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 the circuit can cause incorrect readings, leading to erratic shifting, poor fuel economy, and potential transmission damage.
01. 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
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Erratic or harsh shifting
- Transmission slipping or delayed engagement
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for 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 voltage output with a multimeter and compare to manufacturer specifications.
Step 5: If sensor and wiring are okay, check for internal transmission issues (e.g., damaged turbine shaft or valve body).
04. Commonly Affected Makes
05. 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 cause transmission damage and unsafe driving conditions. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for sensor replacement and basic diagnostics, but can be higher if internal transmission repairs are needed.