B1952 — Seat Rear Up/Down Potentiometer Feedback Circuit Short To Battery #

Note: The description for DTC B1952 may vary depending on the vehicle manufacturer (OEM). Always consult your official repair manual for the precise definition that applies to your vehicle.

Known description variations for B1952:

• Seat Rear Height Adjustment Feedback Circuit Short to Battery (Ford, Lincoln, Mercury)
• Rear Seat Height Sensor Circuit High (Jaguar, Land Rover)
• Seat Rear Up/Down Potentiometer Circuit High Input (General Motors)

Summary of code B1952 #

DTC B1952 indicates the vehicle’s control module has detected a short to battery voltage in the seat rear up/down potentiometer feedback circuit. The potentiometer is a variable resistor that measures the position of the rear section of the power seat, allowing the control module to monitor and adjust seat height. When this circuit detects an abnormally high voltage (as if it were directly connected to battery power), it may point to a wiring fault, connector issue, or a failed potentiometer. Although not typically a safety-critical fault, it can prevent proper seat adjustment and may impact comfort, ergonomics, or accessibility—especially in vehicles with memory seat functions.

Common symptoms for code B1952 #

When this fault occurs, you may notice one or more issues related to seat movement or feedback. Some faults are subtle, while others may completely disable the rear up/down adjustment. Typical symptoms include:

• Power seat rear height adjustment inoperative
• Seat moves only in some directions or not at all
• Seat memory function does not recall/stores incorrect position
• Warning light or error message on the dashboard (for high-end models)
• Possible clicking or buzzing sound from under the seat

Probable causes for code B1952 (in order of likelihood) #

Several factors can lead to a short to battery in the potentiometer feedback circuit. The most common causes, in order of frequency, are:

1. Chafed or pinched wiring—Insulation damage causing direct contact with a 12V source
2. Loose, corroded, or damaged seat wiring connectors
3. Internal short circuit within the seat potentiometer (feedback sensor)
4. Faulty seat adjustment switch or module
5. Water ingress or moisture under the seat
6. Aftermarket modifications (e.g., seat covers, added electronics) interfering with wiring

Step-by-step diagnosis for code B1952 #

A systematic diagnosis ensures accurate identification of the root cause. Use a digital multimeter and, if possible, a scan tool with live data for the seat module. Here’s how to proceed:

• 1. Check for other DTCs: Scan all modules for related codes (especially body and seat modules).
• 2. Inspect seat wiring: Visually examine harnesses under and around the seat for pinched, frayed, or exposed wires.
• 3. Test connectors: Unplug and inspect all seat connectors for bent, corroded, or pushed-out pins.
• 4. Measure circuit voltage: With the key on, use a multimeter to check the potentiometer feedback wire for unexpected battery voltage (12V+).
• 5. Check potentiometer resistance: Disconnect the potentiometer and measure its resistance across the specified pins; compare to OEM specs.
• 6. Bypass test: Temporarily substitute a known-good potentiometer or test harness if available.
• 7. Check seat module and switch: If wiring and sensor check out, use the scan tool to test seat module operation and switch inputs.

Possible repairs for code B1952 #

The necessary repair depends directly on the diagnostic findings. Here are common solutions aligned with the potential causes:

• Repair or replace damaged seat wiring harness
• Clean, repair, or replace faulty connectors
• Replace the seat rear up/down potentiometer (feedback sensor)
• Replace faulty seat adjustment switch or seat control module
• Address water leaks or remove moisture under the seat
• Undo or properly reroute aftermarket wiring interfering with seat circuits

Is it safe to drive with code B1952? #

Yes, in most cases you can continue driving with code B1952 present. This fault primarily affects seat adjustment and comfort, not vehicle safety or drivability. However, if the seat is stuck in an uncomfortable or unsafe position, or if the fault is accompanied by other electrical issues, address the issue as soon as practical. For vehicles with memory seats or accessibility needs, prompt repair is recommended for convenience.

Vehicles most commonly affected by code B1952 #

While this code can occur on any vehicle equipped with power seat memory systems, it is most frequently reported on:

• Ford (Explorer, Expedition, F-150, Fusion, Taurus)
• Lincoln (MKZ, Navigator, Town Car)
• Mercury (Mountaineer, Sable)
• Jaguar (XF, XJ)
• Land Rover (Range Rover, Discovery)
• General Motors vehicles with power seat memory

Common mistakes & best practices for B1952 #

Technicians and DIYers sometimes overlook simple causes or rush to replace expensive components. To avoid wasted time and money:

• Don’t immediately replace the seat potentiometer—wiring faults are more common.
• Always inspect the harness closely, especially where it moves or rubs against metal rails.
• Use dielectric grease on connectors if exposed to moisture.
• Aftermarket seat covers or electronics can pinch or dislodge wiring—double-check after installation.
• Clear the code and retest after each step to confirm the fault is resolved.

Quick FAQ for code B1952 #

Still have questions? Here are answers to common concerns:

• Can I manually adjust my power seat if B1952 is present?
  If the rear up/down function is disabled, you may not be able to adjust that part of the seat until the fault is repaired. Other adjustments may still work.
• Will replacing the seat potentiometer always fix B1952?
  Not always. Since wiring issues are common, always perform a thorough inspection and test before replacing any sensor or module.