Transmission Park Position Sensor Circuit High
The P07BA 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, and a high circuit condition can be caused by a faulty sensor, wiring issues (short to voltage), or a problem with the TCM itself. This can prevent the vehicle from starting or cause incorrect gear selection.
01. Most Common Causes
- Faulty park position sensor
- Short to voltage in the sensor circuit
- Damaged wiring or connector
- Faulty transmission control module (TCM)
02. Symptoms You Will Notice
- Engine may not start or start only in neutral
- Check Engine Light illuminated
- Transmission stuck in park or fails to shift
- Incorrect gear display on dashboard
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to read the code and check for related codes.
Step 2: Inspect the park position sensor and its wiring for damage, corrosion, or shorts.
Step 3: Test the sensor's voltage and resistance per manufacturer specifications.
Step 4: If sensor and wiring are okay, test the TCM for proper operation.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. 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, but can be higher if the TCM needs replacement.