B1958 — Seat Recline Forward/Backward Potentiometer Feedback Circuit Failure #

Note: The code description may vary depending on the vehicle manufacturer (OEM).

• Ford: Seat Recline Forward/Backward Potentiometer Feedback Circuit Failure
• Lincoln: Seat Backrest Position Sensor Circuit Malfunction
• Jaguar: Seat Recline Motor Position Sensor Signal Fault

Summary of the B1958 Code #

The B1958 diagnostic trouble code (DTC) relates to the seat recline potentiometer feedback circuit in power-adjustable seats. The potentiometer is a sensor that tracks the angle or position of the seat backrest, sending this information to the vehicle’s body control module (BCM) or seat control module. If the feedback signal from this circuit is out of range, missing, or erratic, the module will log code B1958. This code typically indicates an electrical issue—such as an open, short, or poor connection—affecting the feedback signal. Proper seat adjustment and memory seat functions may be impaired. Addressing this code quickly ensures both comfort and optimal safety.

Frequent Symptoms for Code B1958 #

A seat recline potentiometer circuit fault can disrupt driver and passenger comfort, as well as interfere with seat memory functions. Here are the most common symptoms associated with code B1958:

• Power seat recline function not responding or moving intermittently
• Seat memory recall failing or not storing positions properly
• Seat position indicator on the dashboard may be inaccurate or blank
• Warning lights or messages about seat adjustment system
• Audible chimes when attempting to adjust the seat

Probable Causes for Code B1958 #

The majority of B1958 cases stem from electrical issues within the seat recline position sensor circuit. Here’s a breakdown, in order of likelihood:

1. Faulty seat recline potentiometer (position sensor)
2. Damaged or corroded wiring/connectors in the feedback circuit
3. Poor electrical ground or loose connector at the seat module
4. Seat control module malfunction (less common)
5. Physical obstruction or damage to seat mechanism (rare)

Step-by-Step Diagnosis for Code B1958 #

Diagnosing B1958 requires a methodical approach, as electrical faults can be subtle. Here’s a recommended troubleshooting path:

• Read and record all current and pending DTCs using a professional scan tool; clear codes and observe if B1958 returns.
• Visually inspect seat wiring harness for pinched, cut, or corroded wires and connectors, especially near the seat tracks.
• Check seat recline potentiometer signal with a multimeter—look for expected voltage changes as the seat back is moved.
• Verify ground and power supply to the seat module and potentiometer circuit.
• Test potentiometer resistance according to OEM specifications (typically varies smoothly as seat reclines/returns).
• Substitute known-good sensor or module if available, to isolate the fault.

Possible Repairs for Code B1958 #

The correct fix for B1958 depends on the root cause identified during diagnosis. Common repair actions include:

• Replace faulty seat recline potentiometer (position sensor)
• Repair or replace damaged wires/connectors in the feedback circuit
• Clean and secure ground points or connector pins associated with the seat module
• Replace seat control module if confirmed defective after all other checks
• Remove physical obstructions or repair seat mechanism if jammed

Can You Drive With Code B1958? #

Yes, but with limitations. B1958 is not a safety-critical code, so the vehicle remains drivable. However, you may lose seat adjustment or memory functions, which can compromise comfort or make it harder for multiple drivers to safely position the seat. If the seat is stuck in an uncomfortable or unsafe position, avoid driving until repairs are made.

Vehicles Most Commonly Affected by Code B1958 #

B1958 is most frequently reported in vehicles with power-adjustable seats, particularly those from Ford, Lincoln, and Jaguar. These brands often use similar seat control architectures.

• Ford Explorer, Expedition, Taurus, Fusion
• Lincoln Navigator, MKX, MKZ
• Jaguar XF, XJ
• Other models from these manufacturers may also be affected.

Common Mistakes & Best Practices for Code B1958 #

Misdiagnosis can lead to unnecessary parts replacement or recurring issues. Here’s what to watch out for:

• Replacing the potentiometer without first inspecting wiring and connectors
• Overlooking ground circuit integrity
• Ignoring intermittent faults caused by seat movement (wires may only disconnect in certain positions)
• Not clearing codes after repair and confirming that the issue is resolved
• Using generic scan tools that may not provide detailed seat module data

Express FAQ for Code B1958 #

Still have questions? Here are some quick answers:

• Q: Can I reset the code without fixing the problem?
  A: You can clear the code with a scan tool, but if the fault persists, it will return once the module rechecks the circuit.
• Q: Is this repair covered under warranty?
  A: If your vehicle is under OEM warranty and the fault is due to manufacturing defect, it is likely covered. Check with your dealer for specifics.