What Does B1722 Mean?
This code indicates that the Body Control Module (BCM) has detected an open circuit in the driver's seat rearward adjustment switch wiring or switch itself. The BCM monitors the electrical continuity of the power seat switch circuits and sets this code when it cannot detect proper electrical signal from the rearward movement switch. This affects the power seat adjustment system, preventing electronic rearward movement of the driver's seat.
Common Causes
40%
Faulty driver seat rearward switch with internal open circuit or broken contacts
30%
Broken or disconnected wiring harness between seat switch and BCM or seat motor
20%
Corroded or damaged connector pins at seat switch or under-seat connection points
10%
Failed BCM with internal circuit fault or damaged seat control module
Diagnostic Steps
1
Step 1: Perform visual inspection of driver seat switch assembly for physical damage, loose connections, or signs of liquid intrusion. Check all connectors at the seat switch panel for proper seating and corrosion.
2
Step 2: Using a multimeter, test continuity of the rearward switch by accessing the switch connector and checking for closed circuit when button is pressed and open circuit when released. Expected reading should be less than 1 ohm when pressed, infinite resistance when released.
3
Step 3: Backprobe the wiring harness at the seat switch connector with multimeter to check for voltage supply (typically 12V) and ground reference. Verify proper voltage present at supply wire and less than 0.5V at ground wire.
4
Step 4: Trace wiring harness from seat switch to under-seat connectors and BCM, checking for breaks, chafing, or pinched wires. Pay special attention to flex points where seat slides forward and backward.
5
Step 5: If all wiring tests good, substitute a known-good seat switch assembly to verify switch failure. If code clears with new switch, replace permanently; if code persists, test BCM input circuit for proper signal reception.
6
Step 6: Clear codes, cycle seat through all positions multiple times, and verify repair by confirming no code returns and proper rearward seat operation restored.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) has detected an open circuit in the driver's seat rearward adjustment switch wiring or switch itself. The BCM monitors the electrical continuity of the power seat switch circuits and sets this code when it cannot detect proper electrical signal ...
The most common cause of B1722 (Seat Driver Rearward Switch Circuit Open) is: Faulty driver seat rearward switch with internal open circuit or broken contacts
Typical repair costs for B1722 range from $75 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this only affects seat adjustment convenience feature. No immediate safety risk, but driver should ensure seat is in proper position before driving and may need to adjust seat manually if mechanism allows.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1722 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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