Transmission Range Sensor Circuit Low Input
The P0707 code indicates that the Powertrain Control Module (PCM) has detected a low voltage signal from the transmission range sensor (TRS) circuit. This sensor tells the PCM which gear the transmission is in (Park, Reverse, Neutral, Drive, etc.). A low input means the voltage is below the expected range, often due to a short to ground, faulty sensor, or wiring issues. This can cause incorrect gear selection, harsh shifting, or no start conditions.
01. Most Common Causes
- Faulty transmission range sensor
- Short to ground in sensor circuit wiring
- Corroded or damaged connector
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light on
- Transmission stuck in one gear or limp mode
- Incorrect gear indication on dashboard
- Engine may not start in Park or Neutral
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect transmission range sensor connector and wiring for damage, corrosion, or shorts.
Step 3: Test sensor voltage and resistance per manufacturer specs.
Step 4: Check for TSBs related to P0707 for your vehicle.
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 one gear, which can cause unsafe driving conditions and further damage.
How much does it cost to fix?▼
Typically $50-$150 for diagnosis and sensor replacement, but costs can vary depending on labor rates and parts.