B2307 — footwell output air temperature sensor – short to ground

B2307: B2307 is a short-to-ground fault in the footwell output air temperature sensor circuit and generally affects cabin temperature control rather than engine operation.

For Ford vehicles

footwell output air temperature sensor – short to ground

vehicle

Is it safe to drive?

Usually drivable, but climate control may be unreliable B2307 is a short-to-ground fault in the footwell output air temperature sensor circuit and generally affects cabin temperature control rather than engine operation. You can usually drive to a repair shop, but if the heater or defroster cannot maintain visibility, reduce speed, use alternative defrost methods, and address the fault promptly.

Typical symptoms

The HVAC system may show an incorrect footwell outlet temperature, often an abnormally cold reading.
The blower can run while the cabin fails to reach the selected heater or air-conditioning temperature.
Automatic climate control may stay at one setting, cycle unexpectedly, or continuously request heat or cooling.
B2307 may be stored as a current, pending, or history code in the body or HVAC controller.
Defrost or cabin-temperature behavior can change when the sensor wiring is exposed to moisture or movement.

Common causes

Internal short to ground inside the footwell output air temperature sensor.
Chafed or damaged sensor signal wiring contacting the vehicle body or another grounded component.
Water intrusion or corrosion at the footwell output air temperature sensor connector creating a leakage path to ground.
A loose, cracked, or incorrectly installed sensor plug with a terminal backed out of the connector.
Damage to HVAC module-side wiring or connector pins can leave the B2307 sensor circuit shorted to ground.

How to diagnose with an OBD scanner

Verify the code with a scan tool Connect an OBD2 scanner such as an ELM327 adapter with AIScanAuto, provided the tool supports the vehicle's body and HVAC modules. Record whether B2307 is current, pending, or historic, and save freeze-frame data before clearing anything.
Inspect the sensor and connector Locate the footwell output air temperature sensor and its electrical connector on or near the HVAC outlet. Examine the plug, terminals, and wiring for water, corrosion, pin damage, chafing, or a connector that is not fully seated.
Measure the sensor circuit Use the vehicle wiring diagram to identify the sensor signal and ground pins. Back-probe the signal at the connector and compare its voltage with the expected value; a signal held near zero volts or continuity to chassis ground supports the B2307 short-to-ground condition.
Separate the sensor from the wiring Disconnect the sensor and repeat the voltage or continuity checks. If the signal returns to its expected range, the sensor or connector is likely at fault. If the circuit remains grounded with the sensor unplugged, inspect the harness and module-side connector for B2307-related damage.
Repair and verify the repair Replace the footwell output air temperature sensor or repair the affected wires and connector, then clear the code with the OBD2 scanner. Monitor live temperature data and verify that the heater, air conditioner, and defroster respond normally.

Approximate repair cost

Estimated independent-shop range: approximately $120–$450 USD for diagnosis and a typical footwell output air temperature sensor replacement or localized wiring and connector repair. These figures are estimates, not verified quotes, and vary by region, vehicle access, and the extent of harness damage.

Common questions

Does B2307 prove that the temperature sensor is bad?

No. B2307 identifies a short-to-ground condition in the footwell output air temperature sensor circuit; the sensor, connector, wiring, or a module-side connection can be responsible.

Can I drive with B2307 stored?

Usually, because B2307 generally affects cabin temperature measurement rather than engine control. Avoid driving if the heater or defroster cannot maintain visibility, and have the short diagnosed promptly.

How is a B2307 short-to-ground fault tested?

Read B2307 with an OBD2 scanner, then test the sensor connector and signal wiring with a multimeter. A low signal voltage or continuity to chassis ground helps separate a sensor failure from a harness short.

Will replacing the sensor clear B2307?

Replacing the sensor may fix B2307 only if the sensor's internal electronics caused the short. Inspect and test the connector and wires first, because clearing the code without correcting the ground path will allow it to return.

B2307 — B2307 — Manufacturer Controlled DTC: Causes, Symptoms & Fix

When your scan tool pulls code B2307, it's telling you the vehicle's computer has detected a problem within the body electrical system. B2307 is a manufacturer-controlled diagnostic trouble code, which means the fault falls under the vehicle's body control architecture rather than the powertrain. The control module monitors circuits related to door locks, windows, lighting, wipers, and similar comfort and convenience features, flagging any reading that falls outside its expected range.

