P0B34 - OBD Trouble Code

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The trouble code P0B34 can be explicated as High Voltage service Disconnect Circuit Performance. If the voltage is out of order, the engine will experience performance issue and affected fuel economy. Also affected by the sluggish acceleration and the braking risk, the OBD code P0B34 error code gets stored in the PCM indicating problematic high voltage service disconnect circuit issue.

This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made from 1996 up to present. It’s also more common among Audi, Citroen, Chevrolet, Ford, Hyundai, Nissan, Peugeot, and Volkswagen vehicles. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model, powertrain configuration type, to another.

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

• Powertrain Control Module failure
• High voltage service disconnect circuit faulty
• Battery Interface Control Module failure
• Defective fuel pump
• Damaged transmission shift solenoids
• Open/Short voltage service disconnect circuit harness
• Hybrid battery pack circuit poor electrical connection

1. Engine Control Module - OBD Error Code P0B34 can also be due to faulty ECMs. It’s better to get the faulty electricals replaced as soon as possible. Replace faulty ECM today!
2. Powertrain Control Module - P0B34 error code also relates to problems with the powertrain which can store and flash wrong error code. Find all the Powertrain related parts with us.
3. Diagnostic Tool - In order to detect the error, one needs high grade diagnostic tools. Visit us today to grab amazing deals.
4. Exhaust System - Replace faulty exhaust systems and parts as they can be a major reason for flashing of this error in the PCM.
5. Fuel Pump – If the fuel pump is not working properly, the engine will not be able to perform to its potential and might also damage various parts. Buy new fuel pump today.
6. Shift Solenoid – If the shift solenoid if faulty, it will affect the transmission shifts badly. Buy new shift solenoid now!

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0B34 here:

Common Symptoms

• Delayed Acceleration
• Vehicle Engine not starting
• White smoke coming out of exhaust
• Electrical components not responding properly
• Malfunction Indication Light illumination
• Rising exhaust temperatures and emissions

Want to correct the Trouble Code P0B34? Read these points mentioned below:

• Repair or replace car battery
• Repair or replace cut off switch
• Restore faulty fuel pump
• Repair or replace battery current sensor
• Repair circuit wiring and connectors
• Repair or replace faulty exhaust manifolds
• Check and replace faulty oxygen sensor
• Replace faulty fuel injectors

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Here are some steps which you should follow in order to diagnose this P0B34 fault code:

• Careful inspection of the vehicle is carried out by the mechanic with the help of a scanner.
• After this inspection, recover every stored codes in the vehicle as well as freeze frame data by inserting a scanner to the diagnostic port of the vehicle.
• Store this information as it may help him with further diagnosis. After the codes are recovered, the vehicle is reset, test- driven to check for the occurrence of the error code.
• If the code returns instantly, he will then start inspecting the transmission fluid for any leaks.
• In some cases, the transmission fluid can be dirty or it can be contaminated.
• The area of leak will be found and fixed. The dirty or contaminated fluid should be replaced with clear fluid.
• After this, the technician visually inspects every wires, connectors, harness and fuses for any possible damages or defective and repairs them as needed.
• Once the error code is repaired, it is always the best idea to test drive and check the vehicle if the error code appears again which can help the technician to know the area of fault and as to how the error code occurred in the vehicle.
• Typical causes of low pump pressure include clogged hydraulic passages, a defective pump, faulty shift solenoids, or a faulty electronic pressure regulator. Replace them as required.

Common Mistakes When Diagnosing The P0B34 Code

• Battery contactor assembly might start failing
• Wiring and connector issues
• Problematic fuel pump and shift solenoids
• Some issues related to the battery energy control module