P0715 Code: Honda Civic (2022-2024) - Causes, Symptoms & Fixes

No recalls found in NHTSA database

This diagnostic guide applies to P0715 (Input/Turbine Speed Sensor Circuit Malfunction) on 2022–2024 Honda Civic models. The data provided above shows no NHTSA owner complaints or official recalls for this exact Make/Model/Year/Issue combination. The guide uses a combination of general automotive knowledge and typical diagnostic practices for P0715 in CVT Hondas, with clear notes on data limitations.

CODE MEANING AND SEVERITY

• What the code means: P0715 stands for Input/Turbine Speed Sensor Circuit Malfunction. In most vehicles, this is the transmission’s input speed sensor circuit—the sensor monitors the speed of the transmission’s input/turbine shaft and feeds that data to the transmission control module (TCM) or engine control module (ECM) to help manage gear selection and shift timing.
• In a Honda Civic with a CVT, the sensor and its wiring provide essential data for proper gear/ratio control and may influence behavior like shift feel, torque delivery, and idle/drive signal processing.
• Severity and typical impact: When P0715 is stored, you can expect at least MIL illumination and potential drivability symptoms such as hard shifts, delayed or no shifting, limp-home behavior, or abnormal speedometer readings. The vehicle may enter a degraded mode to protect the transmission, and drivability can be reduced. In many cases, the issue is related to an electrical problem (sensor or wiring) rather than a catastrophic internal transmission failure, but extended operation with a fault code can lead to damage if left unaddressed.

COMMON CAUSES ON HONDA CIVIC

• Faulty input speed sensor (sensor itself) or sensor signal wiring
• Damaged or corroded sensor connector, wiring harness, or poor terminal engagement
• Open or short in the sensor circuit (power, ground, or signal)
• Faulty or stuck transmission control module (TCM)/ECM communication or calibration issue
• Low, dirty, or contaminated transmission CVT fluid (or wrong fluid type) affecting sensor readings or transmission operation
• Internal transmission issues interpreted by the TCM as a sensor circuit fault (e.g., worn gear mesh, turbine/impeller issues, or valve body concerns in some CVTs)
• Electrical issues such as a blown fuse related to the sensor circuit or a faulty ground
• Aftermarket modifications or damaged wiring from road debris or prior repairs

Note: On a 2022–2024 Civic with CVT, the situation is frequently sensor- or wiring-related, but CVT fluid health can mimic or exacerbate sensor-related symptoms. Always verify fluid condition and connections before assuming a sensor replacement fixes the issue.

SYMPTOMS

• MIL (Check Engine Light) or transmission fault indicator illuminated
• Erratic or harsh shifting, delayed engagement, or inability to select certain gears
• Transmission may go into limp mode or refuse to shift properly
• Speedometer readings that do not match vehicle speed, or fluctuating speed signal
• Vehicle may feel underpowered or hesitate during acceleration
• In some cases, no driveability symptoms beyond an intermittent MIL

DIAGNOSTIC STEPS

Note: Perform basic safety precautions first. If you aren’t comfortable with complex electrical testing or transmission diagnostics, consult a professional.

A. Confirm the code and gather data

• Use a capable OBD-II scanner to confirm P0715 and check for any related codes (P0710–P0716 family codes, other transmission codes, or sensor-related codes).
• Review freeze-frame data and live data. Note the transmission input speed reading, engine RPM, and vehicle speed under various load conditions.

B. Inspect the obvious

• Check transmission fluid level and condition. With a CVT, the correct fluid type and level are crucial. Look for dark, burnt smell, metallic debris, or milky appearance (contamination).
• Inspect the transmission area for fluid leaks, burnt components, or heat damage.
• Visually inspect the Input Speed Sensor connector and wiring harness at the transmission:
  • Look for damaged insulation, frayed wires, bent pins, corrosion, moisture, or loose connectors.
  • Disconnect and inspect the sensor connector for corrosion or bent terminals; reseat firmly if needed.
  • If the vehicle has a visible TCM or control module in the path of sensor wiring, inspect for bent harnesses or disturbed grounds.

C. Electrical tests (sensor circuit)

• With ignition off, locate the Input Speed Sensor (from the service manual, wiring diagram, or a reputable source for the Civic CVT).
• Check sensor wiring for continuity to the TCM/ECM and to ground/power as applicable.
• Check the sensor connector for proper voltage supply and ground when the ignition is on (may require a service manual or schematic; typically, a 5V reference from the control module and a ground are involved for many automotive speed sensors).
• Conduct resistance/continuity checks on the sensor itself if you have the spec. Compare readings to Honda’s service data. If the sensor shows open circuit, short to ground, or readings far outside spec, replace the sensor.
• Use a live data scan tool to monitor the input speed sensor value while revving the engine or cruising. The sensor data should change smoothly with engine speed and should align with engine RPM and vehicle speed (within the sensor’s designed range). If the sensor reading is erratic, flatlined, or inconsistent with actual RPM, suspect the sensor or wiring.

D. Check for related system issues

• Check for software/TCM updates or reprograms (dealer service may have calibrated or updated the TCM/ECM if there are published updates for your VIN). While this is not a recall, a dealer service bulletin or update can exist.
• Check for fuse integrity related to the transmission control circuits and confirm proper grounding.
• If sensor and wiring check out, but the fault persists, consider transmission internal concerns (gear mesh, turbine/impeller conditions) as a possibility noted by the TCM. This typically requires professional diagnosis.

E. Road test and correlation

• After any sensor/wiring repair or fluid service, perform a careful road test in multiple driving conditions (light throttle, steady cruise, slight uphill) to confirm whether the P0715 code returns and whether shifts and response have improved.
• If the code returns immediately or after a short drive, re-check wiring connections and consider alternative causes (TCM, internal transmission concerns).

