Error Code P0B35: What It Means & What To Do?

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The trouble code P0B35 can be defined as High Voltage Service Disconnect Circuit Low. The output voltage is always being monitored by the Powertrain control module. This trouble code would be set by the PCM when this voltage would not be as per the specifications set by the manufacturer.

This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another.

This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

What causes this problem with the High Voltage Service Disconnect Circuit Low?

• Rusty exhaust systems
• Cracked exhaust manifolds or damaged or missing gaskets or donuts causing air leaks
• Faulty Powertrain Control Module
• Voltage Service Disconnect Port Failure
• Voltage Service Disconnect Port harness is open or shorted
• Poor electrical connection to Voltage Service Disconnect Port circuit

1. Heated Oxygen Sensor – The fault in the oxygen sensor leads to failure of the fuel delivery system, and ECM. Replace faulty sensors immediately.
2. Engine Control Module - Faulty ECM may flash and store wrong OBD error and cause engine stalling and hard idles. Thus replace faulty ECM immediately.
3. Powertrain Control Module - P0B35 error code also relates to problems with the PCM. This can cause wrong reading being stored in the PCM from the sensor. Replace faulty PCM now.
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5. Exhaust System - A leaky or damaged exhaust can hamper the vehicle’s performance. Thus, replace damaged exhaust parts now.
6. Auto Transmission Control Module - P0B35 code can display due to some issues in the Auto Transmission Control Module. So it is very important to replace the Auto Transmission Control Module with us at equitable prices.

Willing to know some common symptoms of OBD Code P0B35? Your wish is our demand. Have a look at them below:

Common Symptoms

• Significant Drop in engine power
• Poor drivability & acceleration
• Reduced fuel economy and increased fuel consumption
• Abnormal throttle response
• General reduction in efficiency 

We have listed out some ways which would help you to correct the occurrence of OBD Code P0B35. They are mentioned here as follows:

• Faults in the ECM/PCM to be fixed
• Replacement of flawed battery smart unit
• Repair or replace damaged hybrid battery pack
• Fuel pump and transmission circuit connectors and wiring repairs
• ECU should be repaired or replaced as per the need
• Recondition the non-functioning voltage service disconnect circuit harness
• Adjust the flawed electrical connection

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If you want to easily diagnose this P0B35 fault code, then all you have to do is to follow the steps which are mentioned below:

• A technician typically begins by hooking the vehicle up to an OBD-II scanner in order to verify that the code is present, and check for other codes.
• This data along with freeze frame data is recorded, and the codes are then cleared to see if they reoccur.
• Next, there should be a visual inspection of the wiring and connectors to check for loose connections, corrosion, or shorts.
• Replacement of Damaged wiring/connections to the IAT (Intake Air Temperature) Sensor, fuel pump, transmission sensors, and solenoids
• Repair faulty PCM sensor that may require reprogramming.
• Replace Leaky and damaged intake/inlet pipe immediately.
• Faulty MAF (Mass Airflow Sensor) needs replacement as it directly hampers the engine performance.
• To perform a thorough diagnosis, any transmission leaks should be repaired and the transmission should be filled with the proper amount and type of fluid (if the fluid smells really "burnt" and you are experienced enough to detect it, you may go ahead and condemn the transmission)

Common Mistakes When Diagnosing The P0B35 Code

• Faulty transmission sensor and solenoids
• Battery circuit wiring and connector issues
• PCM and ECU faults that may require reprogramming
• Exhaust system leakages
• Battery energy control module failure