What Does B1953 Mean?
This code indicates the Body Control Module (BCM) has detected a short to ground condition in the feedback circuit of the rear seat up/down position potentiometer. The potentiometer provides variable resistance feedback to the BCM to indicate seat height position during power seat adjustment. The BCM detected voltage levels consistent with the signal wire being shorted directly to ground instead of receiving the expected variable voltage signal.
Common Causes
45%
Damaged or chafed wiring harness causing signal wire to contact ground, often at seat track or hinge points where flexing occurs
30%
Failed seat position potentiometer with internal short to ground
15%
Corroded or moisture-contaminated connector pins causing short circuit path to ground
10%
Failed seat control module or BCM with internal circuit fault
Diagnostic Steps
1
Step 1: Perform visual inspection of all rear seat wiring harnesses, particularly at flex points near seat tracks, hinges, and under-seat mounting areas. Look for pinched, chafed, or damaged wire insulation that could contact metal seat frame
2
Step 2: Disconnect the seat height potentiometer connector and measure resistance between the signal wire terminal (typically center pin) and ground using a digital multimeter. Should read infinite resistance (open circuit); any continuity indicates a wiring short to ground
3
Step 3: With potentiometer disconnected, measure resistance across the potentiometer terminals. Typical values range 1-10K ohms and should vary smoothly when manually moving the potentiometer shaft. No movement or zero resistance indicates failed potentiometer
4
Step 4: Inspect all connectors in the seat circuit for corrosion, bent pins, or moisture intrusion. Clean with electrical contact cleaner and dielectric grease. Check connector terminal retention and repair as needed
5
Step 5: If wiring and potentiometer test good, backprobe the BCM connector (seat circuit pins) with potentiometer connected and ignition on. Measure voltage on signal wire while moving seat; should see smooth 0.5-4.5V variation. Fixed 0V confirms BCM internal fault
6
Step 6: After repairs, clear codes, cycle seat through full up/down range multiple times, and verify code does not return. Monitor live data for smooth potentiometer voltage transition throughout travel range
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a short to ground condition in the feedback circuit of the rear seat up/down position potentiometer. The potentiometer provides variable resistance feedback to the BCM to indicate seat height position during power seat adjustment. The BC...
The most common cause of B1953 (Seat Rear Up/Down Potentiometer Feedback Circuit Short To Ground) is: Damaged or chafed wiring harness causing signal wire to contact ground, often at seat track or hinge points where flexing occurs
Typical repair costs for B1953 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 rear power seat height adjustment functionality. Seat will remain in current position and occupants can still use the seat safely, though powered height adjustment will be inoperative until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1953 to identify the root cause.
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Quick Info
Category
Body
System
Power Seat Control System
Difficulty
Type
Manufacturer
Recommended Tools
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