Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that your car's computer is having trouble with a sensor that tells it if the car is in park. It's like when you can't tell if a toy is turned off because the switch is broken.
The P07B9 code is triggered when the Transmission Control Module (TCM) detects a low voltage signal from the park position sensor/switch B circuit.
The Transmission Park Position Sensor/Switch B is responsible for detecting the transmission's park position. If the sensor outputs a voltage lower than the expected range, the TCM will set the P07B9 code. This could be due to an electrical issue such as a short circuit, faulty sensor, or wiring problems.
• Check Engine Light is on
• Car may not start
• Transmission may not shift properly
• Faulty park position sensor/switch
• Wiring issues or short circuits
• Faulty Transmission Control Module (TCM)
Transmission Control Module (TCM): A computer that controls the transmission functions.
OBD-II: On-Board Diagnostics, a standardized system for vehicle self-diagnostics and reporting.
• Use an OBD-II scanner to confirm the code.
• Inspect the park position sensor and its wiring for damage.
• Test the voltage and continuity of the sensor circuit.
• Replace the park position sensor/switch if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the Transmission Control Module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect transmission wiring and connectors.
• Ensure proper maintenance of the transmission system.
• Avoid rough handling of the gear shift.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid driving the vehicle if it does not shift properly.
Check with the vehicle manufacturer for warranty coverage on transmission components.
This code has been more prevalent in vehicles with electronic transmission controls as they age.
Moderate – It should be addressed soon to avoid potential transmission issues.
Driving with a malfunctioning transmission sensor can lead to unsafe driving conditions.
• Vehicle must be in park.
• Ignition must be on.
The park position sensor is typically located on the transmission housing.
Q: Can I drive with a P07B9 code?
A: It's not recommended to drive with this code as it can lead to transmission issues.
Q: How do I reset the P07B9 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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