What Does B1951 Mean?
This code indicates that the Body Control Module (BCM) or Seat Control Module has detected an open circuit in the feedback potentiometer for the rear seat's up/down adjustment motor. The potentiometer provides position feedback to the control module so it knows where the seat is during height adjustment. An open circuit means no signal is being received, preventing proper seat position monitoring and potentially disabling power seat height adjustment.
Common Causes
45%
Broken or disconnected wiring between the seat potentiometer and control module, including corroded or loose connector terminals
30%
Failed seat height adjustment potentiometer with internal open circuit or worn resistive track
15%
Damaged or pinched wiring harness under the seat from repeated movement or trapped objects
10%
Failed seat control module or BCM with internal circuit fault on the potentiometer input channel
Diagnostic Steps
1
Step 1: Perform visual inspection of the rear seat base and remove seat trim panels to access the height adjustment motor and potentiometer assembly. Check all wiring and connectors for obvious damage, corrosion, or disconnection.
2
Step 2: Disconnect the potentiometer connector and measure resistance across the potentiometer terminals using a digital multimeter while manually moving the seat up and down. Expect smooth resistance change typically between 1k-10k ohms. Infinite resistance or erratic readings confirm potentiometer failure.
3
Step 3: If potentiometer tests good, check continuity of all wires from the potentiometer connector back to the seat control module or BCM connector. Test each wire individually for opens and shorts to ground or power. Repair or replace damaged harness sections.
4
Step 4: With potentiometer connected, backprobe the signal wire at the control module connector with a multimeter set to DC voltage. Key on, expect to see a varying voltage (typically 0.5-4.5V) as the seat is moved. No voltage change confirms wiring or module issue.
5
Step 5: If all wiring and potentiometer test good, suspect the control module. Check module ground circuits and power supply. Clear codes, reconnect all components, and operate the seat through full range of motion to verify repair.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) or Seat Control Module has detected an open circuit in the feedback potentiometer for the rear seat's up/down adjustment motor. The potentiometer provides position feedback to the control module so it knows where the seat is during height adjust...
The most common cause of B1951 (Seat Rear Up/Down Potentiometer Feedback Circuit Open) is: Broken or disconnected wiring between the seat potentiometer and control module, including corroded or loose connector terminals
Typical repair costs for B1951 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this only affects power seat adjustment convenience features. Repair at your convenience, though occupants may not be able to achieve optimal seating position for comfort.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1951 to identify the root cause.
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Quick Info
Category
Body
System
Body Comfort Systems (Power Seat Controls)
Difficulty
Type
Manufacturer
Recommended Tools
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