Technical Description of OBD-II Trouble Code
The performance of the Transmission Park Position Sensor/Switch A Circuit is low.
What does that mean?
This is a generic diagnostic trouble code (DTC) for powertrain and applies to OBD-II vehicles with a transmission park position switch/sensor. This includes vehicles from Dodge, Ford, Toyota, Land Rover, VW, Chevrolet, etc. The repair steps may vary depending on the year, make, model, and powertrain configuration.
Trouble code P07B5 is one of several codes associated with the Transmission Park Position Sensor/Switch “A” Circuit.
This code indicates that the Powertrain Control Module (PCM) has detected a malfunction in the transmission park position sensor/switch “B” circuit. The codes commonly associated with transmission park position sensor/switch “A” circuit malfunctions are P07B2, P07B3, P07B4, P07B5, P07B6, and P07B7. The specific code activated by the PCM depends on the situation, and the check engine light or service engine soon light will illuminate.
The purpose of the transmission park position sensor/switch “A” circuit is to monitor the status of the transmission. This circuit sends a signal to the PCM when the transmission is in the park position. In certain vehicles, this circuit serves as a safety feature to prevent the starter from engaging when the automatic transmission is in gear.
Code P07B5 is set by the PCM when the transmission park position sensor/switch “A” circuit is detected as having low performance.
What is the severity of this DTC?
The severity of this code varies depending on the specific malfunction. If not corrected promptly, it could become a safety issue, especially if the starter engages while the vehicle is in gear.
Photo of a park/neutral position switch:
What are some of the symptoms of the code?
Symptoms of a P07B5 trouble code may include:
What are some of the common causes of the code?
Causes for this P07B5 code may include:
What are some P07B5 troubleshooting steps?
The first step in troubleshooting any malfunction is to research the Technical Service Bulletins for known issues with the specific vehicle.
Locate all of the components associated with the transmission park position sensor/switch “A” circuit. This includes the transmission park position sensor/switch, wiring, connectors, and the PCM on a simplex system. Depending on the specific year, make, and model of the vehicle, this circuit may incorporate more components. After locating these components, conduct a thorough visual inspection to check all of the associated wiring and connectors for obvious defects such as scraping, rubbing, bare wires, or burn spots. Also, check the connectors for corrosion buildup or damaged pins.
Advanced Steps
The advanced steps are highly vehicle-specific and require the appropriate advanced equipment for accurate performance. These procedures require a digital multimeter and the specific technical references for the vehicle. Voltage requirements will vary based on the specific year, make, and model of the vehicle.
Circuit Checks
Voltage requirements will vary based on the specific vehicle, the transmission park position sensor/switch circuit configuration, and the incorporated components. Refer to technical data to obtain the correct voltage range for the transmission park position sensor/switch and the appropriate troubleshooting sequence to follow. The absence of a power source or ground may require continuity testing to check the condition of the wiring and connectors. Continuity tests should always be performed with the power removed from the circuit, and the normal readings should be 0 ohms of resistance unless otherwise specified by the technical data. Resistance or no continuity indicates faulty wiring or connectors that are shorted or open and must be repaired or replaced.
Common Repairs
We always recommend seeking professional service to solve this issue. However, if that is not possible, we offer the option to permanently delete this specific DTC. All other codes will continue to function. If you are interested, please upload your ECU file to our portal.