To trigger B2307, the module must observe the fault condition across multiple drive cycles—a single glitch won't set it. When it does fire, the ECU captures a freeze frame snapshot, recording engine RPM, load percentage, coolant temperature, and vehicle speed at the exact moment of failure. That data is invaluable during diagnosis because it shows you exactly what conditions the vehicle was under when the problem appeared.

Body control module faults, damaged wiring in door jambs or areas prone to moisture intrusion, and failed switches, motors, or actuators account for the majority of B2307 cases. Blown fuses, bad relays, and corroded or loose connectors also make the list. Starting with the most frequent culprits saves time and money—expensive component replacement is rarely the first step worth taking.

Symptoms of B2307

The most common symptom is straightforward: the affected system—whether it's the power locks, windows, interior lighting, or wipers—stops working or operates intermittently. In most cases, the engine runs and drives completely normally; B2307 has no bearing on throttle response, transmission behavior, or emissions control. You may also see a warning light illuminate on the dashboard, though many body codes illuminate no dedicated lamp. Pay close attention to which specific function has quit, as that narrows the circuit you need to investigate.

Common Causes

The causes below are ordered from most to least likely based on real-world repair data:

Faulty body control module (BCM) unable to process signals correctly
Wiring damage in door jambs, tailgate hinges, or other flex points where wires bend repeatedly
Water intrusion into connectors or wiring, leading to corrosion or short circuits
Failed switch, motor, or actuator within the affected subsystem
Blown fuse or failed relay feeding the circuit
Loose or oxidized connectors with poor terminal contact
Chafed wiring harness insulation from rubbing against metal body panels

How to Diagnose B2307

Begin every B2307 investigation by connecting an OBD2 scanner and confirming the code is stored, then save the freeze frame data before clearing anything. Those engine condition readings tell you whether the fault occurred at idle, highway speed, or during a specific maneuver, which often points toward the real problem.

Check for related diagnostic trouble codes next. A B2307 frequently accompanies other body-system codes that expose the underlying cause—for instance, a switch failure might generate codes for each circuit it controls. Also look up technical service bulletins (TSB) for your specific make, model, and year on the manufacturer website or NHTSA database; manufacturers often publish known issues and software updates that resolve persistent B0xxx codes without any parts replacement.

Perform a thorough visual inspection of the wiring harness and connectors tied to the malfunctioning system. Look for frayed insulation, broken strands, corrosion buildup on terminals, and any signs of water damage. Pay special attention to flex points—door jambs and tailgate hinges experience constant movement, and wires break there first.

Use your scanner's live data function to monitor switch inputs and motor outputs while operating the failed component. A switch that shows no state change in the data stream even when physically actuated points directly at that switch. Conversely, if the switch signal changes but the motor PID does not, the problem lies downstream in the motor or its control circuit.

After clearing the code, complete a full drive cycle that recreates the conditions recorded in the freeze frame. Watch whether B2307 returns. If it does, you have confirmed an active fault rather than a one-time electrical hiccup, and the diagnostic path is now clear.

Repair Options and Costs

Address inexpensive possibilities before committing to major part purchases. Wiring repairs or connector remediation typically run $80 to $250 depending on access and the extent of the damage. A body control module itself—repair or full replacement—commands $300 to $900 in most markets. Replacing a failed switch, motor, or actuator generally falls between $120 and $450, again depending on the part and labor time.

Across all scenarios, B2307 repair costs fall somewhere between $80 and $900 total. An accurate diagnosis before buying parts prevents unnecessary expense; the most expensive fix is almost never the first one worth trying.

Can You Drive with B2307?

In the vast majority of cases, B2307 poses no drivability concern—your engine, transmission, and brakes remain unaffected. The practical risks are limited to the failed function itself: non-working exterior lights reduce visibility to other drivers, inoperable wipers become hazardous in rain or snow, and a central locking fault could leave the vehicle unsecured. Drive cautiously and prioritize getting the fault diagnosed and repaired before it creates a safety issue.