Transmission Range Sensor Circuit Malfunction (P0705)
The P0705 code indicates a malfunction in the transmission range sensor (TRS) circuit, also known as the PRNDL input. This sensor tells the PCM which gear position (Park, Reverse, Neutral, Drive, Low) the driver has selected. A faulty sensor, wiring issues, or a misadjusted shift linkage can cause incorrect gear position readings, leading to drivability problems and potential transmission damage.
01. Most Common Causes
- Faulty transmission range sensor
- Damaged or corroded wiring/connectors in the TRS circuit
- Misadjusted or damaged shift linkage
- Internal transmission mechanical issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Incorrect gear position indicated on dashboard
- Engine starts in gears other than Park or Neutral
- Transmission stuck in limp mode or fails to shift properly
03. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P0705 is present.
Step 2: Visually inspect the TRS connector and wiring for damage or corrosion.
Step 3: Test the TRS signal voltage with a multimeter while moving the shifter through all positions.
Step 4: Check shift linkage adjustment and operation.
Step 5: If necessary, replace the transmission range sensor and clear codes.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with P0705 can cause erratic shifting, starting in gear, or transmission damage. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, but costs can vary depending on the vehicle and if additional repairs are needed.