P0715 – Input/Turbine Speed Sensor Circuit Malfunction
Encountering the P0715 code in your Geely? Here is a complete guide to its causes, symptoms, and solutions.
What Does Code P0715 Mean
The P0715 code indicates a malfunction in the input/turbine speed sensor circuit, which is responsible for monitoring the speed of the transmission’s input shaft. This sensor provides critical data to the vehicle’s engine control module (ECM), allowing it to adjust transmission shift points and ensure smooth gear changes. When the ECM detects a problem with the sensor or its circuit, it triggers the P0715 code and illuminates the check engine light.
Common Geely Models Affected
- Geely Emgrand EC7
- Geely Emgrand EC8
- Geely GC2
- Geely GC5
- Geely GX7
Symptoms
- Harsh or erratic transmission shifting
- Slipping or hesitation between gears
- Decreased fuel efficiency
- Increased engine RPM when shifting gears
- Check engine light illumination
- Transmission overheating
- Vehicle enters limp mode
Causes Table
| Potential Cause | Probability (High/Medium/Low) |
|---|---|
| Failed input/turbine speed sensor | High |
| Corrosion or damage to sensor wiring | Medium |
| Faulty sensor circuit or connector | Medium |
| ECM malfunction or software issue | Low |
| Transmission mechanical failure | Low |
Diagnostic Steps
To diagnose the P0715 code, start by checking the sensor and its circuit for any signs of damage or corrosion. Use a multimeter to test the sensor’s voltage and resistance readings, which should change smoothly depending on engine RPM. Monitor the sensor’s signal using a scan tool, and compare it to the expected values. Inspect the wiring and connectors for any signs of damage or wear. If necessary, perform a transmission scan to check for any mechanical issues.
How to Fix
The primary repair method for the P0715 code involves replacing the faulty input/turbine speed sensor. This may require specialized tools and expertise, so it’s recommended to consult a professional mechanic. Additionally, any damaged or corroded wiring or connectors should be repaired or replaced. In some cases, updating the ECM software or replacing the transmission may be necessary.
Is it Safe to Drive with this Code
Driving with the P0715 code active can lead to decreased vehicle performance, reduced fuel efficiency, and increased risk of transmission damage. In extreme cases, the vehicle may enter limp mode, which can cause further damage to the transmission and other components. It’s recommended to address the issue as soon as possible to avoid any further complications.
Estimated Repair Cost
The estimated repair cost for the P0715 code can range from $200 to $1,500, depending on the extent of the damage and the required repairs. Replacing the input/turbine speed sensor can cost between $100 to $500, while repairing or replacing the wiring and connectors can add an additional $100 to $500. In some cases, transmission replacement may be necessary, which can cost upwards of $1,000 to $3,000.
Preventive Maintenance Tips
To prevent the P0715 code from occurring, it’s essential to perform regular maintenance on the vehicle’s transmission and sensor systems. This includes checking the transmission fluid level and condition, inspecting the sensor and its circuit for any signs of damage or corrosion, and updating the ECM software as necessary. Additionally, avoiding extreme driving conditions and maintaining a consistent driving schedule can help reduce the risk of transmission damage and sensor malfunction.
Related Trouble Codes
- Error P0716 on Geely — input/turbine speed sensor range/performance problem
- Error P0717 on Geely — input/turbine speed sensor circuit low input
- Error P0718 on Geely — input/turbine speed sensor circuit high input