P07B8 — Transmission Park Position Sensor/Switch B Circuit/Open

What Does P07B8 Mean?

P07B8 is a diagnostic trouble code indicating: Transmission Park Position Sensor/Switch B Circuit/Open. This code relates to the transmission system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P07B8

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Transmission Park Position Sensor/Switch B readings
⚠️ Related system operating intermittently
⚠️ Harsh or delayed shifting

Common Causes

🔍 Wiring issue in Transmission Park Position Sensor/Switch B circuit (damaged, chafed, or corroded)
🔍 Faulty Transmission Park Position Sensor/Switch B connector or terminal
🔍 Failed Transmission Park Position Sensor/Switch B
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P07B8 mean?

P07B8 indicates: Transmission Park Position Sensor/Switch B Circuit/Open. The vehicle's computer has detected that the Transmission Park Position Sensor/Switch B is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P07B8?

Only short distances if absolutely necessary. P07B8 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix P07B8?

Repair costs for P07B8 typically range from $150 to $500, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and repair Transmission Park Position Sensor/Switch B wiring and connectors
🔧 Replace faulty Transmission Park Position Sensor/Switch B

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P07B8: Transmission Park Position Sensor/Switch B Circuit/Open