B1628 – PRNDL Reverse Input Open Circuit

By Fixitfor.us |
Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

The ODBII code B1628 PRNDL Reverse Input Open Circuit indicates a malfunction in the reverse input circuit of the transmission range sensor, which detects the position of the gear selector.

The severity of ODBII code B1628 PRNDL Reverse Input Open Circuit is moderate.

Common Causes For: B1627 PRNDL Reverse Input Circuit Failure

  • Faulty PRNDL switch
  • Damaged wiring or connectors
  • Poor ground connection
  • Malfunctioning transmission control module (TCM)
  • Corroded terminals
  • Open circuit in the wiring harness
  • Faulty transmission range sensor

Common misdiagnosis for B1628 PRNDL Reverse Input Open Circuit

  • Faulty Transmission Range Sensor
  • Wiring Issues or Short Circuits
  • Malfunctioning Engine Control Module (ECM)
  • Defective Transmission Control Module (TCM)
  • Issues with the PRNDL switch
  • Faulty Gear Selector Assembly
  • Problems with the vehicle’s battery or charging system

Common Troubleshooting Steps

The OBD-II code B1628 indicates a problem with the PRNDL (Park, Reverse, Neutral, Drive, Low) switch, specifically an open circuit in the reverse input. This code is typically associated with automatic transmission systems and can affect the vehicle’s ability to determine the current gear selection. Here are some common troubleshooting steps to diagnose and resolve the issue:

  • Check the PRNDL Switch:: Inspect the PRNDL switch for any visible damage or wear.
  • Ensure that the switch is properly connected and that there are no loose or corroded connectors.
  • Inspect Wiring and Connectors:: Examine the wiring harness leading to the PRNDL switch for any signs of fraying, breaks, or shorts.
  • Check the connectors for corrosion, dirt, or damage that could affect the electrical connection.
  • Test the PRNDL Switch:: Use a multimeter to test the PRNDL switch for continuity. Ensure that the switch operates correctly in all positions (P, R, N, D, L).
  • If the switch is faulty, it may need to be replaced.
  • Check for Ground Issues:: Ensure that the ground connections related to the PRNDL switch are secure and free of corrosion.
  • A poor ground can lead to open circuit conditions.
  • Inspect the Transmission Control Module (TCM):: Check for any fault codes in the TCM that may provide additional information about the issue.
  • If necessary, reprogram or replace the TCM if it is determined to be faulty.
  • Look for Related Codes:: Check for any other OBD-II codes that may be related to the transmission or PRNDL system. This can help narrow down the issue.
  • Perform a Visual Inspection:: Inspect the transmission and surrounding components for any signs of leaks, damage, or other issues that could affect the PRNDL operation.
  • Clear Codes and Test Drive:: After performing repairs or adjustments, clear the codes using an OBD-II scanner.
  • Take the vehicle for a test drive to see if the code reappears.
  • Consult Service Manual:: Refer to the vehicle’s service manual for specific diagnostic procedures and specifications related to the PRNDL system.
  • Seek Professional Help:: If the issue persists after performing the above steps, consider consulting a professional mechanic or technician who specializes in transmission systems. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1628 OBD-II code.

Leave a Comment

You must be logged in to post a comment.