Transmission Park Position Sensor Circuit Performance/Low
The P07B5 code indicates a problem with the transmission park position sensor circuit, specifically a performance or low voltage issue. This sensor tells the powertrain control module (PCM) when the transmission is in park. A fault can cause incorrect gear position readings, leading to starting or shifting issues.
1. Symptoms You Will Notice
- Engine may not start in park
- Transmission may not shift out of park
- Check Engine Light illuminated
- Incorrect gear display on dashboard
2. Most Common Causes
- Faulty or worn park position sensor
- Sensor circuit wiring with excessive resistance or short to ground
- Corroded, loose, or moisture-contaminated sensor connector
- Mechanical misalignment of the sensor or transmission selector linkage
- Internal failure of the transmission control module (TCM)
- Low transmission fluid level or internal wear affecting park mechanism positioning
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect the park position sensor and its wiring for damage or corrosion.
Step 3: Test sensor voltage and ground circuits with a multimeter.
Step 4: Check battery voltage and charging system output.
Step 5: If all else is fine, replace the park position sensor.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended as the vehicle may not start or shift properly, potentially leaving you stranded.
How much does it cost to fix?▼
Typically between $50 and $150 for parts and labor, depending on the vehicle and shop rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.