What Does B2206 Mean?
DTC B2206 indicates the Body Control Module (BCM) has detected an electrical fault in the power window switch circuit. This could mean an open circuit, short to ground, short to power, or excessive resistance in the wiring or switch assembly for one or more window switches. The BCM monitors switch inputs and sets this code when voltage or resistance values fall outside expected parameters during switch operation or monitoring.
Common Causes
45%
Faulty or worn power window switch with internal contact degradation or failure
30%
Corroded, damaged, or loose connector at window switch or BCM
15%
Damaged, chafed, or broken wiring between window switch and BCM
10%
Failed Body Control Module with internal circuit fault
Diagnostic Steps
1
Step 1: Perform visual inspection of all window switch connectors and terminals for corrosion, bent pins, moisture intrusion, or damage. Check door harness boot area for wire chafing where harness passes between door and body.
2
Step 2: Using a digital multimeter, test voltage at window switch connector with ignition on. Verify proper supply voltage (typically 12V) and ground (0V) are present at switch connector when disconnected.
3
Step 3: Test switch resistance across switch terminals using ohmmeter while actuating switch through all positions (up, down, neutral). Compare readings to manufacturer specifications (typically open circuit in neutral, low resistance when pressed).
4
Step 4: With switch reconnected, backprobe the signal wire at BCM connector while operating the window switch. Monitor voltage transitions to verify signal reaches BCM properly (should see voltage change between positions).
5
Step 5: Check for shorts to ground or power in window switch circuit wiring by measuring resistance between switch signal wire and ground, then signal wire and battery voltage with switch disconnected and harness isolated.
6
Step 6: If all circuit tests pass, substitute known-good window switch or BCM to confirm component failure. Clear codes, operate windows through full cycles, and verify code does not return.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
DTC B2206 indicates the Body Control Module (BCM) has detected an electrical fault in the power window switch circuit. This could mean an open circuit, short to ground, short to power, or excessive resistance in the wiring or switch assembly for one or more window switches. The BCM monitors switch i...
The most common cause of B2206 (Window Switch Circuit) is: Faulty or worn power window switch with internal contact degradation or failure
Typical repair costs for B2206 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 power window operation. Repair is not urgent but should be addressed for convenience and to prevent potential water intrusion if windows cannot be closed properly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2206 to identify the root cause.
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Quick Info
Category
Body
System
Body Electrical System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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