Transmission Park Position Sensor/Switch Circuit Performance High
The P07BC code indicates that the transmission park position sensor or switch circuit is reading a voltage or resistance higher than the expected range. This sensor tells the powertrain control module (PCM) when the transmission is in park. A high circuit performance issue typically means there is an open or high resistance in the circuit, possibly due to a faulty sensor, damaged wiring, or a poor connection. This can prevent the vehicle from starting or cause incorrect gear position readings.
01. Most Common Causes
- Faulty park position sensor/switch
- Damaged or corroded wiring/connectors in the sensor circuit
- Open circuit or high resistance in the sensor ground or signal wire
- Faulty PCM (rare)
02. Symptoms You Will Notice
- Engine may not start or start only in neutral
- Transmission may not shift out of park
- Check Engine Light illuminated
- Incorrect gear position display on dashboard
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect the park position sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Using a multimeter, check the sensor's resistance and voltage against manufacturer specifications.
Step 4: If sensor and wiring are okay, test the circuit continuity from the sensor to the PCM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe to drive. The vehicle may not start or may shift unexpectedly, posing a safety risk. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the cause. A sensor replacement is usually under $100, while wiring repairs may be less.