Error Code P0705
Moderate Issue
DTC Code P0705 indicates a Transmission Range Sensor Circuit Malfunction where the park/neutral position (PNP) switch, which includes a transmission range switch, fails to accurately detect the selector lever position and send the correct signal to the Transmission Control Module (TCM).
What symptoms indicate Error Code P0705?
- Engine Light ON: The check engine light or service engine soon warning light illuminates, indicating a potential issue with the transmission range sensor circuit.
- Transmission Shifting Issues: The vehicle may experience erratic or harsh shifting, or may not shift at all, due to the malfunctioning transmission range sensor.
- Incorrect Gear Display: The gear position indicator on the dashboard may display the wrong gear, as the sensor fails to accurately detect the transmission's current position.
- Vehicle Stuck in Limp Mode: The vehicle may enter limp mode, restricting engine power and speed to prevent further damage, as a result of the sensor circuit malfunction.
What causes OBD code Error Code P0705?
- The Park/Neutral Position Switch may be faulty, leading to incorrect transmission range readings.
- A misadjusted Park/Neutral Position Switch can cause the transmission control module to receive inaccurate signals.
- An open or shorted harness in the Park/Neutral Position Switch can disrupt the electrical flow, causing malfunction.
- Poor electrical connections in the Park/Neutral Position Switch circuit can result in intermittent or failed signal transmission.
How to fix OBD code Error Code P0705?
- Verify DTC Code: Ensure the DTC P0705 is active by using a diagnostic scanner. Clear the code and test drive the vehicle to see if it returns.
- Inspect Transmission Range Sensor: Locate the transmission range sensor, typically found on the transmission housing. Check for any visible damage or corrosion on the sensor and its connector.
- Check Wiring and Connectors: Inspect the wiring harness and connectors leading to the transmission range sensor for any signs of damage, fraying, or corrosion. Ensure all connections are secure.
- Test Sensor Voltage: Using a multimeter, measure the voltage at the sensor connector. Compare the readings with the manufacturer's specifications to ensure they are within range.
- Perform Continuity Test: Conduct a continuity test on the sensor's wiring to ensure there are no breaks or shorts in the circuit.
- Check Transmission Fluid Level: Verify that the transmission fluid level is correct, as low fluid can affect sensor operation. Top up if necessary.
- Replace Sensor if Necessary: If the sensor is faulty or the readings are outside the specified range, replace the transmission range sensor and retest the system.