Guide To P07BC OBD Error Code Solutions

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Is your Car’s Check Engine Light illuminating on the dashboard? Do you find sudden engine stalling and harsh gear shifts? And is the car engine running rough with decreased performance? This might be the indication of problems with the transmission system of the car which in other words can be an OBD code P07BC error.

The purpose of the transmission park position sensor/switch "B" circuit is to monitor the status of the transmission. This circuit sends a signal to the PCM when the transmission is placed into the park position. Based on the specific vehicle, this circuit is commonly a safety feature to prevent the starter from engaging with the automatic transmission in gear.

OBD code P07BC is an indication that the Powertrain Control Module (PCM) has detected a malfunction that is affecting the operation of the transmission park position sensor/switch "B" circuit. The specific situation determines the code activated by the PCM and the check engine light or the service engine soon light will be illuminated.

What causes this problem with the Transmission Park Position Sensor/Switch “B” Circuit Performance High?

• Faulty wiring to sensor and circuit
• Powertrain control module might require reprogramming or replacement
• Transmission park position sensor/switch might not be functioning properly
• Defective connector to sensor circuit

1. Transmission Park Position Sensor - Any fault in the sensor will result in transmission problems and harsh shifts. Thus, replace faulty sensor now!
2. Transmission Park Position Switch - Inspect for transmission park position switch and replace it, if required. Buy new position switch now!
3. Transmission Park Position Sensor/Switch Harness - Faulty harness will affect the transmission system function and thus needs replacement. Buy new harness now!
4. Transmission Park Position Sensor Connector - Checking for connector faults in one of the first step in solving an OBD code problem. Buy new connectors and replace faulty components now!
5. Powertrain Control Module - PCM issues directly affects the engine control and transmission control module. Thus, replace faulty components now.
6. Diagnostic Tool - Find wide range of diagnostic tools to detect and correct the OBD code error.

Willing to know some common symptoms of OBD Code P07BC? Your wish is our demand. Have a look at them below:

Common Symptoms

• Vehicle not engaging
• Check engine light illumination
• Transmission not shifting into park
• Transmission not moving out of park
• Starter will capture with the vehicle in gear

We have listed out some ways which would help you to correct the occurrence of OBD Code P07BC. They are mentioned here as follows:

• Repair or Replace Transmission Park Position Sensor/Switch
• Repair or Replace Transmission Park Position Sensor/Switch Harness
• Repair or Replace Transmission Park Position Sensor Connector
• Powertrain Control Module Replacement

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If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• A suitable OBD-II scanner (or code reader), a digital volt/ohmmeter, will be most helpful in performing a successful diagnosis. Begin with a visual inspection of all wiring and connectors.
• Repair or replace damaged, disconnected, shorted, or corroded wiring, connectors, and components as necessary. Always retest the system after repairs are completed to ensure success. If all system wiring, connectors, and components (Including fuses) appear to be in normal working order, connect the scanner (or code reader) to the diagnostic connector and record all stored codes and freeze frame data.
• Next, check for the voltage output from the sensor and if the input voltage is correct and the output is wrong, then it might be because of internal failure. Also check for the circuit and harness issues affecting the performance of the transmission system.
• If all the components check out, then inspect for the transmission control module and powertrain control module failure. Repair, reprogram and replace the TCM and PCM, if required.

Common Mistakes When Diagnosing The P07BC Code

Most of the time we tend to diagnose the problem without completely identifying the real cause of it. It is important to follow all the diagnostic steps and examine each component carefully before correcting. Some of the components to be focused on are listed below;

• Transmission park position sensor harness fault
• Powertrain control module failure
• Transmission park position sensor failing
• Transmission park position sensor connector