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OBDII/EOBD diagnostics trouble codes definition

If your car is equipped with OBD-II or EOBD, you can access over 5,000 generic OBD-II diagnostic trouble codes (DTCs). These codes cover various vehicle systems, including Powertrain (P0XXX, P2XXX, P34XX), Body (B0XXX), Chassis (C0XXX), and Network/Communication (U0XXX, U2XXX, U3XXX). Additionally, there are more than 13,500 manufacturer-specific OBD-II codes available for diagnosing issues unique to different car brands and models. Make sure you're equipped with the right tools to understand and resolve these trouble codes to keep your vehicle running smoothly.

By using these OBD-II codes, you can effectively diagnose issues related to engine performance, safety features, suspension, and more.

Supported manufacturers with specific OBD2 codes:

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Detailed Description of Error P0705

OBDII error code P0705 is a generic trouble code that indicates a problem with the Transmission Range Sensor ''A'' Circuit, also known as the PRNDL input. This sensor is responsible for monitoring the transmission''s gear position and sending the information to the Powertrain Control Module (PCM). The PCM uses this data to control various transmission functions, such as shift timing, torque converter engagement, and line pressure.

The Transmission Range Sensor ''A'' Circuit is typically a Hall effect sensor or a potentiometer that provides a signal to the PCM indicating the transmission''s gear position. The signal is usually a voltage signal that varies depending on the gear position. The PCM expects to see a specific voltage range for each gear position, and if the signal is outside of the expected range, it will set a trouble code P0705.

When the error code P0705 is triggered, the PCM may also store freeze frame data, which can help technicians diagnose the problem. The freeze frame data may include information such as the engine speed, transmission gear position, and throttle position at the time the error code was triggered.

Possible Causes of Error P0705

  • Faulty Transmission Range Sensor ''A''
  • Wiring or connector issues between the Transmission Range Sensor ''A'' and the PCM
  • Corrosion or water damage to the Transmission Range Sensor ''A'' or its connector
  • PCM malfunction or software issue
  • Transmission internal failure, such as a faulty valve body or solenoid
  • Incorrect transmission fluid level or type
  • Transmission filter clog or restriction
  • Vehicle speed sensor malfunction

Possible Fixes for Error P0705

  • Replace the Transmission Range Sensor ''A'' if it''s faulty
  • Repair or replace the wiring or connector between the Transmission Range Sensor ''A'' and the PCM
  • Clean or replace the Transmission Range Sensor ''A'' connector if it''s corroded
  • Update the PCM software if it''s outdated
  • Perform a transmission flush and filter replacement if the transmission fluid is dirty or low
  • Check the vehicle speed sensor and replace it if necessary
  • Perform a transmission scan to check for any internal failures or solenoid issues
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