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Supported manufacturers with specific OBD2 codes:

Detailed Description of Error P071E

OBDII error code P071E is a generic trouble code that indicates a problem with the transmission mode switch ''B'' circuit. This code is typically associated with automatic transmissions and is triggered when the powertrain control module (PCM) detects an abnormal voltage reading in the transmission mode switch ''B'' circuit.

The transmission mode switch is responsible for sending signals to the PCM to indicate the driver''s desired gear selection, such as park, reverse, neutral, drive, or low gear. The ''B'' circuit is one of the multiple circuits that make up the transmission mode switch, and it''s responsible for sending a specific signal to the PCM.

When the PCM detects a low voltage reading in the ''B'' circuit, it sets the P071E code and illuminates the check engine light. This code can be triggered by a variety of factors, including faulty wiring, corrosion, or a malfunctioning transmission mode switch.

Possible Causes of Error P071E

  • Faulty transmission mode switch
  • Corrosion or damage to the transmission mode switch wiring or connector
  • Short circuit in the ''B'' circuit wiring
  • Open circuit in the ''B'' circuit wiring
  • Faulty PCM or transmission control module
  • Low battery voltage or weak battery
  • Faulty transmission range sensor or transmission position sensor
  • Wiring or connector issues between the transmission mode switch and the PCM

Possible Fixes for Error P071E

  • Inspect the transmission mode switch wiring and connector for signs of corrosion or damage, and repair or replace as needed
  • Check the transmission mode switch for proper operation and replace if necessary
  • Use a multimeter to test the voltage in the ''B'' circuit and identify any short or open circuits
  • Repair or replace any short or open circuits in the ''B'' circuit wiring
  • Check the PCM and transmission control module for any signs of malfunction and replace if necessary
  • Charge or replace the battery if the voltage is low
  • Check the transmission range sensor or transmission position sensor for proper operation and replace if necessary
  • Consult a professional mechanic or transmission specialist for further diagnosis and repair if the problem persists
Can't find the right OBDII code in the catalog? Get professional advice from our smart assistant and find out the exact cause of the problem today!

If your car is equipped with OBD-II or EOBD, you can access over 9,500 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 15,400 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.

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