Transmission Park Position Sensor Circuit High Voltage
The P07B6 code indicates that the transmission control module (TCM) has detected a voltage signal from the park position sensor that is higher than the expected range. This sensor tells the TCM when the transmission is in park. A high voltage reading can be caused by a faulty sensor, wiring issues (short to voltage), or a problem with the TCM itself. This can lead to incorrect gear position detection, potentially causing starting issues or transmission misbehavior.
01. Most Common Causes
- Faulty park position sensor
- Short to voltage in sensor circuit
- Corroded or damaged wiring/connector
- Faulty transmission control module (TCM)
02. Symptoms You Will Notice
- Engine may not start in park
- Transmission stuck in park or fails to shift
- Check Engine Light illuminated
- Incorrect gear display on dashboard
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the park position sensor and wiring for damage or corrosion.
Step 3: Test sensor voltage and ground at the connector using a multimeter.
Step 4: Compare sensor signal voltage to manufacturer specifications.
Step 5: If sensor is faulty, replace it; if wiring issue, repair as needed.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The vehicle may not start or could shift unexpectedly, posing a safety risk.
How much does it cost to fix?▼
Typically between $50 and $150 for parts and labor, depending on the cause and vehicle model.