Transmission Park Position Sensor Circuit High
The P07BA code indicates that the transmission park position sensor circuit is reading a higher than expected voltage. This sensor tells the powertrain control module (PCM) whether the transmission is in Park. A high voltage reading can be caused by a faulty sensor, wiring issues (shorted to power), or a problem with the PCM. This can prevent the engine from starting or cause incorrect gear indication.
1. Symptoms You Will Notice
- Engine may not start in Park
- Incorrect gear indicator on dash
- Transmission stuck in Park or unable to shift
- Check Engine Light illuminated
2. Most Common Causes
- Faulty park position sensor
- Short to voltage in sensor circuit
- Corroded or damaged connector
- PCM failure (rare)
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect the park position sensor connector and wiring for damage or corrosion.
Step 3: Test sensor voltage and ground at the connector with a multimeter.
Step 4: Compare sensor readings to manufacturer specifications; replace sensor if out of range.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The vehicle may not start or may shift unexpectedly, posing a safety risk.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on the sensor location and vehicle make.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.