P1114 — IAT - B Sensor Intermittent

OBD2 code P1114 flags a problem with the sensor and actuator circuits (IAT - b sensor intermittent). The car is usually drivable while you plan the repair. Common culprits: blown fuse feeding the circuit, corroded, loose or damaged connector, faulty sensor or actuator of the affected circuit.

Meaning for brands

Chery

For Ford vehicles

intake air temperature b circuit

powertrain (engine/transmission)

Is it safe to drive?

Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm P1114 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the IAT - b sensor intermittent for damage, corrosion, chafing or poor contact.
Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P1114 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P1114 (parts and labor, USD, independent shop rates): Replace the faulty sensor or actuator: $150–$500; Control module repair: $300–$1,000; Repair wiring or connectors: $80–$250. Overall, fixing P1114 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

What is the most common cause of P1114?

The most common causes are: blown fuse feeding the circuit, corroded, loose or damaged connector, faulty sensor or actuator of the affected circuit.

What are the symptoms of P1114?

Drivers most often notice: Check Engine Light on, increased fuel consumption in some cases, possible limp mode depending on the affected component, the affected system operates intermittently or not at all.

How do I diagnose P1114 myself?

Start with a scan: confirm P1114, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the sensor and actuator circuits, and verify the suspect component against live data before buying parts.

How much does it cost to fix P1114?

Replace the faulty sensor or actuator — $150–$500; Control module repair — $300–$1,000; Repair wiring or connectors — $80–$250. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What does OBD2 code P1114 mean?

P1114 is an OBD2 trouble code that indicates the Engine Control Unit has detected an intermittent problem with the intake air temperature sensor — specifically the "B" circuit. When the PCM sees signals that suddenly spike, drop, or vanish without explanation, it flags this fault and illuminates the Check Engine light. The intermittent nature of P1114 makes it trickier to catch than a hard failure, since the sensor may work perfectly during your drive to the shop.

This code falls under the powertrain category, meaning it relates directly to engine and transmission operation. To set P1114, the control module monitors the IAT sensor voltage over multiple drive cycles, comparing real-time readings against factory-defined acceptable ranges. When the signal behaves erratically — flipping between valid data and open circuit readings — the PCM logs the code along with a freeze frame snapshot. That snapshot captures engine RPM, load percentage, coolant temperature, and vehicle speed at the exact moment the fault occurred, giving you a head start on pinpointing the cause.

The affected system is the intake air temperature sensor, which helps the engine computer calculate air density for proper fuel delivery. An intermittent failure means your car might run fine one moment and poorly the next, depending on whether the sensor is communicating properly at that instant.

Symptoms of P1114

The Check Engine light appears on the dashboard. In some vehicles, fuel economy drops noticeably because the PCM relies on faulty air temperature data to calculate fuel injector pulse width. Partial limp-home mode may engage, limiting power or disabling certain auxiliary functions depending on which circuit is affected. The IAT sensor circuit operates inconsistently or stops sending data entirely until the wiring issue resolves itself — which may happen briefly and then recur.

Common Causes

Loose, corroded, or damaged connectors at the IAT sensor often produce exactly this kind of intermittent behavior. Wiring that has chafed through, been chewed by rodents, or suffered heat damage can short or open intermittently as the harness moves. A blown fuse feeding the affected circuit removes power entirely, sometimes restoring it when the fuse cools and makes partial contact again. The control module itself may have an internal driver failure that manifests inconsistently. Finally, the IAT sensor itself can fail internally, sending garbled signals that come and go depending on temperature and vibration.

Diagnosing P1114

Connect an OBD2 scanner and verify that P1114 is stored in the ECU. Save the freeze frame data before clearing anything — those recorded engine conditions often point you toward the failure scenario. Next, scan for any related trouble codes; multiple codes in the same circuit usually indicate the actual problem area. Checking manufacturer TSB databases for your specific make, model, and model year is worthwhile since many intermittent sensor codes have documented factory fixes or software recalibrations. Visually inspect the entire wiring harness feeding the IAT B sensor, looking for broken insulation, bent pins, green corrosion buildup, or any sign of moisture intrusion at connectors. Use a multimeter to verify reference voltage, good ground continuity, and clean signal at the sensor connector while the engine idles. Finally, perform a wiggle test on the harness while monitoring live data — any signal dropouts confirm a broken wire or loose terminal that needs repair.

Repair Options and Costs

If the sensor itself is defective, replacement runs $150–$500 depending on vehicle make and sensor type. Control module diagnosis and repair typically costs $300–$1,000, as it may require reflashing, module exchange, or dealer-level programming. Wiring and connector repairs — including harness replacement, terminal repair kits, or connector replacement — generally cost $80–$250.

Total Repair Cost

For most vehicles, the total bill for fixing P1114 falls between $80 and $1,000 depending on root cause. Independent shop labor rates typically add $75–$125 per hour. Starting with visual inspection and electrical testing before purchasing any parts is the smart approach — many intermittent codes turn out to be simple wiring or connector issues that cost far less than a new sensor or module.

Can You Drive With P1114?

P1114 is classified as a short-term drivable fault in most vehicles. Your car will continue operating, though you may notice slight performance degradation or slightly higher fuel consumption. However, if the intermittent failure causes stalling, a no-start condition, or triggers warnings affecting braking or steering systems, treat it as an urgent repair and stop driving until the issue is diagnosed.