P1705 - TR Sensor Out of Self-Test Range
The P1705 code indicates that the Transmission Range (TR) sensor, also known as the neutral safety switch or manual lever position sensor, has failed its self-test. This sensor tells the powertrain control module (PCM) which gear the driver has selected. When the sensor's output voltage is outside the expected range during the self-test, the PCM sets this code. Common causes include a faulty TR sensor, misadjusted sensor, wiring issues, or a failing PCM.
01. Most Common Causes
- Faulty Transmission Range (TR) sensor
- Misadjusted TR sensor
- Damaged or corroded wiring/connectors to TR sensor
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission stuck in limp mode or fails to shift properly
- Incorrect gear indication on dashboard
- Engine starts in any gear or won't start in Park/Neutral
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect TR sensor wiring and connectors for damage or corrosion.
Step 3: Test TR sensor resistance/voltage per manufacturer specs.
Step 4: Adjust or replace TR sensor if out of range.
Step 5: Clear codes and test drive to verify repair.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The transmission may shift erratically or get stuck in limp mode, which can cause unsafe driving conditions and potential transmission damage.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, but costs can vary depending on vehicle make/model and shop rates.