B1958 – Seat Recline Forward/Backward Potentiometer Feedback Circuit Failure

The ODBII code B1958 indicates a malfunction in the seat recline forward/backward potentiometer feedback circuit, which means the vehicle’s system is not receiving the correct signals from the potentiometer that controls the seat recline position.

The severity of ODBII code B1958 is moderate.

Common Causes For: B1957 Seat Front Up/Down Potentiometer Feedback Circuit Short To Ground

• Faulty seat recline potentiometer
• Damaged wiring or connectors in the feedback circuit
• Short circuit or open circuit in the potentiometer circuit
• Corrosion or poor connections at the potentiometer or related connectors
• Malfunctioning seat control module
• Software issues in the vehicle’s control system
• Mechanical obstruction or damage to the seat recline mechanism

Common misdiagnosis for B1958 Seat Recline Forward/Backward Potentiometer Feedback Circuit Failure

• Faulty seat motor
• Wiring issues or shorts
• Malfunctioning seat control module
• Incorrectly calibrated seat position sensors
• Battery or power supply problems
• Faulty connectors or terminals
• Software or firmware issues in the vehicle’s control system

Common Troubleshooting Steps

The OBD-II code B1958 indicates a problem with the seat recline forward/backward potentiometer feedback circuit. This code is typically associated with issues in the seat adjustment system, particularly the electronic components that control the seat’s recline function. Here are some common troubleshooting steps to diagnose and potentially resolve the issue:

• Check for Additional Codes: Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues.
• Inspect the Wiring and Connectors:
• Visually inspect the wiring harness and connectors associated with the seat recline mechanism. Look for any signs of damage, corrosion, or loose connections.
• Ensure that all connectors are securely attached and free of dirt or debris.
• Test the Potentiometer:
• The potentiometer is responsible for providing feedback on the seat position. Use a multimeter to test the resistance of the potentiometer while moving the seat recline switch.
• Compare the readings to the specifications in the vehicle’s service manual. If the readings are outside the specified range, the potentiometer may need to be replaced.
• Check the Seat Control Module:
• If the potentiometer appears to be functioning correctly, the issue may lie within the seat control module. Check for any signs of damage or malfunction.
• If possible, perform a reset or reprogramming of the module according to the manufacturer’s instructions.
• Inspect the Seat Adjustment Switch:
• Test the seat adjustment switch for proper operation. A faulty switch can prevent the potentiometer from receiving the correct signals.
• If the switch is defective, it may need to be replaced.
• Look for Ground Issues:
• Ensure that the ground connections for the seat adjustment system are secure and free of corrosion. A poor ground can lead to erratic behavior and fault codes.
• Check for Short Circuits:
• Use a multimeter to check for any short circuits in the wiring harness. A short can cause incorrect signals to be sent to the control module.
• Consult the Service Manual:
• Refer to the vehicle’s service manual for specific diagnostic procedures and specifications related to the seat recline system. This can provide valuable information for troubleshooting.
• Clear the Code and Test Drive:
• After performing any repairs or adjustments, clear the trouble code using the OBD-II scanner and take the vehicle for a test drive to see if the code reappears.
• Seek Professional Help:
• If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with the specific make and model of your vehicle. By following these troubleshooting steps, you can systematically identify and address the cause of the B1958 code.