P2765 - Input/Turbine Speed Sensor Circuit Malfunction
The P2765 code indicates a problem with the input/turbine speed sensor circuit in the transmission. This sensor monitors the rotational speed of the turbine shaft inside the torque converter. The Powertrain Control Module (PCM) uses this data to control shift timing and torque converter lockup. A fault in this circuit can cause erratic shifting, poor fuel economy, and potential transmission damage if ignored.
1. Most Common Causes
- Faulty input/turbine speed sensor
- Damaged wiring or connectors in the sensor circuit
- Low transmission fluid level or contaminated fluid
- Internal transmission mechanical failure
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Erratic or harsh shifting
- Transmission slipping or delayed engagement
- Reduced fuel economy
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Inspect transmission fluid level and condition; top off or replace if necessary.
Step 3: Visually check the sensor wiring and connector for damage, corrosion, or loose connections.
Step 4: Test the sensor resistance and compare to manufacturer specifications; replace if out of range.
Step 5: If sensor and wiring are okay, check for internal transmission issues (e.g., damaged tone wheel).
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can lead to transmission damage. You may experience poor shifting and reduced performance.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor. Sensor replacement is usually $100-$200, but internal transmission repairs can be much higher.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.