P07B5 Transmission Position Sensor / Switch Circuit Low Performance A

P07B5 Transmission Position Sensor / Switch Circuit Low Performance A

OBD-II DTC Datasheet

Transmission Park Position Sensor / Switch A Circuit Low Performance

What does this mean?

This is a Generic Powertrain Diagnostic Trouble Code (DTC) that applies to OBD-II vehicles that have a transmission park position switch / sensor. This may include but is not limited to Dodge, Ford, Toyota, Land Rover, VW, Chevrolet, etc. Despite the general nature, the exact repair steps may vary depending on the model year, make, model and transmission configuration.

DTC P07B5 is one of several possible codes associated with the transmission park position sensor/switch "A" circuit.

This code indicates that the powertrain control module (PCM) has detected a malfunction that affects the operation of the transmission park position sensor/switch "B" circuit. Codes that are commonly associated with transmission position sensor/switch "A" circuit malfunctions are P07B2, P07B3, P07B4, P07B5, P07B6, and P07B7. The specific situation determines the code activated by the PCM and soon the check engine light or service engine will come on.

The Transmission Park Position Sensor / Switch "A" circuit is designed to monitor the condition of the transmission. This circuit sends a signal to the PCM when the transmission is in park position. Depending on the vehicle, this circuit is usually a safety feature that prevents the starter from engaging the automatic transmission when the gear is engaged.

P07B5 is set by the PCM when it detects that the transmission park position sensor / switch circuit is poor.

What is the severity of this DTC?

The severity of this code depends on the specific problem, and the severity level can increase if not corrected in a timely manner. This code can become a safety issue requiring immediate attention if the starter motor engages with the vehicle in gear.

Photo of the park / neutral switch:

What are some of the symptoms of the code?

Symptoms of a P07B5 trouble code may include:

• The car will not start (the starter does not turn on)
• The starter will engage when the gear is engaged.
• Illuminated service engine light soon
• Check Engine light is on
• The transmission cannot shift out of parking.
• The transmission may not shift to park.

What are some of the common causes for the code?

Reasons for this P07B5 code may include:

• Transmission parking position sensor / switch defective
• Corroded or damaged connector
• Damaged or faulty wiring
• Defective PCM

What are some steps to troubleshoot the P07B5?

The first step in the process of troubleshooting any problem is to review the service bulletins for known problems with a particular vehicle.

Locate all the components associated with the transmission park sensor / derailleur "A" circuit. This will include the transmission park position sensor / switch, wiring, connectors, and the PCM in a simplex system. Depending on the model year, make and model of the vehicle, this diagram may include more components. Once these components are installed, a thorough visual inspection should be performed to check all associated wiring and connectors for obvious defects such as scratches, scuffs, exposed wires, or burn spots. Connectors should also be checked for corrosion or damaged pins.

Advanced steps

The additional steps become very vehicle specific and require appropriate advanced equipment to be performed accurately. These procedures require a digital multimeter and vehicle-specific technical reference documents. Voltage requirements vary by year of manufacture, make and model of vehicle.

Checking circuits

Voltage requirements will vary depending on the vehicle, the transmission park position sensor / switch circuit configuration, and the included components. Refer to technical data for the correct transmission park sensor / switch voltage range and appropriate troubleshooting sequence. A correct voltage input for a sensor / switch with no voltage output usually indicates an internal fault.

If this process detects that a power source or ground is missing, a continuity check may be required to check the condition of the wiring and connectors. Continuity tests are always performed with power removed from the circuit and normal readings should be 0 ohms of resistance unless otherwise specified in the specifications. Resistance or no continuity indicates faulty wiring or connectors that are shorted or open and should be repaired or replaced.

Normal repair

• Transmission Park Position Sensor / Switch Replacement
• Cleaning connectors from corrosion
• Repair or replacement of wiring
• Flashing or replacing PCM

Hopefully the information in this article has helped point you in the right direction to troubleshoot the transmission park position sensor / switch circuit problem. This article is for informational purposes only and specific technical data and service bulletins for your vehicle should always take priority.

Related DTC discussions

• There are currently no related topics in our forums. Post a new topic on the forum now.

Need more help with the P07B5 code?

If you still need help with DTC P07B5, post a question in the comments below this article.

NOTE. This information is provided for informational purposes only. It is not intended to be used as a repair recommendation and we are not responsible for any action you take on any vehicle. All information on this site is protected by copyright.