F. When to escalate

• If you cannot locate a clear sensor/wiring fault, or if the vehicle continues to exhibit symptoms even after sensor replacement, consult a transmission-qualified technician. Advanced tests (e.g., voltage/ground checks at multiple pins, TCM communication tests, or an internal transmission inspection) may be necessary.

RELATED CODES

• P0710 Input/Turbine Speed Sensor Circuit Malfunction
• P0711 Input/Turbine Speed Sensor Circuit Range/Performance
• P0712 Input/Turbine Speed Sensor Circuit No Output
• P0713 Input/Turbine Speed Sensor Circuit No Signal
• P0714 Input/Turbine Speed Sensor Circuit No Signal or Not Used (variant naming by some OEMs)
• P0716 Input/Turbine Speed Sensor Circuit Range/Performance (some systems)
• P0700–P0702 and other generic transmission codes can appear in the same fault cluster; investigate any additional codes for a complete picture.

REPAIR OPTIONS AND COSTS (2025 prices)

Prices vary by region, dealer vs independent shop, and parts availability. The following are typical ranges to give you a ballpark reference.

• Input/Turbine Speed Sensor replacement (sensor only)

  • Parts: roughly $20–$100
  • Labor: roughly $60–$150
  • Total: roughly $80–$250

• Sensor wiring harness repair or connector replacement

  • Parts: $20–$200 (harness section or connectors)
  • Labor: $60–$250
  • Total: $80–$450

• Transmission Control Module (TCM/ECM) testing or reflashing/recall-like updates

  • Parts: often $0–$300 for reflashing; full module replacement could be $300–$900+
  • Labor: $100–$350
  • Total: $100–$1,200 (depending on whether only software update or actual replacement)

• CVT fluid service (drain and fill or flush—use Honda-approved CVT fluid)

  • Parts: CVT fluid (and any filters if applicable): $15–$60
  • Labor: $100–$250
  • Total: $115–$310
  • Notes: Some CVT designs have limited serviceability; follow Honda recommendations for fluid type and service interval.

• Transmission fluid change with inspection or minor repairs

  • Parts: same as above plus gaskets if needed
  • Labor: $120–$300
  • Total: $240–$360 (or more if additional parts are required)

• Transmission removal/rebuild or replacement (only if internal damage is confirmed)

  • Parts: Transmission assembly or core rebuild: $1,500–$3,000 (used/trans rebuilt options vary)
  • Labor: $600–$1,500
  • Total: $2,100–$4,500+ (potentially higher at dealer)

• Transmission replacement (CVT) with used or remanufactured unit

  • Parts: $1,800–$3,500 (used/reman CVT)
  • Labor: $600–$1,200
  • Total: $2,400–$4,700+ (plus possible fluid service and ancillary parts)

Important note: If the issue is solely the sensor or wiring, the repair cost will be on the lower end. If the fault is due to an internal transmission fault, the cost can rise substantially. Always obtain a written diagnostic estimate before authorizing work, and ask about the possibility of a diagnostic charge credit if the repair is performed.

DIY VS PROFESSIONAL

• DIY potential:
  • Replacing the input speed sensor and repairing obvious wiring/connectors is within the reach of an experienced DIYer with basic hand tools, a reliable OBD-II scanner, and a service manual or wiring diagram.
  • Pros: lower cost, direct control of the repair, quick turnaround.
  • Cons: risk of misdiagnosis; CVT systems require careful handling; improper repairs can cause downstream damage; some Honda Civic CVT revisions require updated tool sets or dealer-level software.
• Professional route:
  • Pros: thorough diagnostic process, access to OEM service data, proper data logging, transmission-safe fluid handling, potential software/TCM updates, properly scoped repair with warranty options.
  • Cons: higher cost, scheduling time.
• Best practice: Start with a solid diagnostic of the sensor circuit and fluid health. If wiring and the sensor check out and the problem persists, lean toward professional diagnosis, especially if transmission behavior suggests internal issues or TCM concerns.

PREVENTION

• Regular maintenance and checks
  • Use the correct Honda-approved CVT fluid and follow the vehicle’s recommended service intervals. Using the proper fluid helps maintain sensor readings and transmission performance.
  • Check CVT fluid level and condition at the recommended service intervals; look for leaks or contamination.
  • Inspect the transmission wiring harness and connectors periodically for wear, moisture intrusion, or corrosion, especially in areas with road salt or harsh weather.
  • Keep cooling for the transmission as designed; overheating CVTs can accelerate wear and sensor-related symptoms.
  • Avoid aggressive driving patterns that can stress CVTs (rapid full-throttle accelerations, heavy towing if not rated for that load).
  • Ensure software updates for the ECM/TCM are applied when recommended by Honda, as some updates address sensor data handling and fault codes.
• If a P0715 fault occurs, address it promptly rather than continuing to drive extended distances, as prolonged faults can lead to more serious transmission problems.

Notes on data limitations

• The provided data shows no NHTSA complaints or recalls for 2022–2024 Honda Civic with this issue. “No recalls found in NHTSA database” applies here. The guide relies on general diagnostic knowledge for P0715 and typical Honda CVT behavior. Individual vehicle history, regional service bulletins, and dealer-specific software updates may affect diagnosis and repair strategies. Always cross-check with the latest Honda service information for your VIN if possible.

If you’d like, I can tailor this guide further to your exact Civic variant (engine option, CVT variant, trim) and help draft a step-by-step checklist you can print for shop use or a DIY workflow.