ECM/PCM receives an implausible IAT value
P0114 may be stored without any noticeable drivability symptom
Severe electrical faults can contribute to stalling, although this is less common with P0114

Common causes

Intermittent connection or terminal tension problem at the Bank 1 intake air temperature (IAT) sensor connector
Chafed, damaged, moisture-contaminated, or intermittently open wiring in the IAT sensor circuit
Bank 1 IAT sensor with an unstable internal element that produces erratic readings as it warms
Loose or corroded power, ground, or signal connection used by the IAT sensor, depending on vehicle design
Contamination or water intrusion near the IAT sensor that alters its resistance or connection quality
Intermittent input, reference voltage, or ground fault at the ECM/PCM side of the IAT circuit

How to diagnose with an OBD scanner

Capture P0114 and freeze-frame data Connect an OBD scanner such as ELM327 or AIScanAuto, read the stored DTCs, and save P0114 freeze-frame information before clearing anything. Record whether the code is confirmed, pending, or historical and note ambient temperature, engine speed, and operating conditions.
Monitor the live IAT reading With a cold engine, compare the scanner's IAT data, if supported, with the actual intake-air temperature. The reading should rise gradually as the sensor warms. Watch for sudden jumps, values equal to the default backup temperature, or readings that change while the engine remains stationary.
Inspect the IAT connector and harness Locate the Bank 1 intake air temperature sensor, inspect its connector and wiring, and look for spread terminals, corrosion, coolant or oil contamination, trapped moisture, and chafing. Gently move the connector and harness while monitoring the live IAT value to expose an intermittent P0114 condition.
Test the sensor and circuit Follow manufacturer-specific test procedures for the sensor resistance, reference voltage, signal voltage, and ground. If the sensor is disconnected, compare its resistance with the specified temperature range. Do not jump ECM/PCM pins; unstable IAT data usually points to the sensor, connector, wiring, or shared reference connection.
Repair and verify the fault Repair damaged wiring, clean and secure the connector, or replace the IAT sensor as testing indicates. Clear P0114 only after the repair, then repeat a cold start and warm-up while monitoring live IAT data. Confirm that the value changes smoothly and that P0114 does not return as pending or confirmed.

Approximate repair cost

A typical independent-shop range for diagnosing and repairing P0114 is USD $150-$500, depending on whether the sensor, connector, or wiring requires service. These figures are estimates and vary by region.

Common questions

Does P0114 mean the intake air is actually too hot?

No. P0114 identifies an intermittent electrical fault in the Bank 1 IAT circuit, not a confirmed overheat condition. The ECM/PCM may be receiving an unstable or implausible sensor signal.

Can I drive my vehicle with P0114 stored?

If P0114 is the only symptom and the engine runs normally, cautious driving to a repair facility is generally reasonable. Stop driving promptly if stalling, severe hesitation, or other major drivability problems appear.

Is replacing the IAT sensor always the fix for P0114?

Not always. The code can be caused by an unstable sensor, but corroded terminals, poor terminal tension, moisture, or damaged wiring can create the same intermittent signal and should be inspected first.

Why does P0114 return after the code is cleared?

P0114 can return when an intermittent connector, wiring, or sensor fault appears again during a warm-up cycle. Inspect and wiggle-test the circuit while monitoring live IAT data before replacing parts or clearing the code again.

The engine control unit (ECU) logs trouble code P0114 when it detects an irregular or flickering signal from the intake air temperature sensor on Bank 1. This sensor measures the temperature of incoming air entering the engine, and the ECU uses that data to fine-tune the air-fuel mixture and adjust for density changes. When the signal drops out momentarily or behaves erratically instead of holding steady, the module registers the fault and illuminates the Check Engine light after confirming the condition meets its internal criteria. P0114 is a powertrain-class code, which means it relates directly to engine and drivetrain operation rather than chassis or body systems.

Bank 1 simply refers to the engine bank that contains cylinder number one—on V-style engines, this is the side with that cylinder; on inline engines, Bank 1 is the only bank. Locating cylinder one beforehand prevents misdiagnosis on vehicles with two banks. The ECU does not flag P0114 from a single bad reading; it waits until the intermittent fault repeats under specific load, speed, and temperature conditions. This is why the freeze frame data stored alongside the code is so valuable—it captures the exact operating environment when the failure occurred, giving you a starting point that matches real-world conditions rather than guesswork.

Common Symptoms

The throttle pedal feels unresponsive or sluggish when you press it
The idle speed fluctuates or runs higher than normal without settling
The engine stalls when you slow down or come to a complete stop
The Check Engine light is illuminated on the dashboard
The vehicle enters reduced-power limp-home mode, limiting acceleration
The accelerator pedal may feel stiff or not return smoothly

Typical Causes

A throttle body clogged with carbon deposits or a binding throttle plate
A failed or weakening electronic throttle motor unable to move the plate
A defective throttle position sensor sending inaccurate voltage signals
Intake manifold vacuum leaks located downstream of the mass airflow sensor
Wiring damage, corroded pins, or loose connectors in the throttle control circuit
A faulty accelerator pedal position sensor feeding bad data to the ECU

How to Diagnose

Plug in an OBD2 scanner and retrieve all stored codes. Record P0114 and any related codes, then save the freeze frame data showing engine load, RPM, coolant temperature, and vehicle speed at the moment the fault triggered.
Cross-reference that freeze frame data with any open technical service bulletins for your make and model. Manufacturers occasionally publish updates, revised calibrations, or known defects with documented solutions that a scan tool cannot provide.
Perform a hands-on inspection of the wiring harness and electrical connectors feeding the throttle body and intake air temperature circuit. Look for frayed wires, broken insulation, moisture intrusion, bent terminals, or any sign of heat damage.
Remove the throttle body and physically examine the plate and bore for heavy carbon buildup. Clean the unit with appropriate throttle-body cleaner, verify the plate swings freely by hand, and reinstall with a new gasket.
Monitor throttle position and mass airflow readings in live data mode while operating the accelerator pedal through its full range. Both values should transition smoothly without sudden drops or spikes.
Clear the code, then complete a drive cycle that reproduces the conditions recorded in the freeze frame. If P0114 reappears, the fault is confirmed and component-level testing is next.

Repair Options and Pricing

Throttle body cleaning alone resolves many intermittent P0114 faults and runs $80 to $200 when performed at an independent shop.

Replacing a faulty mass airflow or manifold absolute pressure sensor—components upstream of the intake tract that can trigger the same circuit behavior—costs roughly $150 to $400 for parts and labor.

If the throttle body itself has failed electrically or mechanically, a complete assembly replacement typically falls between $250 and $700 depending on vehicle make and model.

Total Repair Cost

For most vehicles, addressing P0114 costs somewhere between $80 and $700 depending on which part is actually responsible. The cleaning route is the least expensive and often the first logical step. Sensor replacement sits in the middle range, while a full throttle body swap represents the highest-end scenario. Spending time on accurate diagnosis before purchasing parts almost always saves money, since the most expensive fix is rarely the one causing the problem.

Can You Drive with P0114?

Drive with caution when this code is active. Many throttle-related faults force the ECU into limp-home mode, which restricts engine power but still allows enough operation to reach a repair facility—highway merging or spirited driving is not advisable in this state. If the engine stalls repeatedly or the accelerator pedal becomes unresponsive, stop driving immediately and have the vehicle towed. Do not ignore persistent stalling or a sudden loss of throttle authority, as those conditions compromise safety in traffic.