Transmission Park Position Sensor Circuit Performance/Low
The P07B5 code indicates a problem with the transmission park position sensor circuit, specifically that the signal is performing below the expected range or is low. This sensor tells the PCM (Powertrain Control Module) whether the transmission is in Park, which is critical for starting the engine and engaging the starter interlock. A low or poor performance signal can prevent the engine from starting or cause incorrect gear indication.
01. Most Common Causes
- Faulty park/neutral position switch
- Wiring or connector issues (corrosion, damage, loose connection)
- Low battery voltage or poor ground
- PCM software or hardware failure (rare)
02. Symptoms You Will Notice
- Engine will not start or starts only in Neutral
- Check Engine Light illuminated
- Transmission stuck in Park or fails to shift out of Park
- Incorrect gear indicator on dashboard
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Inspect the park/neutral position switch and its wiring for damage, corrosion, or loose connections.
Step 3: Test the switch's resistance and voltage with a multimeter according to manufacturer specifications.
Step 4: Check battery voltage and ground connections; repair if low.
Step 5: If all else is normal, replace the park/neutral position switch and clear the code.
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 unexpectedly shift out of Park, posing a safety risk. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
The typical repair cost ranges from $50 to $150, including parts (switch) and labor. Diagnostic fees may be extra.