OBD2 Car ScannerWhat does P07B8 mean?
P07B8 stands for Transmission Park Position Sensor/Switch B Circuit Open. The transmission control system has found a problem. You may notice harsh, late or missing gear changes.
Powertrain codes cover the engine, transmission and emissions. When the car's computer sees a reading outside its normal range, it stores this code and may turn on a warning light on the dashboard.
Common causes
- Low or old transmission fluid
- Faulty shift solenoid
- Faulty transmission speed or temperature sensor
- Damaged wiring
- Internal transmission wear
What to do
- Read all stored and pending codes with a scanner. Several codes together often point to one cause.
- Note the freeze frame data (speed, temperature, load) recorded when the code was set.
- Inspect the wiring and connectors of the part named in the code for damage, corrosion or looseness.
- Fix the most likely and cheapest cause first, then clear the code and drive to see if it comes back.
Read this code from your own car
Plug in a cheap ELM327 adapter and the app shows every fault code, what it means and how to fix it.
Frequently asked questions
What does P07B8 mean?
P07B8 means “Transmission Park Position Sensor/Switch B Circuit Open”. It belongs to the transmission group: The transmission control system has found a problem. You may notice harsh, late or missing gear changes.
Is it safe to drive with P07B8?
Avoid driving long distances. This kind of fault can cause damage or affect safety, so get it checked as soon as possible.
How do I clear P07B8?
Fix the cause, then clear the code with an OBD2 scanner or app. If the fault is still there, the code will come back.
Related codes
- P07B4Transmission Park Position Sensor/Switch A Circuit High
- P07B5Transmission Park Position Sensor/Switch A Circuit Performance/Low
- P07B6Transmission Park Position Sensor/Switch A Circuit Performance High
- P07B7Transmission Park Position Sensor/Switch A Circuit Intermittent/Erratic
- P07B9Transmission Park Position Sensor/Switch B Circuit Low
- P07BATransmission Park Position Sensor/Switch B Circuit High
- P07BBTransmission Park Position Sensor/Switch B Circuit Performance/Low
- P07BCTransmission Park Position Sensor/Switch B Circuit Performance High
Code meanings can vary by manufacturer. This page is general guidance, not a repair manual. Always confirm the cause before replacing parts.